Use lambdas when possible

Replace anonymous inner classes with lambda declarations (when possible
using method references).

See gh-9781

spring-boot-actuator-docs/src/restdoc/java/org/springframework/boot/actuate/hypermedia/EndpointDocumentation.java

@@ -52,8 +52,6 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.context.web.WebAppConfiguration;
 import org.springframework.test.web.servlet.MockMvc;
-import org.springframework.test.web.servlet.MvcResult;
-import org.springframework.test.web.servlet.ResultHandler;
 import org.springframework.util.FileCopyUtils;
 import org.springframework.util.StringUtils;
 
@@ -161,32 +159,9 @@ public class EndpointDocumentation {
 
 	@Test
 	public void endpoints() throws Exception {
-		final File docs = new File("src/main/asciidoc");
-		final Map<String, Object> model = new LinkedHashMap<>();
-		final List<EndpointDoc> endpoints = new ArrayList<>();
-		model.put("endpoints", endpoints);
-		for (MvcEndpoint endpoint : getEndpoints()) {
-			final String endpointPath = (StringUtils.hasText(endpoint.getPath())
-					? endpoint.getPath() : "/");
-			if (!SKIPPED.contains(endpointPath)) {
-				String output = endpointPath.substring(1);
-				output = output.length() > 0 ? output : "./";
-				this.mockMvc
-						.perform(get("/application" + endpointPath)
-								.accept(ActuatorMediaTypes.APPLICATION_ACTUATOR_V2_JSON))
-						.andExpect(status().isOk()).andDo(document(output))
-						.andDo(new ResultHandler() {
-
-							@Override
-							public void handle(MvcResult mvcResult) throws Exception {
-								EndpointDoc endpoint = new EndpointDoc(docs,
-										endpointPath);
-								endpoints.add(endpoint);
-							}
-
-						});
-			}
-		}
+		File docs = new File("src/main/asciidoc");
+		Map<String, Object> model = new LinkedHashMap<>();
+		model.put("endpoints", getEndpointDocs(docs));
 		File file = new File(RESTDOCS_OUTPUT_DIR + "/endpoints.adoc");
 		file.getParentFile().mkdirs();
 		try (PrintWriter writer = new PrintWriter(file, "UTF-8")) {
@@ -196,18 +171,36 @@ public class EndpointDocumentation {
 		}
 	}
 
+	private List<EndpointDoc> getEndpointDocs(File docs) throws Exception {
+		final List<EndpointDoc> endpoints = new ArrayList<>();
+		for (MvcEndpoint endpoint : getEndpoints()) {
+			String path = endpoint.getPath();
+			path = (StringUtils.hasText(path) ? path : "/");
+			if (!SKIPPED.contains(path)) {
+				documentEndpoint(path);
+				endpoints.add(new EndpointDoc(docs, path));
+			}
+		}
+		return endpoints;
+	}
+
 	private Collection<? extends MvcEndpoint> getEndpoints() {
 		List<? extends MvcEndpoint> endpoints = new ArrayList<>(
 				this.mvcEndpoints.getEndpoints());
-		endpoints.sort(new Comparator<MvcEndpoint>() {
-			@Override
-			public int compare(MvcEndpoint o1, MvcEndpoint o2) {
-				return o1.getPath().compareTo(o2.getPath());
-			}
-		});
+		endpoints.sort(Comparator.comparing(MvcEndpoint::getPath));
 		return endpoints;
 	}
 
+	private String documentEndpoint(final String endpointPath) throws Exception {
+		String output = endpointPath.substring(1);
+		output = (output.length() > 0 ? output : "./");
+		this.mockMvc
+				.perform(get("/application" + endpointPath)
+						.accept(ActuatorMediaTypes.APPLICATION_ACTUATOR_V2_JSON))
+				.andExpect(status().isOk()).andDo(document(output));
+		return output;
+	}
+
 	public static class EndpointDoc {
 
 		private String path;

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/CacheStatisticsAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -137,15 +137,11 @@ public class CacheStatisticsAutoConfiguration {
 
 		@Bean
 		public CacheStatisticsProvider<Cache> noOpCacheStatisticsProvider() {
-			return new CacheStatisticsProvider<Cache>() {
-				@Override
-				public CacheStatistics getCacheStatistics(CacheManager cacheManager,
-						Cache cache) {
-					if (cacheManager instanceof NoOpCacheManager) {
-						return NO_OP_STATS;
-					}
-					return null;
+			return (cacheManager, cache) -> {
+				if (cacheManager instanceof NoOpCacheManager) {
+					return NO_OP_STATS;
 				}
+				return null;
 			};
 		}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcAutoConfiguration.java

@@ -120,14 +120,7 @@ public class EndpointWebMvcAutoConfiguration
 	@Bean
 	public ManagementServletContext managementServletContext(
 			final ManagementServerProperties properties) {
-		return new ManagementServletContext() {
-
-			@Override
-			public String getContextPath() {
-				return properties.getContextPath();
-			}
-
-		};
+		return properties::getContextPath;
 	}
 
 	@Override

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcHypermediaManagementContextConfiguration.java

@@ -101,14 +101,7 @@ public class EndpointWebMvcHypermediaManagementContextConfiguration {
 	@Bean
 	public ManagementServletContext managementServletContext(
 			final ManagementServerProperties properties) {
-		return new ManagementServletContext() {
-
-			@Override
-			public String getContextPath() {
-				return properties.getContextPath();
-			}
-
-		};
+		return properties::getContextPath;
 	}
 
 	@ConditionalOnEnabledEndpoint("actuator")

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/ShutdownEndpoint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,23 +62,22 @@ public class ShutdownEndpoint extends AbstractEndpoint<Map<String, Object>>
 			return SHUTDOWN_MESSAGE;
 		}
 		finally {
-			Thread thread = new Thread(new Runnable() {
-				@Override
-				public void run() {
-					try {
-						Thread.sleep(500L);
-					}
-					catch (InterruptedException ex) {
-						Thread.currentThread().interrupt();
-					}
-					ShutdownEndpoint.this.context.close();
-				}
-			});
+			Thread thread = new Thread(this::performShutdown);
 			thread.setContextClassLoader(getClass().getClassLoader());
 			thread.start();
 		}
 	}
 
+	private void performShutdown() {
+		try {
+			Thread.sleep(500L);
+		}
+		catch (InterruptedException ex) {
+			Thread.currentThread().interrupt();
+		}
+		this.context.close();
+	}
+
 	@Override
 	public void setApplicationContext(ApplicationContext context) throws BeansException {
 		if (context instanceof ConfigurableApplicationContext) {

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/DataSourceHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,6 @@ import javax.sql.DataSource;
 
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.boot.jdbc.DatabaseDriver;
-import org.springframework.dao.DataAccessException;
 import org.springframework.dao.support.DataAccessUtils;
 import org.springframework.jdbc.IncorrectResultSetColumnCountException;
 import org.springframework.jdbc.core.ConnectionCallback;
@@ -120,13 +119,11 @@ public class DataSourceHealthIndicator extends AbstractHealthIndicator
 	}
 
 	private String getProduct() {
-		return this.jdbcTemplate.execute(new ConnectionCallback<String>() {
-			@Override
-			public String doInConnection(Connection connection)
-					throws SQLException, DataAccessException {
-				return connection.getMetaData().getDatabaseProductName();
-			}
-		});
+		return this.jdbcTemplate.execute((ConnectionCallback<String>) this::getProduct);
+	}
+
+	private String getProduct(Connection connection) throws SQLException {
+		return connection.getMetaData().getDatabaseProductName();
 	}
 
 	protected String getValidationQuery(String product) {

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/RabbitHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,11 +16,6 @@
 
 package org.springframework.boot.actuate.health;
 
-import java.util.Map;
-
-import com.rabbitmq.client.Channel;
-
-import org.springframework.amqp.rabbit.core.ChannelCallback;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.util.Assert;
 
@@ -46,14 +41,8 @@ public class RabbitHealthIndicator extends AbstractHealthIndicator {
 	}
 
 	private String getVersion() {
-		return this.rabbitTemplate.execute(new ChannelCallback<String>() {
-			@Override
-			public String doInRabbit(Channel channel) throws Exception {
-				Map<String, Object> serverProperties = channel.getConnection()
-						.getServerProperties();
-				return serverProperties.get("version").toString();
-			}
-		});
+		return this.rabbitTemplate.execute((channel) -> channel.getConnection()
+				.getServerProperties().get("version").toString());
 	}
 
 }

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/buffer/BufferMetricReader.java

@@ -19,7 +19,6 @@ package org.springframework.boot.actuate.metrics.buffer;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
-import java.util.function.BiConsumer;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
 
@@ -48,7 +47,7 @@ public class BufferMetricReader implements MetricReader, PrefixMetricReader {
 	}
 
 	@Override
-	public Metric<?> findOne(final String name) {
+	public Metric<?> findOne(String name) {
 		Buffer<?> buffer = this.counterBuffers.find(name);
 		if (buffer == null) {
 			buffer = this.gaugeBuffers.find(name);
@@ -81,17 +80,10 @@ public class BufferMetricReader implements MetricReader, PrefixMetricReader {
 	private <T extends Number, B extends Buffer<T>> void collectMetrics(
 			Buffers<B> buffers, Predicate<String> predicate,
 			final List<Metric<?>> metrics) {
-		buffers.forEach(predicate, new BiConsumer<String, B>() {
-
-			@Override
-			public void accept(String name, B value) {
-				metrics.add(asMetric(name, value));
-			}
-
-		});
+		buffers.forEach(predicate, (name, value) -> metrics.add(asMetric(name, value)));
 	}
 
-	private <T extends Number> Metric<T> asMetric(final String name, Buffer<T> buffer) {
+	private <T extends Number> Metric<T> asMetric(String name, Buffer<T> buffer) {
 		return new Metric<>(name, buffer.getValue(), new Date(buffer.getTimestamp()));
 	}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/buffer/Buffers.java

@@ -19,7 +19,6 @@ package org.springframework.boot.actuate.metrics.buffer;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
-import java.util.function.Function;
 import java.util.function.Predicate;
 
 /**
@@ -34,20 +33,15 @@ abstract class Buffers<B extends Buffer<?>> {
 	private final ConcurrentHashMap<String, B> buffers = new ConcurrentHashMap<>();
 
 	public void forEach(final Predicate<String> predicate,
-			final BiConsumer<String, B> consumer) {
-		this.buffers.forEach(new BiConsumer<String, B>() {
-
-			@Override
-			public void accept(String name, B value) {
-				if (predicate.test(name)) {
-					consumer.accept(name, value);
-				}
+			BiConsumer<String, B> consumer) {
+		this.buffers.forEach((name, value) -> {
+			if (predicate.test(name)) {
+				consumer.accept(name, value);
 			}
-
 		});
 	}
 
-	public B find(final String name) {
+	public B find(String name) {
 		return this.buffers.get(name);
 	}
 
@@ -55,15 +49,10 @@ abstract class Buffers<B extends Buffer<?>> {
 		return this.buffers.size();
 	}
 
-	protected final void doWith(final String name, final Consumer<B> consumer) {
+	protected final void doWith(String name, Consumer<B> consumer) {
 		B buffer = this.buffers.get(name);
 		if (buffer == null) {
-			buffer = this.buffers.computeIfAbsent(name, new Function<String, B>() {
-				@Override
-				public B apply(String name) {
-					return createBuffer();
-				}
-			});
+			buffer = this.buffers.computeIfAbsent(name, (k) -> createBuffer());
 		}
 		consumer.accept(buffer);
 	}

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/buffer/CounterBuffers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.boot.actuate.metrics.buffer;
 
-import java.util.function.Consumer;
-
 /**
  * Fast writes to in-memory metrics store using {@link CounterBuffer}.
  *
@@ -26,27 +24,17 @@ import java.util.function.Consumer;
  */
 public class CounterBuffers extends Buffers<CounterBuffer> {
 
-	public void increment(final String name, final long delta) {
-		doWith(name, new Consumer<CounterBuffer>() {
-
-			@Override
-			public void accept(CounterBuffer buffer) {
-				buffer.setTimestamp(System.currentTimeMillis());
-				buffer.add(delta);
-			}
-
+	public void increment(String name, long delta) {
+		doWith(name, (buffer) -> {
+			buffer.setTimestamp(System.currentTimeMillis());
+			buffer.add(delta);
 		});
 	}
 
-	public void reset(final String name) {
-		doWith(name, new Consumer<CounterBuffer>() {
-
-			@Override
-			public void accept(CounterBuffer buffer) {
-				buffer.setTimestamp(System.currentTimeMillis());
-				buffer.reset();
-			}
-
+	public void reset(String name) {
+		doWith(name, (buffer) -> {
+			buffer.setTimestamp(System.currentTimeMillis());
+			buffer.reset();
 		});
 	}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/buffer/GaugeBuffers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.boot.actuate.metrics.buffer;
 
-import java.util.function.Consumer;
-
 /**
  * Fast writes to in-memory metrics store using {@link GaugeBuffer}.
  *
@@ -26,13 +24,10 @@ import java.util.function.Consumer;
  */
 public class GaugeBuffers extends Buffers<GaugeBuffer> {
 
-	public void set(final String name, final double value) {
-		doWith(name, new Consumer<GaugeBuffer>() {
-			@Override
-			public void accept(GaugeBuffer buffer) {
-				buffer.setTimestamp(System.currentTimeMillis());
-				buffer.setValue(value);
-			}
+	public void set(String name, double value) {
+		doWith(name, (buffer) -> {
+			buffer.setTimestamp(System.currentTimeMillis());
+			buffer.setValue(value);
 		});
 	}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/dropwizard/ReservoirFactory.java

@@ -32,14 +32,7 @@ public interface ReservoirFactory {
 	/**
 	 * Default empty {@link ReservoirFactory} implementation.
 	 */
-	ReservoirFactory NONE = new ReservoirFactory() {
-
-		@Override
-		public Reservoir getReservoir(String name) {
-			return null;
-		}
-
-	};
+	ReservoirFactory NONE = (name) -> null;
 
 	/**
 	 * Return the {@link Reservoir} instance to use or {@code null} if a custom reservoir

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/reader/MetricRegistryMetricReader.java

@@ -18,7 +18,6 @@ package org.springframework.boot.actuate.metrics.reader;
 
 import java.beans.PropertyDescriptor;
 import java.util.HashSet;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -113,18 +112,15 @@ public class MetricRegistryMetricReader implements MetricReader, MetricRegistryL
 
 	@Override
 	public Iterable<Metric<?>> findAll() {
-		return new Iterable<Metric<?>>() {
-			@Override
-			public Iterator<Metric<?>> iterator() {
-				Set<Metric<?>> metrics = new HashSet<>();
-				for (String name : MetricRegistryMetricReader.this.names.keySet()) {
-					Metric<?> metric = findOne(name);
-					if (metric != null) {
-						metrics.add(metric);
-					}
+		return () -> {
+			Set<Metric<?>> metrics = new HashSet<>();
+			for (String name : MetricRegistryMetricReader.this.names.keySet()) {
+				Metric<?> metric = findOne(name);
+				if (metric != null) {
+					metrics.add(metric);
 				}
-				return metrics.iterator();
 			}
+			return metrics.iterator();
 		};
 	}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/repository/InMemoryMetricRepository.java

@@ -21,7 +21,6 @@ import java.util.concurrent.ConcurrentNavigableMap;
 
 import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository;
-import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository.Callback;
 import org.springframework.boot.actuate.metrics.writer.Delta;
 
 /**
@@ -43,17 +42,12 @@ public class InMemoryMetricRepository implements MetricRepository {
 		final String metricName = delta.getName();
 		final int amount = delta.getValue().intValue();
 		final Date timestamp = delta.getTimestamp();
-		this.metrics.update(metricName, new Callback<Metric<?>>() {
-
-			@Override
-			public Metric<?> modify(Metric<?> current) {
-				if (current != null) {
-					return new Metric<>(metricName, current.increment(amount).getValue(),
-							timestamp);
-				}
-				return new Metric<>(metricName, (long) amount, timestamp);
+		this.metrics.update(metricName, (current) -> {
+			if (current != null) {
+				return new Metric<>(metricName, current.increment(amount).getValue(),
+						timestamp);
 			}
-
+			return new Metric<>(metricName, (long) amount, timestamp);
 		});
 	}
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/rich/InMemoryRichGaugeRepository.java

@@ -18,7 +18,6 @@ package org.springframework.boot.actuate.metrics.rich;
 
 import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository;
-import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository.Callback;
 import org.springframework.boot.actuate.metrics.writer.Delta;
 import org.springframework.boot.actuate.metrics.writer.MetricWriter;
 
@@ -36,19 +35,14 @@ public class InMemoryRichGaugeRepository implements RichGaugeRepository {
 	private final SimpleInMemoryRepository<RichGauge> repository = new SimpleInMemoryRepository<>();
 
 	@Override
-	public void increment(final Delta<?> delta) {
-		this.repository.update(delta.getName(), new Callback<RichGauge>() {
-
-			@Override
-			public RichGauge modify(RichGauge current) {
-				double value = ((Number) delta.getValue()).doubleValue();
-				if (current == null) {
-					return new RichGauge(delta.getName(), value);
-				}
-				current.set(current.getValue() + value);
-				return current;
+	public void increment(Delta<?> delta) {
+		this.repository.update(delta.getName(), (current) -> {
+			double value = ((Number) delta.getValue()).doubleValue();
+			if (current == null) {
+				return new RichGauge(delta.getName(), value);
 			}
-
+			current.set(current.getValue() + value);
+			return current;
 		});
 	}
 
@@ -56,17 +50,12 @@ public class InMemoryRichGaugeRepository implements RichGaugeRepository {
 	public void set(Metric<?> metric) {
 		final String name = metric.getName();
 		final double value = metric.getValue().doubleValue();
-		this.repository.update(name, new Callback<RichGauge>() {
-
-			@Override
-			public RichGauge modify(RichGauge current) {
-				if (current == null) {
-					return new RichGauge(name, value);
-				}
-				current.set(value);
-				return current;
+		this.repository.update(name, (current) -> {
+			if (current == null) {
+				return new RichGauge(name, value);
 			}
-
+			current.set(value);
+			return current;
 		});
 	}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointAutoConfigurationTests.java

@@ -17,7 +17,6 @@
 package org.springframework.boot.actuate.autoconfigure;
 
 import java.io.IOException;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -277,12 +276,9 @@ public class EndpointAutoConfigurationTests {
 
 		@Bean
 		PublicMetrics customPublicMetrics() {
-			return new PublicMetrics() {
-				@Override
-				public Collection<Metric<?>> metrics() {
-					Metric<Integer> metric = new Metric<>("foo", 1);
-					return Collections.<Metric<?>>singleton(metric);
-				}
+			return () -> {
+				Metric<Integer> metric = new Metric<>("foo", 1);
+				return Collections.<Metric<?>>singleton(metric);
 			};
 		}
 
@@ -294,12 +290,9 @@ public class EndpointAutoConfigurationTests {
 		@Bean
 		@Order(InfoContributorAutoConfiguration.DEFAULT_ORDER - 1)
 		public InfoContributor myInfoContributor() {
-			return new InfoContributor() {
-				@Override
-				public void contribute(Info.Builder builder) {
-					builder.withDetail("name", "bar");
-					builder.withDetail("version", "1.0");
-				}
+			return (builder) -> {
+				builder.withDetail("name", "bar");
+				builder.withDetail("version", "1.0");
 			};
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointMvcIntegrationTests.java

@@ -36,7 +36,6 @@ import org.junit.runner.RunWith;
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.endpoint.Endpoint;
-import org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping;
 import org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMappingCustomizer;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
@@ -134,14 +133,7 @@ public class EndpointMvcIntegrationTests {
 
 		@Bean
 		public EndpointHandlerMappingCustomizer mappingCustomizer() {
-			return new EndpointHandlerMappingCustomizer() {
-
-				@Override
-				public void customize(EndpointHandlerMapping mapping) {
-					mapping.setInterceptors(interceptor());
-				}
-
-			};
+			return (mapping) -> mapping.setInterceptors(interceptor());
 		}
 
 		@Bean

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcAutoConfigurationTests.java

@@ -808,14 +808,7 @@ public class EndpointWebMvcAutoConfigurationTests {
 
 		@Bean
 		public EndpointHandlerMappingCustomizer mappingCustomizer() {
-			return new EndpointHandlerMappingCustomizer() {
-
-				@Override
-				public void customize(EndpointHandlerMapping mapping) {
-					mapping.setInterceptors(interceptor());
-				}
-
-			};
+			return (mapping) -> mapping.setInterceptors(interceptor());
 		}
 
 		@Bean

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/HealthIndicatorAutoConfigurationTests.java

@@ -447,12 +447,7 @@ public class HealthIndicatorAutoConfigurationTests {
 
 		@Bean
 		public HealthIndicator customHealthIndicator() {
-			return new HealthIndicator() {
-				@Override
-				public Health health() {
-					return Health.down().build();
-				}
-			};
+			return () -> Health.down().build();
 		}
 
 	}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/InfoContributorAutoConfigurationTests.java

@@ -190,10 +190,7 @@ public class InfoContributorAutoConfigurationTests {
 
 		@Bean
 		public InfoContributor customInfoContributor() {
-			return new InfoContributor() {
-				@Override
-				public void contribute(Info.Builder builder) {
-				}
+			return (builder) -> {
 			};
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/ManagementWebSecurityAutoConfigurationTests.java

@@ -42,8 +42,6 @@ import org.springframework.security.authentication.TestingAuthenticationToken;
 import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
 import org.springframework.security.config.annotation.authentication.configuration.EnableGlobalAuthentication;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.AuthorityUtils;
 import org.springframework.security.core.userdetails.UserDetails;
@@ -284,14 +282,8 @@ public class ManagementWebSecurityAutoConfigurationTests {
 
 		@Bean
 		public AuthenticationManager myAuthenticationManager() {
-			this.authenticationManager = new AuthenticationManager() {
-
-				@Override
-				public Authentication authenticate(Authentication authentication)
-						throws AuthenticationException {
-					return new TestingAuthenticationToken("foo", "bar");
-				}
-			};
+			this.authenticationManager = (
+					authentication) -> new TestingAuthenticationToken("foo", "bar");
 			return this.authenticationManager;
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/MetricExportAutoConfigurationTests.java

@@ -39,9 +39,6 @@ import org.springframework.context.annotation.AnnotationConfigApplicationContext
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.integration.channel.FixedSubscriberChannel;
-import org.springframework.messaging.Message;
-import org.springframework.messaging.MessageHandler;
-import org.springframework.messaging.MessagingException;
 import org.springframework.messaging.SubscribableChannel;
 import org.springframework.scheduling.annotation.SchedulingConfigurer;
 import org.springframework.test.util.ReflectionTestUtils;
@@ -169,12 +166,7 @@ public class MetricExportAutoConfigurationTests {
 
 		@Bean
 		public SubscribableChannel metricsChannel() {
-			return new FixedSubscriberChannel(new MessageHandler() {
-
-				@Override
-				public void handleMessage(Message<?> message) throws MessagingException {
-				}
-
+			return new FixedSubscriberChannel((message) -> {
 			});
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/MetricFilterAutoConfigurationTests.java

@@ -26,8 +26,6 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.junit.Test;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.boot.actuate.metrics.CounterService;
 import org.springframework.boot.actuate.metrics.GaugeService;
@@ -100,12 +98,9 @@ public class MetricFilterAutoConfigurationTests {
 				"/test/path");
 		final MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain chain = mock(FilterChain.class);
-		willAnswer(new Answer<Object>() {
-			@Override
-			public Object answer(InvocationOnMock invocation) throws Throwable {
-				response.setStatus(200);
-				return null;
-			}
+		willAnswer((invocation) -> {
+			response.setStatus(200);
+			return null;
 		}).given(chain).doFilter(request, response);
 		filter.doFilter(request, response, chain);
 		verify(context.getBean(CounterService.class)).increment("status.200.test.path");
@@ -364,12 +359,9 @@ public class MetricFilterAutoConfigurationTests {
 				"/test/path");
 		final MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain chain = mock(FilterChain.class);
-		willAnswer(new Answer<Object>() {
-			@Override
-			public Object answer(InvocationOnMock invocation) throws Throwable {
-				response.setStatus(200);
-				return null;
-			}
+		willAnswer((invocation) -> {
+			response.setStatus(200);
+			return null;
 		}).given(chain).doFilter(request, response);
 		filter.doFilter(request, response, chain);
 		verify(context.getBean(GaugeService.class)).submit(eq("response.test.path"),
@@ -395,12 +387,9 @@ public class MetricFilterAutoConfigurationTests {
 				"/test/path");
 		final MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain chain = mock(FilterChain.class);
-		willAnswer(new Answer<Object>() {
-			@Override
-			public Object answer(InvocationOnMock invocation) throws Throwable {
-				response.setStatus(200);
-				return null;
-			}
+		willAnswer((invocation) -> {
+			response.setStatus(200);
+			return null;
 		}).given(chain).doFilter(request, response);
 		filter.doFilter(request, response, chain);
 		verify(context.getBean(GaugeService.class), never()).submit(anyString(),
@@ -420,13 +409,10 @@ public class MetricFilterAutoConfigurationTests {
 				"/test/path");
 		final MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain chain = mock(FilterChain.class);
-		willAnswer(new Answer<Object>() {
-			@Override
-			public Object answer(InvocationOnMock invocation) throws Throwable {
-				response.setStatus(200);
-				response.setCommitted(true);
-				throw new IOException();
-			}
+		willAnswer((invocation) -> {
+			response.setStatus(200);
+			response.setCommitted(true);
+			throw new IOException();
 		}).given(chain).doFilter(request, response);
 		try {
 			filter.doFilter(request, response, chain);
@@ -505,16 +491,12 @@ public class MetricFilterAutoConfigurationTests {
 		@RequestMapping("create")
 		public DeferredResult<ResponseEntity<String>> create() {
 			final DeferredResult<ResponseEntity<String>> result = new DeferredResult<>();
-			new Thread(new Runnable() {
-				@Override
-				public void run() {
-					try {
-						MetricFilterTestController.this.latch.await();
-						result.setResult(
-								new ResponseEntity<>("Done", HttpStatus.CREATED));
-					}
-					catch (InterruptedException ex) {
-					}
+			new Thread(() -> {
+				try {
+					MetricFilterTestController.this.latch.await();
+					result.setResult(new ResponseEntity<>("Done", HttpStatus.CREATED));
+				}
+				catch (InterruptedException ex) {
 				}
 			}).start();
 			return result;
@@ -523,16 +505,12 @@ public class MetricFilterAutoConfigurationTests {
 		@RequestMapping("createFailure")
 		public DeferredResult<ResponseEntity<String>> createFailure() {
 			final DeferredResult<ResponseEntity<String>> result = new DeferredResult<>();
-			new Thread(new Runnable() {
-				@Override
-				public void run() {
-					try {
-						MetricFilterTestController.this.latch.await();
-						result.setErrorResult(new Exception("It failed"));
-					}
-					catch (InterruptedException ex) {
-
-					}
+			new Thread(() -> {
+				try {
+					MetricFilterTestController.this.latch.await();
+					result.setErrorResult(new Exception("It failed"));
+				}
+				catch (InterruptedException ex) {
 				}
 			}).start();
 			return result;

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/PublicMetricsAutoConfigurationTests.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.autoconfigure;
 
-import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.Collection;
 import java.util.Collections;
@@ -54,7 +53,6 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Primary;
 import org.springframework.core.annotation.Order;
-import org.springframework.dao.DataAccessException;
 import org.springframework.jdbc.core.ConnectionCallback;
 import org.springframework.jdbc.core.JdbcTemplate;
 
@@ -140,18 +138,10 @@ public class PublicMetricsAutoConfigurationTests {
 		Collection<Metric<?>> metrics = bean.metrics();
 		assertMetrics(metrics, "datasource.tomcat.active", "datasource.tomcat.usage",
 				"datasource.commonsDbcp.active", "datasource.commonsDbcp.usage");
-
 		// Hikari won't work unless a first connection has been retrieved
 		JdbcTemplate jdbcTemplate = new JdbcTemplate(
 				this.context.getBean("hikariDS", DataSource.class));
-		jdbcTemplate.execute(new ConnectionCallback<Void>() {
-			@Override
-			public Void doInConnection(Connection connection)
-					throws SQLException, DataAccessException {
-				return null;
-			}
-		});
-
+		jdbcTemplate.execute((ConnectionCallback<Void>) (connection) -> null);
 		Collection<Metric<?>> anotherMetrics = bean.metrics();
 		assertMetrics(anotherMetrics, "datasource.tomcat.active",
 				"datasource.tomcat.usage", "datasource.hikariDS.active",

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/cloudfoundry/CloudFoundryEndpointHandlerMappingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,6 @@ import org.springframework.boot.actuate.endpoint.mvc.AbstractEndpointHandlerMapp
 import org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter;
 import org.springframework.boot.actuate.endpoint.mvc.HalJsonMvcEndpoint;
 import org.springframework.boot.actuate.endpoint.mvc.HealthMvcEndpoint;
-import org.springframework.boot.actuate.endpoint.mvc.ManagementServletContext;
 import org.springframework.boot.actuate.endpoint.mvc.NamedMvcEndpoint;
 import org.springframework.boot.actuate.health.HealthIndicator;
 import org.springframework.boot.actuate.health.OrderedHealthAggregator;
@@ -118,14 +117,7 @@ public class CloudFoundryEndpointHandlerMappingTests
 	private static class TestHalJsonMvcEndpoint extends HalJsonMvcEndpoint {
 
 		TestHalJsonMvcEndpoint() {
-			super(new ManagementServletContext() {
-
-				@Override
-				public String getContextPath() {
-					return "";
-				}
-
-			});
+			super(() -> "");
 		}
 
 	}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/HealthEndpointTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -61,13 +61,7 @@ public class HealthEndpointTests extends AbstractEndpointTests<HealthEndpoint> {
 
 		@Bean
 		public HealthIndicator statusHealthIndicator() {
-			return new HealthIndicator() {
-
-				@Override
-				public Health health() {
-					return new Health.Builder().status("FINE").build();
-				}
-			};
+			return () -> new Health.Builder().status("FINE").build();
 		}
 
 		@Bean

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/InfoEndpointTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,6 @@ import java.util.Map;
 
 import org.junit.Test;
 
-import org.springframework.boot.actuate.info.Info;
 import org.springframework.boot.actuate.info.InfoContributor;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
@@ -54,14 +53,7 @@ public class InfoEndpointTests extends AbstractEndpointTests<InfoEndpoint> {
 
 		@Bean
 		public InfoContributor infoContributor() {
-			return new InfoContributor() {
-
-				@Override
-				public void contribute(Info.Builder builder) {
-					builder.withDetail("key1", "value1");
-				}
-
-			};
+			return (builder) -> builder.withDetail("key1", "value1");
 		}
 
 		@Bean

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/MetricsEndpointTests.java

@@ -100,14 +100,8 @@ public class MetricsEndpointTests extends AbstractEndpointTests<MetricsEndpoint>
 
 		@Bean
 		public MetricsEndpoint endpoint() {
-			final Metric<Float> metric = new Metric<>("a", 0.5f);
-			PublicMetrics metrics = new PublicMetrics() {
-				@Override
-				public Collection<Metric<?>> metrics() {
-					return Collections.<Metric<?>>singleton(metric);
-				}
-			};
-			return new MetricsEndpoint(metrics);
+			Metric<?> metric = new Metric<>("a", 0.5f);
+			return new MetricsEndpoint(() -> Collections.singleton(metric));
 		}
 
 	}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/ShutdownEndpointTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -88,15 +88,10 @@ public class ShutdownEndpointTests extends AbstractEndpointTests<ShutdownEndpoin
 
 		@Bean
 		public ApplicationListener<ContextClosedEvent> listener() {
-			return new ApplicationListener<ContextClosedEvent>() {
-
-				@Override
-				public void onApplicationEvent(ContextClosedEvent event) {
-					Config.this.threadContextClassLoader = Thread.currentThread()
-							.getContextClassLoader();
-					Config.this.latch.countDown();
-				}
-
+			return (event) -> {
+				this.threadContextClassLoader = Thread.currentThread()
+						.getContextClassLoader();
+				this.latch.countDown();
 			};
 
 		}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/ShutdownParentEndpointTests.java

@@ -89,12 +89,7 @@ public class ShutdownParentEndpointTests {
 
 		@Bean
 		public ApplicationListener<ContextClosedEvent> listener() {
-			return new ApplicationListener<ContextClosedEvent>() {
-				@Override
-				public void onApplicationEvent(ContextClosedEvent event) {
-					Config.this.latch.countDown();
-				}
-			};
+			return (event) -> this.latch.countDown();
 
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/HeapdumpMvcEndpointSecureOptionsTests.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.endpoint.mvc;
 
-import java.io.File;
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
 
@@ -110,24 +109,17 @@ public class HeapdumpMvcEndpointSecureOptionsTests {
 
 		@Override
 		protected HeapDumper createHeapDumper() {
-			return new HeapDumper() {
-
-				@Override
-				public void dumpHeap(File file, boolean live)
-						throws IOException, InterruptedException {
-					if (!TestHeapdumpMvcEndpoint.this.available) {
-						throw new HeapDumperUnavailableException("Not available", null);
-					}
-					if (TestHeapdumpMvcEndpoint.this.locked) {
-						throw new InterruptedException();
-					}
-					if (file.exists()) {
-						throw new IOException("File exists");
-					}
-					FileCopyUtils.copy(TestHeapdumpMvcEndpoint.this.heapDump.getBytes(),
-							file);
+			return (file, live) -> {
+				if (!TestHeapdumpMvcEndpoint.this.available) {
+					throw new HeapDumperUnavailableException("Not available", null);
 				}
-
+				if (TestHeapdumpMvcEndpoint.this.locked) {
+					throw new InterruptedException();
+				}
+				if (file.exists()) {
+					throw new IOException("File exists");
+				}
+				FileCopyUtils.copy(this.heapDump.getBytes(), file);
 			};
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/HeapdumpMvcEndpointTests.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.endpoint.mvc;
 
-import java.io.File;
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
 import java.util.zip.GZIPInputStream;
@@ -150,24 +149,17 @@ public class HeapdumpMvcEndpointTests {
 
 		@Override
 		protected HeapDumper createHeapDumper() {
-			return new HeapDumper() {
-
-				@Override
-				public void dumpHeap(File file, boolean live)
-						throws IOException, InterruptedException {
-					if (!TestHeapdumpMvcEndpoint.this.available) {
-						throw new HeapDumperUnavailableException("Not available", null);
-					}
-					if (TestHeapdumpMvcEndpoint.this.locked) {
-						throw new InterruptedException();
-					}
-					if (file.exists()) {
-						throw new IOException("File exists");
-					}
-					FileCopyUtils.copy(TestHeapdumpMvcEndpoint.this.heapDump.getBytes(),
-							file);
+			return (file, live) -> {
+				if (!TestHeapdumpMvcEndpoint.this.available) {
+					throw new HeapDumperUnavailableException("Not available", null);
 				}
-
+				if (TestHeapdumpMvcEndpoint.this.locked) {
+					throw new InterruptedException();
+				}
+				if (file.exists()) {
+					throw new IOException("File exists");
+				}
+				FileCopyUtils.copy(this.heapDump.getBytes(), file);
 			};
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/InfoMvcEndpointTests.java

@@ -28,7 +28,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.autoconfigure.AuditAutoConfiguration;
 import org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration;
 import org.springframework.boot.actuate.endpoint.InfoEndpoint;
-import org.springframework.boot.actuate.info.Info;
 import org.springframework.boot.actuate.info.InfoContributor;
 import org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration;
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
@@ -110,28 +109,21 @@ public class InfoMvcEndpointTests {
 
 		@Bean
 		public InfoContributor beanName1() {
-			return new InfoContributor() {
-
-				@Override
-				public void contribute(Info.Builder builder) {
-					Map<String, Object> content = new LinkedHashMap<>();
-					content.put("key11", "value11");
-					content.put("key12", "value12");
-					builder.withDetail("beanName1", content);
-				}
+			return (builder) -> {
+				Map<String, Object> content = new LinkedHashMap<>();
+				content.put("key11", "value11");
+				content.put("key12", "value12");
+				builder.withDetail("beanName1", content);
 			};
 		}
 
 		@Bean
 		public InfoContributor beanName2() {
-			return new InfoContributor() {
-				@Override
-				public void contribute(Info.Builder builder) {
-					Map<String, Object> content = new LinkedHashMap<>();
-					content.put("key21", "value21");
-					content.put("key22", "value22");
-					builder.withDetail("beanName2", content);
-				}
+			return (builder) -> {
+				Map<String, Object> content = new LinkedHashMap<>();
+				content.put("key21", "value21");
+				content.put("key22", "value22");
+				builder.withDetail("beanName2", content);
 			};
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/MetricsMvcEndpointTests.java

@@ -17,7 +17,6 @@
 package org.springframework.boot.actuate.endpoint.mvc;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 
 import org.junit.Before;
@@ -28,7 +27,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.autoconfigure.AuditAutoConfiguration;
 import org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration;
 import org.springframework.boot.actuate.endpoint.MetricsEndpoint;
-import org.springframework.boot.actuate.endpoint.PublicMetrics;
 import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration;
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
@@ -182,21 +180,16 @@ public class MetricsMvcEndpointTests {
 
 		@Bean
 		public MetricsEndpoint endpoint() {
-			return new MetricsEndpoint(new PublicMetrics() {
-
-				@Override
-				public Collection<Metric<?>> metrics() {
-					ArrayList<Metric<?>> metrics = new ArrayList<>();
-					metrics.add(new Metric<>("foo", 1));
-					metrics.add(new Metric<>("bar.png", 1));
-					metrics.add(new Metric<>("group1.a", 1));
-					metrics.add(new Metric<>("group1.b", 1));
-					metrics.add(new Metric<>("group2.a", 1));
-					metrics.add(new Metric<>("group2_a", 1));
-					metrics.add(new Metric<Integer>("baz", null));
-					return Collections.unmodifiableList(metrics);
-				}
-
+			return new MetricsEndpoint(() -> {
+				ArrayList<Metric<?>> metrics = new ArrayList<>();
+				metrics.add(new Metric<>("foo", 1));
+				metrics.add(new Metric<>("bar.png", 1));
+				metrics.add(new Metric<>("group1.a", 1));
+				metrics.add(new Metric<>("group1.b", 1));
+				metrics.add(new Metric<>("group2.a", 1));
+				metrics.add(new Metric<>("group2_a", 1));
+				metrics.add(new Metric<Integer>("baz", null));
+				return Collections.unmodifiableList(metrics);
 			});
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/NoSpringSecurityHealthMvcEndpointIntegrationTests.java

@@ -36,7 +36,6 @@ import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockServletContext;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.RequestPostProcessor;
@@ -93,16 +92,10 @@ public class NoSpringSecurityHealthMvcEndpointIntegrationTests {
 	}
 
 	private RequestPostProcessor getRequestPostProcessor() {
-		return new RequestPostProcessor() {
-
-			@Override
-			public MockHttpServletRequest postProcessRequest(
-					MockHttpServletRequest request) {
-				Principal principal = mock(Principal.class);
-				request.setUserPrincipal(principal);
-				return request;
-			}
-
+		return (request) -> {
+			Principal principal = mock(Principal.class);
+			request.setUserPrincipal(principal);
+			return request;
 		};
 	}
 
@@ -115,14 +108,7 @@ public class NoSpringSecurityHealthMvcEndpointIntegrationTests {
 
 		@Bean
 		public HealthIndicator testHealthIndicator() {
-			return new HealthIndicator() {
-
-				@Override
-				public Health health() {
-					return Health.up().withDetail("hello", "world").build();
-				}
-
-			};
+			return () -> Health.up().withDetail("hello", "world").build();
 		}
 
 	}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/ShutdownMvcEndpointTests.java

@@ -22,8 +22,6 @@ import java.util.concurrent.TimeUnit;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -123,14 +121,9 @@ public class ShutdownMvcEndpointTests {
 				throws BeansException {
 			ConfigurableApplicationContext mockContext = mock(
 					ConfigurableApplicationContext.class);
-			willAnswer(new Answer<Void>() {
-
-				@Override
-				public Void answer(InvocationOnMock invocation) throws Throwable {
-					TestShutdownEndpoint.this.contextCloseLatch.countDown();
-					return null;
-				}
-
+			willAnswer((invocation) -> {
+				TestShutdownEndpoint.this.contextCloseLatch.countDown();
+				return null;
 			}).given(mockContext).close();
 			super.setApplicationContext(mockContext);
 		}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/BufferGaugeServiceSpeedTests.java

@@ -26,8 +26,6 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.DoubleAdder;
 import java.util.concurrent.atomic.LongAdder;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
 import java.util.regex.Pattern;
 
 import org.junit.AfterClass;
@@ -38,7 +36,6 @@ import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.metrics.GaugeService;
-import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.util.StopWatch;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -79,7 +76,7 @@ public class BufferGaugeServiceSpeedTests {
 	@BeforeClass
 	public static void prime() throws FileNotFoundException {
 		err = new NullPrintWriter();
-		final Random random = new Random();
+		Random random = new Random();
 		for (int i = 0; i < 1000; i++) {
 			sample[i] = names[random.nextInt(names.length)];
 		}
@@ -98,21 +95,11 @@ public class BufferGaugeServiceSpeedTests {
 		watch.start("readRaw" + count);
 		for (String name : names) {
 			this.gauges.forEach(Pattern.compile(name).asPredicate(),
-					new BiConsumer<String, GaugeBuffer>() {
-						@Override
-						public void accept(String name, GaugeBuffer value) {
-							err.println(name + "=" + value);
-						}
-					});
+					(key, value) -> err.println(key + "=" + value));
 		}
-		final DoubleAdder total = new DoubleAdder();
+		DoubleAdder total = new DoubleAdder();
 		this.gauges.forEach(Pattern.compile(".*").asPredicate(),
-				new BiConsumer<String, GaugeBuffer>() {
-					@Override
-					public void accept(String name, GaugeBuffer value) {
-						total.add(value.getValue());
-					}
-				});
+				(name, value) -> total.add(value.getValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(number * threadCount < total.longValue()).isTrue();
@@ -124,19 +111,9 @@ public class BufferGaugeServiceSpeedTests {
 		double rate = number / watch.getLastTaskTimeMillis() * 1000;
 		System.err.println("Rate(" + count + ")=" + rate + ", " + watch);
 		watch.start("readReader" + count);
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> metric) {
-				err.println(metric);
-			}
-		});
-		final LongAdder total = new LongAdder();
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> value) {
-				total.add(value.getValue().intValue());
-			}
-		});
+		this.reader.findAll().forEach((metric) -> err.println(metric));
+		LongAdder total = new LongAdder();
+		this.reader.findAll().forEach((value) -> total.add(value.getValue().intValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(0 < total.longValue()).isTrue();
@@ -145,13 +122,10 @@ public class BufferGaugeServiceSpeedTests {
 	private void iterate(String taskName) throws Exception {
 		watch.start(taskName + count++);
 		ExecutorService pool = Executors.newFixedThreadPool(threadCount);
-		Runnable task = new Runnable() {
-			@Override
-			public void run() {
-				for (int i = 0; i < number; i++) {
-					String name = sample[i % sample.length];
-					BufferGaugeServiceSpeedTests.this.service.submit(name, count + i);
-				}
+		Runnable task = () -> {
+			for (int i = 0; i < number; i++) {
+				String name = sample[i % sample.length];
+				BufferGaugeServiceSpeedTests.this.service.submit(name, count + i);
 			}
 		};
 		Collection<Future<?>> futures = new HashSet<>();

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/CounterBuffersTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.boot.actuate.metrics.buffer;
 
-import java.util.function.Consumer;
-
 import org.junit.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -36,23 +34,15 @@ public class CounterBuffersTests {
 	@Test
 	public void inAndOut() {
 		this.buffers.increment("foo", 2);
-		this.buffers.doWith("foo", new Consumer<CounterBuffer>() {
-			@Override
-			public void accept(CounterBuffer buffer) {
-				CounterBuffersTests.this.value = buffer.getValue();
-			}
-		});
+		this.buffers.doWith("foo",
+				(buffer) -> CounterBuffersTests.this.value = buffer.getValue());
 		assertThat(this.value).isEqualTo(2);
 	}
 
 	@Test
 	public void getNonExistent() {
-		this.buffers.doWith("foo", new Consumer<CounterBuffer>() {
-			@Override
-			public void accept(CounterBuffer buffer) {
-				CounterBuffersTests.this.value = buffer.getValue();
-			}
-		});
+		this.buffers.doWith("foo",
+				(buffer) -> CounterBuffersTests.this.value = buffer.getValue());
 		assertThat(this.value).isEqualTo(0);
 	}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/CounterServiceSpeedTests.java

@@ -25,8 +25,6 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.LongAdder;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
 import java.util.regex.Pattern;
 
 import org.junit.AfterClass;
@@ -37,7 +35,6 @@ import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.metrics.CounterService;
-import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.util.StopWatch;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -78,7 +75,7 @@ public class CounterServiceSpeedTests {
 	@BeforeClass
 	public static void prime() throws FileNotFoundException {
 		err = new NullPrintWriter();
-		final Random random = new Random();
+		Random random = new Random();
 		for (int i = 0; i < 1000; i++) {
 			sample[i] = names[random.nextInt(names.length)];
 		}
@@ -97,21 +94,11 @@ public class CounterServiceSpeedTests {
 		watch.start("readRaw" + count);
 		for (String name : names) {
 			this.counters.forEach(Pattern.compile(name).asPredicate(),
-					new BiConsumer<String, CounterBuffer>() {
-						@Override
-						public void accept(String name, CounterBuffer value) {
-							err.println(name + "=" + value);
-						}
-					});
+					(key, value) -> err.println(key + "=" + value));
 		}
-		final LongAdder total = new LongAdder();
+		LongAdder total = new LongAdder();
 		this.counters.forEach(Pattern.compile(".*").asPredicate(),
-				new BiConsumer<String, CounterBuffer>() {
-					@Override
-					public void accept(String name, CounterBuffer value) {
-						total.add(value.getValue());
-					}
-				});
+				(name, value) -> total.add(value.getValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(total.longValue()).isEqualTo(number * threadCount);
@@ -123,19 +110,9 @@ public class CounterServiceSpeedTests {
 		double rate = number / watch.getLastTaskTimeMillis() * 1000;
 		System.err.println("Rate(" + count + ")=" + rate + ", " + watch);
 		watch.start("readReader" + count);
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> metric) {
-				err.println(metric);
-			}
-		});
-		final LongAdder total = new LongAdder();
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> value) {
-				total.add(value.getValue().intValue());
-			}
-		});
+		this.reader.findAll().forEach(err::println);
+		LongAdder total = new LongAdder();
+		this.reader.findAll().forEach((value) -> total.add(value.getValue().intValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(total.longValue()).isEqualTo(number * threadCount);
@@ -144,13 +121,10 @@ public class CounterServiceSpeedTests {
 	private void iterate(String taskName) throws Exception {
 		watch.start(taskName + count++);
 		ExecutorService pool = Executors.newFixedThreadPool(threadCount);
-		Runnable task = new Runnable() {
-			@Override
-			public void run() {
-				for (int i = 0; i < number; i++) {
-					String name = sample[i % sample.length];
-					CounterServiceSpeedTests.this.service.increment(name);
-				}
+		Runnable task = () -> {
+			for (int i = 0; i < number; i++) {
+				String name = sample[i % sample.length];
+				CounterServiceSpeedTests.this.service.increment(name);
 			}
 		};
 		Collection<Future<?>> futures = new HashSet<>();

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/DefaultCounterServiceSpeedTests.java

@@ -25,7 +25,6 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.LongAdder;
-import java.util.function.Consumer;
 
 import org.junit.BeforeClass;
 import org.junit.experimental.theories.DataPoints;
@@ -34,7 +33,6 @@ import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.metrics.CounterService;
-import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.actuate.metrics.reader.MetricReader;
 import org.springframework.boot.actuate.metrics.repository.InMemoryMetricRepository;
 import org.springframework.boot.actuate.metrics.writer.DefaultCounterService;
@@ -87,13 +85,10 @@ public class DefaultCounterServiceSpeedTests {
 	public void counters(String input) throws Exception {
 		watch.start("counters" + count++);
 		ExecutorService pool = Executors.newFixedThreadPool(threadCount);
-		Runnable task = new Runnable() {
-			@Override
-			public void run() {
-				for (int i = 0; i < number; i++) {
-					String name = sample[i % sample.length];
-					DefaultCounterServiceSpeedTests.this.counterService.increment(name);
-				}
+		Runnable task = () -> {
+			for (int i = 0; i < number; i++) {
+				String name = sample[i % sample.length];
+				DefaultCounterServiceSpeedTests.this.counterService.increment(name);
 			}
 		};
 		Collection<Future<?>> futures = new HashSet<>();
@@ -107,19 +102,9 @@ public class DefaultCounterServiceSpeedTests {
 		double rate = number / watch.getLastTaskTimeMillis() * 1000;
 		System.err.println("Counters rate(" + count + ")=" + rate + ", " + watch);
 		watch.start("read" + count);
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> metric) {
-				err.println(metric);
-			}
-		});
-		final LongAdder total = new LongAdder();
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> value) {
-				total.add(value.getValue().intValue());
-			}
-		});
+		this.reader.findAll().forEach(err::println);
+		LongAdder total = new LongAdder();
+		this.reader.findAll().forEach((value) -> total.add(value.getValue().intValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(total.longValue()).isEqualTo(number * threadCount);

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/DefaultGaugeServiceSpeedTests.java

@@ -25,7 +25,6 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.LongAdder;
-import java.util.function.Consumer;
 
 import org.junit.BeforeClass;
 import org.junit.experimental.theories.DataPoints;
@@ -34,7 +33,6 @@ import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.metrics.GaugeService;
-import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.actuate.metrics.reader.MetricReader;
 import org.springframework.boot.actuate.metrics.repository.InMemoryMetricRepository;
 import org.springframework.boot.actuate.metrics.writer.DefaultGaugeService;
@@ -77,7 +75,7 @@ public class DefaultGaugeServiceSpeedTests {
 	@BeforeClass
 	public static void prime() throws FileNotFoundException {
 		err = new NullPrintWriter();
-		final Random random = new Random();
+		Random random = new Random();
 		for (int i = 0; i < 1000; i++) {
 			sample[i] = names[random.nextInt(names.length)];
 		}
@@ -87,14 +85,10 @@ public class DefaultGaugeServiceSpeedTests {
 	public void gauges(String input) throws Exception {
 		watch.start("gauges" + count++);
 		ExecutorService pool = Executors.newFixedThreadPool(threadCount);
-		Runnable task = new Runnable() {
-			@Override
-			public void run() {
-				for (int i = 0; i < number; i++) {
-					String name = sample[i % sample.length];
-					DefaultGaugeServiceSpeedTests.this.gaugeService.submit(name,
-							count + i);
-				}
+		Runnable task = () -> {
+			for (int i = 0; i < number; i++) {
+				String name = sample[i % sample.length];
+				DefaultGaugeServiceSpeedTests.this.gaugeService.submit(name, count + i);
 			}
 		};
 		Collection<Future<?>> futures = new HashSet<>();
@@ -108,19 +102,9 @@ public class DefaultGaugeServiceSpeedTests {
 		double rate = number / watch.getLastTaskTimeMillis() * 1000;
 		System.err.println("Gauges rate(" + count + ")=" + rate + ", " + watch);
 		watch.start("read" + count);
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> metric) {
-				err.println(metric);
-			}
-		});
-		final LongAdder total = new LongAdder();
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> value) {
-				total.add(value.getValue().intValue());
-			}
-		});
+		this.reader.findAll().forEach(err::println);
+		LongAdder total = new LongAdder();
+		this.reader.findAll().forEach((value) -> total.add(value.getValue().intValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(0 < total.longValue()).isTrue();

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/DropwizardCounterServiceSpeedTests.java

@@ -25,7 +25,6 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.LongAdder;
-import java.util.function.Consumer;
 
 import com.codahale.metrics.MetricRegistry;
 import org.junit.BeforeClass;
@@ -35,7 +34,6 @@ import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
 
 import org.springframework.boot.actuate.metrics.CounterService;
-import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.boot.actuate.metrics.dropwizard.DropwizardMetricServices;
 import org.springframework.boot.actuate.metrics.reader.MetricReader;
 import org.springframework.boot.actuate.metrics.reader.MetricRegistryMetricReader;
@@ -79,7 +77,7 @@ public class DropwizardCounterServiceSpeedTests {
 	@BeforeClass
 	public static void prime() throws FileNotFoundException {
 		err = new NullPrintWriter();
-		final Random random = new Random();
+		Random random = new Random();
 		for (int i = 0; i < 1000; i++) {
 			sample[i] = names[random.nextInt(names.length)];
 		}
@@ -89,14 +87,10 @@ public class DropwizardCounterServiceSpeedTests {
 	public void counters(String input) throws Exception {
 		watch.start("counters" + count++);
 		ExecutorService pool = Executors.newFixedThreadPool(threadCount);
-		Runnable task = new Runnable() {
-			@Override
-			public void run() {
-				for (int i = 0; i < number; i++) {
-					String name = sample[i % sample.length];
-					DropwizardCounterServiceSpeedTests.this.counterService
-							.increment(name);
-				}
+		Runnable task = () -> {
+			for (int i = 0; i < number; i++) {
+				String name = sample[i % sample.length];
+				DropwizardCounterServiceSpeedTests.this.counterService.increment(name);
 			}
 		};
 		Collection<Future<?>> futures = new HashSet<>();
@@ -110,19 +104,9 @@ public class DropwizardCounterServiceSpeedTests {
 		double rate = number / watch.getLastTaskTimeMillis() * 1000;
 		System.err.println("Counters rate(" + count + ")=" + rate + ", " + watch);
 		watch.start("read" + count);
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> metric) {
-				err.println(metric);
-			}
-		});
-		final LongAdder total = new LongAdder();
-		this.reader.findAll().forEach(new Consumer<Metric<?>>() {
-			@Override
-			public void accept(Metric<?> value) {
-				total.add(value.getValue().intValue());
-			}
-		});
+		this.reader.findAll().forEach(err::println);
+		LongAdder total = new LongAdder();
+		this.reader.findAll().forEach((value) -> total.add(value.getValue().intValue()));
 		watch.stop();
 		System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
 		assertThat(total.longValue()).isEqualTo(number * threadCount);

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/reader/MetricRegistryMetricReaderTests.java

@@ -41,14 +41,7 @@ public class MetricRegistryMetricReaderTests {
 
 	@Test
 	public void nonNumberGaugesAreTolerated() {
-		this.metricRegistry.register("test", new Gauge<Set<String>>() {
-
-			@Override
-			public Set<String> getValue() {
-				return new HashSet<>();
-			}
-
-		});
+		this.metricRegistry.register("test", (Gauge<Set<String>>) HashSet::new);
 		assertThat(this.metricReader.findOne("test")).isNull();
 		this.metricRegistry.remove("test");
 		assertThat(this.metricReader.findOne("test")).isNull();
@@ -57,14 +50,7 @@ public class MetricRegistryMetricReaderTests {
 	@Test
 	@SuppressWarnings("unchecked")
 	public void numberGauge() {
-		this.metricRegistry.register("test", new Gauge<Number>() {
-
-			@Override
-			public Number getValue() {
-				return Integer.valueOf(5);
-			}
-
-		});
+		this.metricRegistry.register("test", (Gauge<Number>) () -> Integer.valueOf(5));
 		Metric<Integer> metric = (Metric<Integer>) this.metricReader.findOne("test");
 		assertThat(metric.getValue()).isEqualTo(Integer.valueOf(5));
 		this.metricRegistry.remove("test");

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/util/SimpleInMemoryRepositoryTests.java

@@ -27,8 +27,6 @@ import java.util.concurrent.TimeUnit;
 
 import org.junit.Test;
 
-import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository.Callback;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -49,23 +47,13 @@ public class SimpleInMemoryRepositoryTests {
 	@Test
 	public void updateExisting() {
 		this.repository.set("foo", "spam");
-		this.repository.update("foo", new Callback<String>() {
-			@Override
-			public String modify(String current) {
-				return "bar";
-			}
-		});
+		this.repository.update("foo", (current) -> "bar");
 		assertThat(this.repository.findOne("foo")).isEqualTo("bar");
 	}
 
 	@Test
 	public void updateNonexistent() {
-		this.repository.update("foo", new Callback<String>() {
-			@Override
-			public String modify(String current) {
-				return "bar";
-			}
-		});
+		this.repository.update("foo", (current) -> "bar");
 		assertThat(this.repository.findOne("foo")).isEqualTo("bar");
 	}
 
@@ -114,16 +102,11 @@ public class SimpleInMemoryRepositoryTests {
 
 		@Override
 		public Boolean call() throws Exception {
-			this.repository.update("foo", new Callback<Integer>() {
-
-				@Override
-				public Integer modify(Integer current) {
-					if (current == null) {
-						return RepositoryUpdate.this.delta;
-					}
-					return current + RepositoryUpdate.this.delta;
+			this.repository.update("foo", (current) -> {
+				if (current == null) {
+					return RepositoryUpdate.this.delta;
 				}
-
+				return current + RepositoryUpdate.this.delta;
 			});
 			return true;
 		}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/writer/MessageChannelMetricWriterTests.java

@@ -20,8 +20,6 @@ import org.junit.Before;
 import org.junit.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.boot.actuate.metrics.Metric;
 import org.springframework.messaging.Message;
@@ -51,15 +49,10 @@ public class MessageChannelMetricWriterTests {
 	@Before
 	public void setup() {
 		MockitoAnnotations.initMocks(this);
-		given(this.channel.send(any(Message.class))).willAnswer(new Answer<Object>() {
-
-			@Override
-			public Object answer(InvocationOnMock invocation) throws Throwable {
-				MessageChannelMetricWriterTests.this.handler
-						.handleMessage(invocation.getArgument(0));
-				return true;
-			}
-
+		given(this.channel.send(any(Message.class))).willAnswer((invocation) -> {
+			MessageChannelMetricWriterTests.this.handler
+					.handleMessage(invocation.getArgument(0));
+			return true;
 		});
 		this.writer = new MessageChannelMetricWriter(this.channel);
 		this.handler = new MetricWriterMessageHandler(this.observer);

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/servlet/MockServletWebServerFactory.java

@@ -69,7 +69,7 @@ public class MockServletWebServerFactory extends AbstractServletWebServerFactory
 
 		public MockServletWebServer(ServletContextInitializer[] initializers, int port) {
 			super(Arrays.stream(initializers)
-					.map((i) -> (Initializer) (s) -> i.onStartup(s))
+					.map((initializer) -> (Initializer) initializer::onStartup)
 					.toArray(Initializer[]::new), port);
 		}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/trace/WebRequestTraceFilterTests.java

@@ -24,10 +24,7 @@ import java.util.Collections;
 import java.util.EnumSet;
 import java.util.Map;
 
-import javax.servlet.FilterChain;
 import javax.servlet.ServletException;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
 
 import org.junit.Test;
 
@@ -93,30 +90,17 @@ public class WebRequestTraceFilterTests {
 		request.setPathInfo(url);
 		tmp.deleteOnExit();
 		request.setAuthType("authType");
-		Principal principal = new Principal() {
-
-			@Override
-			public String getName() {
-				return "principalTest";
-			}
-
-		};
+		Principal principal = () -> "principalTest";
 		request.setUserPrincipal(principal);
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		response.addHeader("Content-Type", "application/json");
 		response.addHeader("Set-Cookie", "a=b");
-		this.filter.doFilterInternal(request, response, new FilterChain() {
-
-			@Override
-			public void doFilter(ServletRequest request, ServletResponse response)
-					throws IOException, ServletException {
-				BufferedReader bufferedReader = request.getReader();
-				while (bufferedReader.readLine() != null) {
-					// read the contents as normal (forces cache to fill up)
-				}
-				response.getWriter().println("Goodbye, World!");
+		this.filter.doFilterInternal(request, response, (req, resp) -> {
+			BufferedReader bufferedReader = req.getReader();
+			while (bufferedReader.readLine() != null) {
+				// read the contents as normal (forces cache to fill up)
 			}
-
+			resp.getWriter().println("Goodbye, World!");
 		});
 		assertThat(this.repository.findAll()).hasSize(1);
 		Map<String, Object> trace = this.repository.findAll().iterator().next().getInfo();
@@ -146,11 +130,7 @@ public class WebRequestTraceFilterTests {
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/foo");
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		response.addHeader("Content-Type", "application/json");
-		this.filter.doFilterInternal(request, response, new FilterChain() {
-			@Override
-			public void doFilter(ServletRequest request, ServletResponse response)
-					throws IOException, ServletException {
-			}
+		this.filter.doFilterInternal(request, response, (req, resp) -> {
 		});
 		Map<String, Object> info = this.repository.findAll().iterator().next().getInfo();
 		Map<String, Object> headers = (Map<String, Object>) info.get("headers");
@@ -177,13 +157,7 @@ public class WebRequestTraceFilterTests {
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/foo");
 		request.addHeader("Authorization", "my-auth-header");
 		MockHttpServletResponse response = new MockHttpServletResponse();
-		this.filter.doFilterInternal(request, response, new FilterChain() {
-
-			@Override
-			public void doFilter(ServletRequest request, ServletResponse response)
-					throws IOException, ServletException {
-			}
-
+		this.filter.doFilterInternal(request, response, (req, resp) -> {
 		});
 		Map<String, Object> info = this.repository.findAll().iterator().next().getInfo();
 		Map<String, Object> headers = (Map<String, Object>) info.get("headers");
@@ -199,13 +173,7 @@ public class WebRequestTraceFilterTests {
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/foo");
 		request.addHeader("Authorization", "my-auth-header");
 		MockHttpServletResponse response = new MockHttpServletResponse();
-		this.filter.doFilterInternal(request, response, new FilterChain() {
-
-			@Override
-			public void doFilter(ServletRequest request, ServletResponse response)
-					throws IOException, ServletException {
-			}
-
+		this.filter.doFilterInternal(request, response, (req, resp) -> {
 		});
 		Map<String, Object> info = this.repository.findAll().iterator().next().getInfo();
 		Map<String, Object> headers = (Map<String, Object>) info.get("headers");
@@ -279,14 +247,8 @@ public class WebRequestTraceFilterTests {
 		MockHttpServletResponse response = new MockHttpServletResponse();
 
 		try {
-			this.filter.doFilterInternal(request, response, new FilterChain() {
-
-				@Override
-				public void doFilter(ServletRequest request, ServletResponse response)
-						throws IOException, ServletException {
-					throw new RuntimeException();
-				}
-
+			this.filter.doFilterInternal(request, response, (req, resp) -> {
+				throw new RuntimeException();
 			});
 			fail("Exception was swallowed");
 		}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationSorter.java

@@ -20,7 +20,6 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.Comparator;
 import java.util.HashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -60,15 +59,10 @@ class AutoConfigurationSorter {
 		// Initially sort alphabetically
 		Collections.sort(orderedClassNames);
 		// Then sort by order
-		orderedClassNames.sort(new Comparator<String>() {
-
-			@Override
-			public int compare(String o1, String o2) {
-				int i1 = classes.get(o1).getOrder();
-				int i2 = classes.get(o2).getOrder();
-				return (i1 < i2) ? -1 : (i1 > i2) ? 1 : 0;
-			}
-
+		orderedClassNames.sort((o1, o2) -> {
+			int i1 = classes.get(o1).getOrder();
+			int i2 = classes.get(o2).getOrder();
+			return (i1 < i2) ? -1 : (i1 > i2) ? 1 : 0;
 		});
 		// Then respect @AutoConfigureBefore @AutoConfigureAfter
 		orderedClassNames = sortByAnnotation(classes, orderedClassNames);

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnClassCondition.java

@@ -253,15 +253,8 @@ class OnClassCondition extends SpringBootCondition
 		private volatile ConditionOutcome[] outcomes;
 
 		private ThreadedOutcomesResolver(final OutcomesResolver outcomesResolver) {
-			this.thread = new Thread(new Runnable() {
-
-				@Override
-				public void run() {
-					ThreadedOutcomesResolver.this.outcomes = outcomesResolver
-							.resolveOutcomes();
-				}
-
-			});
+			this.thread = new Thread(
+					() -> this.outcomes = outcomesResolver.resolveOutcomes());
 			this.thread.start();
 		}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/metadata/DataSourcePoolMetadataProvidersConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.boot.autoconfigure.jdbc.metadata;
 
-import javax.sql.DataSource;
-
 import com.zaxxer.hikari.HikariDataSource;
 import org.apache.commons.dbcp2.BasicDataSource;
 
@@ -41,16 +39,12 @@ public class DataSourcePoolMetadataProvidersConfiguration {
 
 		@Bean
 		public DataSourcePoolMetadataProvider tomcatPoolDataSourceMetadataProvider() {
-			return new DataSourcePoolMetadataProvider() {
-				@Override
-				public DataSourcePoolMetadata getDataSourcePoolMetadata(
-						DataSource dataSource) {
-					if (dataSource instanceof org.apache.tomcat.jdbc.pool.DataSource) {
-						return new TomcatDataSourcePoolMetadata(
-								(org.apache.tomcat.jdbc.pool.DataSource) dataSource);
-					}
-					return null;
+			return (dataSource) -> {
+				if (dataSource instanceof org.apache.tomcat.jdbc.pool.DataSource) {
+					return new TomcatDataSourcePoolMetadata(
+							(org.apache.tomcat.jdbc.pool.DataSource) dataSource);
 				}
+				return null;
 			};
 		}
 
@@ -62,16 +56,12 @@ public class DataSourcePoolMetadataProvidersConfiguration {
 
 		@Bean
 		public DataSourcePoolMetadataProvider hikariPoolDataSourceMetadataProvider() {
-			return new DataSourcePoolMetadataProvider() {
-				@Override
-				public DataSourcePoolMetadata getDataSourcePoolMetadata(
-						DataSource dataSource) {
-					if (dataSource instanceof HikariDataSource) {
-						return new HikariDataSourcePoolMetadata(
-								(HikariDataSource) dataSource);
-					}
-					return null;
+			return (dataSource) -> {
+				if (dataSource instanceof HikariDataSource) {
+					return new HikariDataSourcePoolMetadata(
+							(HikariDataSource) dataSource);
 				}
+				return null;
 			};
 		}
 
@@ -83,16 +73,12 @@ public class DataSourcePoolMetadataProvidersConfiguration {
 
 		@Bean
 		public DataSourcePoolMetadataProvider commonsDbcp2PoolDataSourceMetadataProvider() {
-			return new DataSourcePoolMetadataProvider() {
-				@Override
-				public DataSourcePoolMetadata getDataSourcePoolMetadata(
-						DataSource dataSource) {
-					if (dataSource instanceof BasicDataSource) {
-						return new CommonsDbcp2DataSourcePoolMetadata(
-								(BasicDataSource) dataSource);
-					}
-					return null;
+			return (dataSource) -> {
+				if (dataSource instanceof BasicDataSource) {
+					return new CommonsDbcp2DataSourcePoolMetadata(
+							(BasicDataSource) dataSource);
 				}
+				return null;
 			};
 		}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfiguration.java

@@ -243,13 +243,10 @@ public class JerseyAutoConfiguration implements ServletContextAware {
 		public ResourceConfigCustomizer resourceConfigCustomizer(
 				final ObjectMapper objectMapper) {
 			addJaxbAnnotationIntrospectorIfPresent(objectMapper);
-			return new ResourceConfigCustomizer() {
-				@Override
-				public void customize(ResourceConfig config) {
-					config.register(JacksonFeature.class);
-					config.register(new ObjectMapperContextResolver(objectMapper),
-							ContextResolver.class);
-				}
+			return (ResourceConfig config) -> {
+				config.register(JacksonFeature.class);
+				config.register(new ObjectMapperContextResolver(objectMapper),
+						ContextResolver.class);
 			};
 		}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/SpringBootWebSecurityConfiguration.java

@@ -20,8 +20,6 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import javax.servlet.http.HttpServletRequest;
-
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
@@ -230,12 +228,7 @@ public class SpringBootWebSecurityConfiguration {
 
 		@Override
 		protected void configure(HttpSecurity http) throws Exception {
-			http.requestMatcher(new RequestMatcher() {
-				@Override
-				public boolean matches(HttpServletRequest request) {
-					return false;
-				}
-			});
+			http.requestMatcher(request -> false);
 		}
 
 	}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/social/SocialWebAutoConfiguration.java

@@ -140,12 +140,7 @@ public class SocialWebAutoConfiguration {
 
 		@Override
 		public UserIdSource getUserIdSource() {
-			return new UserIdSource() {
-				@Override
-				public String getUserId() {
-					return "anonymous";
-				}
-			};
+			return () -> "anonymous";
 		}
 
 	}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/DefaultServletWebServerFactoryCustomizer.java

@@ -23,10 +23,7 @@ import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.SessionCookieConfig;
 
-import io.undertow.Undertow;
 import io.undertow.UndertowOptions;
-import org.apache.catalina.Context;
-import org.apache.catalina.connector.Connector;
 import org.apache.catalina.valves.AccessLogValve;
 import org.apache.catalina.valves.RemoteIpValve;
 import org.apache.coyote.AbstractProtocol;
@@ -47,10 +44,7 @@ import org.springframework.boot.autoconfigure.web.ServerProperties.Session;
 import org.springframework.boot.cloud.CloudPlatform;
 import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
 import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
-import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
-import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
-import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
 import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.boot.web.servlet.ServletContextInitializer;
@@ -269,49 +263,34 @@ public class DefaultServletWebServerFactoryCustomizer
 
 		private static void customizeAcceptCount(TomcatServletWebServerFactory factory,
 				final int acceptCount) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-
-				@Override
-				public void customize(Connector connector) {
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractProtocol) {
-						AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
-						protocol.setAcceptCount(acceptCount);
-					}
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractProtocol) {
+					AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
+					protocol.setAcceptCount(acceptCount);
 				}
-
 			});
 		}
 
 		private static void customizeMaxConnections(TomcatServletWebServerFactory factory,
 				final int maxConnections) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-
-				@Override
-				public void customize(Connector connector) {
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractProtocol) {
-						AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
-						protocol.setMaxConnections(maxConnections);
-					}
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractProtocol) {
+					AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
+					protocol.setMaxConnections(maxConnections);
 				}
-
 			});
 		}
 
 		private static void customizeConnectionTimeout(
 				TomcatServletWebServerFactory factory, final int connectionTimeout) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-
-				@Override
-				public void customize(Connector connector) {
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractProtocol) {
-						AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
-						protocol.setConnectionTimeout(connectionTimeout);
-					}
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractProtocol) {
+					AbstractProtocol<?> protocol = (AbstractProtocol<?>) handler;
+					protocol.setConnectionTimeout(connectionTimeout);
 				}
-
 			});
 		}
 
@@ -342,16 +321,11 @@ public class DefaultServletWebServerFactoryCustomizer
 		@SuppressWarnings("rawtypes")
 		private static void customizeMaxThreads(TomcatServletWebServerFactory factory,
 				final int maxThreads) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-				@Override
-				public void customize(Connector connector) {
-
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractProtocol) {
-						AbstractProtocol protocol = (AbstractProtocol) handler;
-						protocol.setMaxThreads(maxThreads);
-					}
-
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractProtocol) {
+					AbstractProtocol protocol = (AbstractProtocol) handler;
+					protocol.setMaxThreads(maxThreads);
 				}
 			});
 		}
@@ -359,16 +333,11 @@ public class DefaultServletWebServerFactoryCustomizer
 		@SuppressWarnings("rawtypes")
 		private static void customizeMinThreads(TomcatServletWebServerFactory factory,
 				final int minSpareThreads) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-				@Override
-				public void customize(Connector connector) {
-
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractProtocol) {
-						AbstractProtocol protocol = (AbstractProtocol) handler;
-						protocol.setMinSpareThreads(minSpareThreads);
-					}
-
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractProtocol) {
+					AbstractProtocol protocol = (AbstractProtocol) handler;
+					protocol.setMinSpareThreads(minSpareThreads);
 				}
 			});
 		}
@@ -376,30 +345,19 @@ public class DefaultServletWebServerFactoryCustomizer
 		@SuppressWarnings("rawtypes")
 		private static void customizeMaxHttpHeaderSize(
 				TomcatServletWebServerFactory factory, final int maxHttpHeaderSize) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-
-				@Override
-				public void customize(Connector connector) {
-					ProtocolHandler handler = connector.getProtocolHandler();
-					if (handler instanceof AbstractHttp11Protocol) {
-						AbstractHttp11Protocol protocol = (AbstractHttp11Protocol) handler;
-						protocol.setMaxHttpHeaderSize(maxHttpHeaderSize);
-					}
+			factory.addConnectorCustomizers((connector) -> {
+				ProtocolHandler handler = connector.getProtocolHandler();
+				if (handler instanceof AbstractHttp11Protocol) {
+					AbstractHttp11Protocol protocol = (AbstractHttp11Protocol) handler;
+					protocol.setMaxHttpHeaderSize(maxHttpHeaderSize);
 				}
-
 			});
 		}
 
 		private static void customizeMaxHttpPostSize(
 				TomcatServletWebServerFactory factory, final int maxHttpPostSize) {
-			factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
-
-				@Override
-				public void customize(Connector connector) {
-					connector.setMaxPostSize(maxHttpPostSize);
-				}
-
-			});
+			factory.addConnectorCustomizers(
+					(connector) -> connector.setMaxPostSize(maxHttpPostSize));
 		}
 
 		private static void customizeAccessLog(ServerProperties.Tomcat tomcatProperties,
@@ -422,14 +380,8 @@ public class DefaultServletWebServerFactoryCustomizer
 		private static void customizeRedirectContextRoot(
 				TomcatServletWebServerFactory factory,
 				final boolean redirectContextRoot) {
-			factory.addContextCustomizers(new TomcatContextCustomizer() {
-
-				@Override
-				public void customize(Context context) {
-					context.setMapperContextRootRedirectEnabled(redirectContextRoot);
-				}
-
-			});
+			factory.addContextCustomizers((context) -> context
+					.setMapperContextRootRedirectEnabled(redirectContextRoot));
 		}
 
 	}
@@ -482,39 +434,20 @@ public class DefaultServletWebServerFactoryCustomizer
 
 		private static void customizeConnectionTimeout(
 				UndertowServletWebServerFactory factory, final int connectionTimeout) {
-			factory.addBuilderCustomizers(new UndertowBuilderCustomizer() {
-				@Override
-				public void customize(Undertow.Builder builder) {
-					builder.setSocketOption(UndertowOptions.NO_REQUEST_TIMEOUT,
-							connectionTimeout);
-				}
-			});
+			factory.addBuilderCustomizers((builder) -> builder.setSocketOption(
+					UndertowOptions.NO_REQUEST_TIMEOUT, connectionTimeout));
 		}
 
 		private static void customizeMaxHttpHeaderSize(
 				UndertowServletWebServerFactory factory, final int maxHttpHeaderSize) {
-			factory.addBuilderCustomizers(new UndertowBuilderCustomizer() {
-
-				@Override
-				public void customize(Undertow.Builder builder) {
-					builder.setServerOption(UndertowOptions.MAX_HEADER_SIZE,
-							maxHttpHeaderSize);
-				}
-
-			});
+			factory.addBuilderCustomizers((builder) -> builder
+					.setServerOption(UndertowOptions.MAX_HEADER_SIZE, maxHttpHeaderSize));
 		}
 
 		private static void customizeMaxHttpPostSize(
 				UndertowServletWebServerFactory factory, final long maxHttpPostSize) {
-			factory.addBuilderCustomizers(new UndertowBuilderCustomizer() {
-
-				@Override
-				public void customize(Undertow.Builder builder) {
-					builder.setServerOption(UndertowOptions.MAX_ENTITY_SIZE,
-							maxHttpPostSize);
-				}
-
-			});
+			factory.addBuilderCustomizers((builder -> builder
+					.setServerOption(UndertowOptions.MAX_ENTITY_SIZE, maxHttpPostSize)));
 		}
 
 	}
@@ -551,19 +484,13 @@ public class DefaultServletWebServerFactoryCustomizer
 
 		private static void customizeConnectionTimeout(
 				JettyServletWebServerFactory factory, final int connectionTimeout) {
-			factory.addServerCustomizers(new JettyServerCustomizer() {
-
-				@Override
-				public void customize(Server server) {
-					for (org.eclipse.jetty.server.Connector connector : server
-							.getConnectors()) {
-						if (connector instanceof AbstractConnector) {
-							((AbstractConnector) connector)
-									.setIdleTimeout(connectionTimeout);
-						}
+			factory.addServerCustomizers((server) -> {
+				for (org.eclipse.jetty.server.Connector connector : server
+						.getConnectors()) {
+					if (connector instanceof AbstractConnector) {
+						((AbstractConnector) connector).setIdleTimeout(connectionTimeout);
 					}
 				}
-
 			});
 		}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/websocket/reactive/TomcatWebSocketReactiveWebServerCustomizer.java

@@ -16,10 +16,8 @@
 
 package org.springframework.boot.autoconfigure.websocket.reactive;
 
-import org.apache.catalina.Context;
 import org.apache.tomcat.websocket.server.WsContextListener;
 
-import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatReactiveWebServerFactory;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.core.Ordered;
@@ -35,14 +33,8 @@ public class TomcatWebSocketReactiveWebServerCustomizer
 
 	@Override
 	public void customize(TomcatReactiveWebServerFactory factory) {
-		factory.addContextCustomizers(new TomcatContextCustomizer() {
-
-			@Override
-			public void customize(Context context) {
-				context.addApplicationListener(WsContextListener.class.getName());
-			}
-
-		});
+		factory.addContextCustomizers((context) -> context
+				.addApplicationListener(WsContextListener.class.getName()));
 	}
 
 	@Override

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationImportSelectorTests.java

@@ -249,15 +249,7 @@ public class AutoConfigurationImportSelectorTests {
 		@Override
 		protected List<AutoConfigurationImportListener> getAutoConfigurationImportListeners() {
 			return Collections.<AutoConfigurationImportListener>singletonList(
-					new AutoConfigurationImportListener() {
-
-						@Override
-						public void onAutoConfigurationImportEvent(
-								AutoConfigurationImportEvent event) {
-							TestAutoConfigurationImportSelector.this.lastEvent = event;
-						}
-
-					});
+					(event) -> this.lastEvent = event);
 		}
 
 		public AutoConfigurationImportEvent getLastEvent() {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/batch/JobLauncherCommandLineRunnerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,7 +23,6 @@ import org.springframework.batch.core.Job;
 import org.springframework.batch.core.JobParameters;
 import org.springframework.batch.core.JobParametersBuilder;
 import org.springframework.batch.core.Step;
-import org.springframework.batch.core.StepContribution;
 import org.springframework.batch.core.configuration.annotation.BatchConfigurer;
 import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
 import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
@@ -35,9 +34,7 @@ import org.springframework.batch.core.launch.support.RunIdIncrementer;
 import org.springframework.batch.core.launch.support.SimpleJobLauncher;
 import org.springframework.batch.core.repository.JobRepository;
 import org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean;
-import org.springframework.batch.core.scope.context.ChunkContext;
 import org.springframework.batch.core.step.tasklet.Tasklet;
-import org.springframework.batch.repeat.RepeatStatus;
 import org.springframework.batch.support.transaction.ResourcelessTransactionManager;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Configuration;
@@ -80,13 +77,8 @@ public class JobLauncherCommandLineRunnerTests {
 		PlatformTransactionManager transactionManager = this.context
 				.getBean(PlatformTransactionManager.class);
 		this.steps = new StepBuilderFactory(jobRepository, transactionManager);
-		this.step = this.steps.get("step").tasklet(new Tasklet() {
-			@Override
-			public RepeatStatus execute(StepContribution contribution,
-					ChunkContext chunkContext) throws Exception {
-				return null;
-			}
-		}).build();
+		Tasklet tasklet = (contribution, chunkContext) -> null;
+		this.step = this.steps.get("step").tasklet(tasklet).build();
 		this.job = this.jobs.get("job").start(this.step).build();
 		this.jobExplorer = this.context.getBean(JobExplorer.class);
 		this.runner = new JobLauncherCommandLineRunner(this.jobLauncher,
@@ -115,13 +107,8 @@ public class JobLauncherCommandLineRunnerTests {
 	@Test
 	public void retryFailedExecution() throws Exception {
 		this.job = this.jobs.get("job")
-				.start(this.steps.get("step").tasklet(new Tasklet() {
-					@Override
-					public RepeatStatus execute(StepContribution contribution,
-							ChunkContext chunkContext) throws Exception {
-						throw new RuntimeException("Planned");
-					}
-				}).build()).incrementer(new RunIdIncrementer()).build();
+				.start(this.steps.get("step").tasklet(throwingTasklet()).build())
+				.incrementer(new RunIdIncrementer()).build();
 		this.runner.execute(this.job, new JobParameters());
 		this.runner.execute(this.job, new JobParameters());
 		assertThat(this.jobExplorer.getJobInstances("job", 0, 100)).hasSize(1);
@@ -130,13 +117,8 @@ public class JobLauncherCommandLineRunnerTests {
 	@Test
 	public void retryFailedExecutionOnNonRestartableJob() throws Exception {
 		this.job = this.jobs.get("job").preventRestart()
-				.start(this.steps.get("step").tasklet(new Tasklet() {
-					@Override
-					public RepeatStatus execute(StepContribution contribution,
-							ChunkContext chunkContext) throws Exception {
-						throw new RuntimeException("Planned");
-					}
-				}).build()).incrementer(new RunIdIncrementer()).build();
+				.start(this.steps.get("step").tasklet(throwingTasklet()).build())
+				.incrementer(new RunIdIncrementer()).build();
 		this.runner.execute(this.job, new JobParameters());
 		this.runner.execute(this.job, new JobParameters());
 		// A failed job that is not restartable does not re-use the job params of
@@ -147,13 +129,8 @@ public class JobLauncherCommandLineRunnerTests {
 	@Test
 	public void retryFailedExecutionWithNonIdentifyingParameters() throws Exception {
 		this.job = this.jobs.get("job")
-				.start(this.steps.get("step").tasklet(new Tasklet() {
-					@Override
-					public RepeatStatus execute(StepContribution contribution,
-							ChunkContext chunkContext) throws Exception {
-						throw new RuntimeException("Planned");
-					}
-				}).build()).incrementer(new RunIdIncrementer()).build();
+				.start(this.steps.get("step").tasklet(throwingTasklet()).build())
+				.incrementer(new RunIdIncrementer()).build();
 		JobParameters jobParameters = new JobParametersBuilder().addLong("id", 1L, false)
 				.addLong("foo", 2L, false).toJobParameters();
 		this.runner.execute(this.job, jobParameters);
@@ -161,6 +138,12 @@ public class JobLauncherCommandLineRunnerTests {
 		assertThat(this.jobExplorer.getJobInstances("job", 0, 100)).hasSize(1);
 	}
 
+	private Tasklet throwingTasklet() {
+		return (contribution, chunkContext) -> {
+			throw new RuntimeException("Planned");
+		};
+	}
+
 	@Configuration
 	@EnableBatchProcessing
 	protected static class BatchConfiguration implements BatchConfigurer {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cache/CacheAutoConfigurationTests.java

@@ -19,7 +19,6 @@ package org.springframework.boot.autoconfigure.cache;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -69,7 +68,6 @@ import org.springframework.cache.caffeine.CaffeineCacheManager;
 import org.springframework.cache.concurrent.ConcurrentMapCache;
 import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
 import org.springframework.cache.ehcache.EhCacheCacheManager;
-import org.springframework.cache.interceptor.CacheOperationInvocationContext;
 import org.springframework.cache.interceptor.CacheResolver;
 import org.springframework.cache.jcache.JCacheCacheManager;
 import org.springframework.cache.support.NoOpCacheManager;
@@ -965,16 +963,13 @@ public class CacheAutoConfigurationTests {
 
 		@Bean
 		JCacheManagerCustomizer myCustomizer() {
-			return new JCacheManagerCustomizer() {
-				@Override
-				public void customize(javax.cache.CacheManager cacheManager) {
-					MutableConfiguration<?, ?> config = new MutableConfiguration<>();
-					config.setExpiryPolicyFactory(
-							CreatedExpiryPolicy.factoryOf(Duration.TEN_MINUTES));
-					config.setStatisticsEnabled(true);
-					cacheManager.createCache("custom1", config);
-					cacheManager.destroyCache("bar");
-				}
+			return (cacheManager) -> {
+				MutableConfiguration<?, ?> config = new MutableConfiguration<>();
+				config.setExpiryPolicyFactory(
+						CreatedExpiryPolicy.factoryOf(Duration.TEN_MINUTES));
+				config.setStatisticsEnabled(true);
+				cacheManager.createCache("custom1", config);
+				cacheManager.destroyCache("bar");
 			};
 		}
 
@@ -1053,15 +1048,7 @@ public class CacheAutoConfigurationTests {
 		@Bean
 		// The @Bean annotation is important, see CachingConfigurerSupport Javadoc
 		public CacheResolver cacheResolver() {
-			return new CacheResolver() {
-
-				@Override
-				public Collection<? extends Cache> resolveCaches(
-						CacheOperationInvocationContext<?> context) {
-					return Collections.singleton(mock(Cache.class));
-				}
-
-			};
+			return (context) -> Collections.singleton(mock(Cache.class));
 
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cache/support/MockCachingProvider.java

@@ -27,9 +27,6 @@ import javax.cache.configuration.Configuration;
 import javax.cache.configuration.OptionalFeature;
 import javax.cache.spi.CachingProvider;
 
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
-
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.BDDMockito.given;
@@ -52,24 +49,17 @@ public class MockCachingProvider implements CachingProvider {
 		given(cacheManager.getClassLoader()).willReturn(classLoader);
 		final Map<String, Cache> caches = new HashMap<>();
 		given(cacheManager.getCacheNames()).willReturn(caches.keySet());
-		given(cacheManager.getCache(anyString())).willAnswer(new Answer<Cache>() {
-			@Override
-			public Cache answer(InvocationOnMock invocationOnMock) throws Throwable {
-				String cacheName = (String) invocationOnMock.getArguments()[0];
-				return caches.get(cacheName);
-			}
+		given(cacheManager.getCache(anyString())).willAnswer((invocation) -> {
+			String cacheName = (String) invocation.getArguments()[0];
+			return caches.get(cacheName);
 		});
 		given(cacheManager.createCache(anyString(), any(Configuration.class)))
-				.will(new Answer<Cache>() {
-					@Override
-					public Cache answer(InvocationOnMock invocationOnMock)
-							throws Throwable {
-						String cacheName = (String) invocationOnMock.getArguments()[0];
-						Cache cache = mock(Cache.class);
-						given(cache.getName()).willReturn(cacheName);
-						caches.put(cacheName, cache);
-						return cache;
-					}
+				.will((invocation) -> {
+					String cacheName = (String) invocation.getArguments()[0];
+					Cache cache = mock(Cache.class);
+					given(cache.getName()).willReturn(cacheName);
+					caches.put(cacheName, cache);
+					return cache;
 				});
 		return cacheManager;
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfigurationTests.java

@@ -143,12 +143,7 @@ public class CassandraAutoConfigurationTests {
 
 		@Bean
 		public ClusterBuilderCustomizer customizer() {
-			return new ClusterBuilderCustomizer() {
-				@Override
-				public void customize(Cluster.Builder clusterBuilder) {
-					clusterBuilder.withClusterName("overridden-name");
-				}
-			};
+			return (clusterBuilder) -> clusterBuilder.withClusterName("overridden-name");
 		}
 
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/elasticsearch/jest/JestAutoConfigurationTests.java

@@ -24,7 +24,6 @@ import com.google.gson.Gson;
 import io.searchbox.action.Action;
 import io.searchbox.client.JestClient;
 import io.searchbox.client.JestResult;
-import io.searchbox.client.config.HttpClientConfig;
 import io.searchbox.client.http.JestHttpClient;
 import io.searchbox.core.Index;
 import io.searchbox.core.Search;
@@ -183,14 +182,7 @@ public class JestAutoConfigurationTests {
 
 		@Bean
 		public HttpClientConfigBuilderCustomizer customizer() {
-			return new HttpClientConfigBuilderCustomizer() {
-
-				@Override
-				public void customize(HttpClientConfig.Builder builder) {
-					builder.gson(BuilderCustomizer.this.gson);
-				}
-
-			};
+			return (builder) -> builder.gson(BuilderCustomizer.this.gson);
 		}
 
 		Gson getGson() {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfigurationTests.java

@@ -533,13 +533,7 @@ public class JacksonAutoConfigurationTests {
 
 		@Bean
 		public Jackson2ObjectMapperBuilderCustomizer customDateFormat() {
-			return new Jackson2ObjectMapperBuilderCustomizer() {
-				@Override
-				public void customize(
-						Jackson2ObjectMapperBuilder jackson2ObjectMapperBuilder) {
-					jackson2ObjectMapperBuilder.dateFormat(new MyDateFormat());
-				}
-			};
+			return (builder) -> builder.dateFormat(new MyDateFormat());
 		}
 
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/DataSourceInitializerTests.java

@@ -350,14 +350,8 @@ public class DataSourceInitializerTests {
 		@Override
 		public Resource[] getResources(String locationPattern) throws IOException {
 			Resource[] resources = this.resolver.getResources(locationPattern);
-			Arrays.sort(resources, new Comparator<Resource>() {
-
-				@Override
-				public int compare(Resource r1, Resource r2) {
-					return r2.getFilename().compareTo(r1.getFilename());
-				}
-
-			});
+			Arrays.sort(resources,
+					Comparator.comparing(Resource::getFilename).reversed());
 			return resources;
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/metadata/AbstractDataSourcePoolMetadataTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,13 +16,9 @@
 
 package org.springframework.boot.autoconfigure.jdbc.metadata;
 
-import java.sql.Connection;
-import java.sql.SQLException;
-
 import org.junit.Test;
 
 import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
-import org.springframework.dao.DataAccessException;
 import org.springframework.jdbc.core.ConnectionCallback;
 import org.springframework.jdbc.core.JdbcTemplate;
 
@@ -57,13 +53,7 @@ public abstract class AbstractDataSourcePoolMetadataTests<D extends AbstractData
 		// Make sure the pool is initialized
 		JdbcTemplate jdbcTemplate = new JdbcTemplate(
 				getDataSourceMetadata().getDataSource());
-		jdbcTemplate.execute(new ConnectionCallback<Void>() {
-			@Override
-			public Void doInConnection(Connection connection)
-					throws SQLException, DataAccessException {
-				return null;
-			}
-		});
+		jdbcTemplate.execute((ConnectionCallback<Void>) (connection) -> null);
 		assertThat(getDataSourceMetadata().getActive()).isEqualTo(Integer.valueOf(0));
 		assertThat(getDataSourceMetadata().getUsage()).isEqualTo(Float.valueOf(0));
 	}
@@ -72,16 +62,10 @@ public abstract class AbstractDataSourcePoolMetadataTests<D extends AbstractData
 	public void getPoolSizeOneConnection() {
 		JdbcTemplate jdbcTemplate = new JdbcTemplate(
 				getDataSourceMetadata().getDataSource());
-		jdbcTemplate.execute(new ConnectionCallback<Void>() {
-			@Override
-			public Void doInConnection(Connection connection)
-					throws SQLException, DataAccessException {
-				assertThat(getDataSourceMetadata().getActive())
-						.isEqualTo(Integer.valueOf(1));
-				assertThat(getDataSourceMetadata().getUsage())
-						.isEqualTo(Float.valueOf(0.5F));
-				return null;
-			}
+		jdbcTemplate.execute((ConnectionCallback<Void>) (connection) -> {
+			assertThat(getDataSourceMetadata().getActive()).isEqualTo(Integer.valueOf(1));
+			assertThat(getDataSourceMetadata().getUsage()).isEqualTo(Float.valueOf(0.5F));
+			return null;
 		});
 	}
 
@@ -89,25 +73,13 @@ public abstract class AbstractDataSourcePoolMetadataTests<D extends AbstractData
 	public void getPoolSizeTwoConnections() {
 		final JdbcTemplate jdbcTemplate = new JdbcTemplate(
 				getDataSourceMetadata().getDataSource());
-		jdbcTemplate.execute(new ConnectionCallback<Void>() {
-
-			@Override
-			public Void doInConnection(Connection connection)
-					throws SQLException, DataAccessException {
-				jdbcTemplate.execute(new ConnectionCallback<Void>() {
-
-					@Override
-					public Void doInConnection(Connection connection)
-							throws SQLException, DataAccessException {
-						assertThat(getDataSourceMetadata().getActive()).isEqualTo(2);
-						assertThat(getDataSourceMetadata().getUsage()).isEqualTo(1.0f);
-						return null;
-					}
-
-				});
+		jdbcTemplate.execute((ConnectionCallback<Void>) (connection) -> {
+			jdbcTemplate.execute((ConnectionCallback<Void>) connection1 -> {
+				assertThat(getDataSourceMetadata().getActive()).isEqualTo(2);
+				assertThat(getDataSourceMetadata().getUsage()).isEqualTo(1.0f);
 				return null;
-			}
-
+			});
+			return null;
 		});
 	}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jms/artemis/ArtemisAutoConfigurationTests.java

@@ -23,7 +23,6 @@ import java.util.UUID;
 import javax.jms.Destination;
 import javax.jms.JMSException;
 import javax.jms.Message;
-import javax.jms.Session;
 import javax.jms.TextMessage;
 
 import org.apache.activemq.artemis.api.core.TransportConfiguration;
@@ -336,25 +335,22 @@ public class ArtemisAutoConfigurationTests {
 
 		public void checkDestination(final String name, final boolean pubSub,
 				final boolean shouldExist) {
-			this.jmsTemplate.execute(new SessionCallback<Void>() {
-				@Override
-				public Void doInJms(Session session) throws JMSException {
-					try {
-						Destination destination = DestinationChecker.this.destinationResolver
-								.resolveDestinationName(session, name, pubSub);
-						if (!shouldExist) {
-							throw new IllegalStateException("Destination '" + name
-									+ "' was not expected but got " + destination);
-						}
+			this.jmsTemplate.execute((SessionCallback<Void>) (session) -> {
+				try {
+					Destination destination = this.destinationResolver
+							.resolveDestinationName(session, name, pubSub);
+					if (!shouldExist) {
+						throw new IllegalStateException("Destination '" + name
+								+ "' was not expected but got " + destination);
 					}
-					catch (JMSException e) {
-						if (shouldExist) {
-							throw new IllegalStateException("Destination '" + name
-									+ "' was expected but got " + e.getMessage());
-						}
-					}
-					return null;
 				}
+				catch (JMSException ex) {
+					if (shouldExist) {
+						throw new IllegalStateException("Destination '" + name
+								+ "' was expected but got " + ex.getMessage());
+					}
+				}
+				return null;
 			});
 		}
 
@@ -408,13 +404,9 @@ public class ArtemisAutoConfigurationTests {
 
 		@Bean
 		public ArtemisConfigurationCustomizer myArtemisCustomize() {
-			return new ArtemisConfigurationCustomizer() {
-				@Override
-				public void customize(
-						org.apache.activemq.artemis.core.config.Configuration configuration) {
-					configuration.setClusterPassword("Foobar");
-					configuration.setName("customFooBar");
-				}
+			return (configuration) -> {
+				configuration.setClusterPassword("Foobar");
+				configuration.setName("customFooBar");
 			};
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/logging/AutoConfigurationReportLoggingInitializerTests.java

@@ -62,9 +62,8 @@ public class AutoConfigurationReportLoggingInitializerTests {
 		this.initializer.initialize(context);
 		context.register(Config.class);
 		context.refresh();
-		withDebugLogging(() -> {
-			this.initializer.onApplicationEvent(new ContextRefreshedEvent(context));
-		});
+		withDebugLogging(() -> this.initializer
+				.onApplicationEvent(new ContextRefreshedEvent(context)));
 		assertThat(this.outputCapture.toString()).contains("AUTO-CONFIGURATION REPORT");
 	}
 
@@ -78,10 +77,9 @@ public class AutoConfigurationReportLoggingInitializerTests {
 			fail("Did not error");
 		}
 		catch (Exception ex) {
-			withDebugLogging(() -> {
-				this.initializer.onApplicationEvent(new ApplicationFailedEvent(
-						new SpringApplication(), new String[0], context, ex));
-			});
+			withDebugLogging(
+					() -> this.initializer.onApplicationEvent(new ApplicationFailedEvent(
+							new SpringApplication(), new String[0], context, ex)));
 		}
 		assertThat(this.outputCapture.toString()).contains("AUTO-CONFIGURATION REPORT");
 	}
@@ -112,9 +110,8 @@ public class AutoConfigurationReportLoggingInitializerTests {
 		ConditionEvaluationReport.get(context.getBeanFactory())
 				.recordExclusions(Arrays.asList("com.foo.Bar"));
 		context.refresh();
-		withDebugLogging(() -> {
-			this.initializer.onApplicationEvent(new ContextRefreshedEvent(context));
-		});
+		withDebugLogging(() -> this.initializer
+				.onApplicationEvent(new ContextRefreshedEvent(context)));
 		assertThat(this.outputCapture.toString())
 				.contains("not a servlet web application (OnWebApplicationCondition)");
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/SecurityAutoConfigurationTests.java

@@ -50,7 +50,6 @@ import org.springframework.security.config.annotation.authentication.configurers
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
-import org.springframework.security.core.Authentication;
 import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.core.authority.AuthorityUtils;
 import org.springframework.security.core.userdetails.UserDetailsService;
@@ -407,14 +406,8 @@ public class SecurityAutoConfigurationTests {
 
 		@Bean
 		public AuthenticationManager myAuthenticationManager() {
-			this.authenticationManager = new AuthenticationManager() {
-
-				@Override
-				public Authentication authenticate(Authentication authentication)
-						throws AuthenticationException {
-					return new TestingAuthenticationToken("foo", "bar");
-				}
-			};
+			this.authenticationManager = (
+					authentication) -> new TestingAuthenticationToken("foo", "bar");
 			return this.authenticationManager;
 		}
 
@@ -446,14 +439,8 @@ public class SecurityAutoConfigurationTests {
 
 		@Override
 		protected void configure(HttpSecurity http) throws Exception {
-			this.authenticationManager = new AuthenticationManager() {
-				@Override
-				public Authentication authenticate(Authentication authentication)
-						throws AuthenticationException {
-					return WorkaroundSecurityCustomizer.this.builder.getOrBuild()
-							.authenticate(authentication);
-				}
-			};
+			this.authenticationManager = (authentication) -> this.builder.getOrBuild()
+					.authenticate(authentication);
 		}
 
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/ResourceServerTokenServicesConfigurationTests.java

@@ -16,10 +16,6 @@
 
 package org.springframework.boot.autoconfigure.security.oauth2.resource;
 
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
@@ -45,14 +41,9 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.StandardEnvironment;
-import org.springframework.http.HttpRequest;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
-import org.springframework.http.client.ClientHttpRequestExecution;
-import org.springframework.http.client.ClientHttpRequestInterceptor;
-import org.springframework.http.client.ClientHttpResponse;
 import org.springframework.mock.http.client.MockClientHttpResponse;
-import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.AuthorityUtils;
 import org.springframework.security.oauth2.client.OAuth2RestTemplate;
 import org.springframework.security.oauth2.client.token.grant.code.AuthorizationCodeResourceDetails;
@@ -299,16 +290,8 @@ public class ResourceServerTokenServicesConfigurationTests {
 
 		@Bean
 		AuthoritiesExtractor authoritiesExtractor() {
-			return new AuthoritiesExtractor() {
-
-				@Override
-				public List<GrantedAuthority> extractAuthorities(
-						Map<String, Object> map) {
-					return AuthorityUtils
-							.commaSeparatedStringToAuthorityList("ROLE_ADMIN");
-				}
-
-			};
+			return (map) -> AuthorityUtils
+					.commaSeparatedStringToAuthorityList("ROLE_ADMIN");
 		}
 
 	}
@@ -318,14 +301,7 @@ public class ResourceServerTokenServicesConfigurationTests {
 
 		@Bean
 		PrincipalExtractor principalExtractor() {
-			return new PrincipalExtractor() {
-
-				@Override
-				public Object extractPrincipal(Map<String, Object> map) {
-					return "boot";
-				}
-
-			};
+			return (map) -> "boot";
 		}
 
 	}
@@ -372,15 +348,8 @@ public class ResourceServerTokenServicesConfigurationTests {
 
 		@Override
 		public void customize(OAuth2RestTemplate template) {
-			template.getInterceptors().add(new ClientHttpRequestInterceptor() {
-
-				@Override
-				public ClientHttpResponse intercept(HttpRequest request, byte[] body,
-						ClientHttpRequestExecution execution) throws IOException {
-					return execution.execute(request, body);
-				}
-
-			});
+			template.getInterceptors()
+					.add((request, body, execution) -> execution.execute(request, body));
 		}
 
 	}
@@ -434,18 +403,12 @@ public class ResourceServerTokenServicesConfigurationTests {
 
 		@Override
 		public void customize(RestTemplate template) {
-			template.getInterceptors().add(new ClientHttpRequestInterceptor() {
-
-				@Override
-				public ClientHttpResponse intercept(HttpRequest request, byte[] body,
-						ClientHttpRequestExecution execution) throws IOException {
-					String payload = "{\"value\":\"FOO\"}";
-					MockClientHttpResponse response = new MockClientHttpResponse(
-							payload.getBytes(), HttpStatus.OK);
-					response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
-					return response;
-				}
-
+			template.getInterceptors().add((request, body, execution) -> {
+				String payload = "{\"value\":\"FOO\"}";
+				MockClientHttpResponse response = new MockClientHttpResponse(
+						payload.getBytes(), HttpStatus.OK);
+				response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
+				return response;
 			});
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/client/RestTemplateAutoConfigurationTests.java

@@ -154,13 +154,8 @@ public class RestTemplateAutoConfigurationTests {
 		}
 
 		private void breakBuilderOnNextCall(RestTemplateBuilder builder) {
-			builder.additionalCustomizers(new RestTemplateCustomizer() {
-
-				@Override
-				public void customize(RestTemplate restTemplate) {
-					throw new IllegalStateException();
-				}
-
+			builder.additionalCustomizers((restTemplate) -> {
+				throw new IllegalStateException();
 			});
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/MockServletWebServerFactory.java

@@ -69,7 +69,7 @@ public class MockServletWebServerFactory extends AbstractServletWebServerFactory
 
 		public MockServletWebServer(ServletContextInitializer[] initializers, int port) {
 			super(Arrays.stream(initializers)
-					.map((i) -> (Initializer) (s) -> i.onStartup(s))
+					.map((initializer) -> (Initializer) initializer::onStartup)
 					.toArray(Initializer[]::new), port);
 		}
 

spring-boot-cli/src/it/java/org/springframework/boot/cli/infrastructure/CommandLineInvoker.java

@@ -18,7 +18,6 @@ package org.springframework.boot.cli.infrastructure;
 
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileFilter;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -71,14 +70,8 @@ public final class CommandLineInvoker {
 	private File findLaunchScript() throws IOException {
 		File unpacked = new File("target/unpacked-cli");
 		if (!unpacked.isDirectory()) {
-			File zip = new File("target").listFiles(new FileFilter() {
-
-				@Override
-				public boolean accept(File pathname) {
-					return pathname.getName().endsWith("-bin.zip");
-				}
-
-			})[0];
+			File zip = new File("target")
+					.listFiles((pathname) -> pathname.getName().endsWith("-bin.zip"))[0];
 			try (ZipInputStream input = new ZipInputStream(new FileInputStream(zip))) {
 				ZipEntry entry;
 				while ((entry = input.getNextEntry()) != null) {

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/archive/ArchiveCommand.java

@@ -57,9 +57,7 @@ import org.springframework.boot.cli.compiler.RepositoryConfigurationFactory;
 import org.springframework.boot.cli.compiler.grape.RepositoryConfiguration;
 import org.springframework.boot.loader.tools.JarWriter;
 import org.springframework.boot.loader.tools.Layout;
-import org.springframework.boot.loader.tools.Libraries;
 import org.springframework.boot.loader.tools.Library;
-import org.springframework.boot.loader.tools.LibraryCallback;
 import org.springframework.boot.loader.tools.LibraryScope;
 import org.springframework.boot.loader.tools.Repackager;
 import org.springframework.core.io.Resource;
@@ -198,13 +196,9 @@ abstract class ArchiveCommand extends OptionParsingCommand {
 			libraries.addAll(createLibraries(dependencies));
 			Repackager repackager = new Repackager(file);
 			repackager.setMainClass(PackagedSpringApplicationLauncher.class.getName());
-			repackager.repackage(new Libraries() {
-
-				@Override
-				public void doWithLibraries(LibraryCallback callback) throws IOException {
-					for (Library library : libraries) {
-						callback.library(library);
-					}
+			repackager.repackage((callback) -> {
+				for (Library library : libraries) {
+					callback.library(library);
 				}
 			});
 		}

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/init/ServiceCapabilitiesReportGenerator.java

@@ -94,11 +94,7 @@ class ServiceCapabilitiesReportGenerator {
 
 	private List<Dependency> getSortedDependencies(InitializrServiceMetadata metadata) {
 		ArrayList<Dependency> dependencies = new ArrayList<>(metadata.getDependencies());
-		dependencies.sort(new Comparator<Dependency>() {
-			@Override public int compare(Dependency o1, Dependency o2) {
-				return o1.getId().compareTo(o2.getId());
-			}
-		});
+		dependencies.sort(Comparator.comparing(Dependency::getId));
 		return dependencies;
 	}
 
@@ -107,15 +103,7 @@ class ServiceCapabilitiesReportGenerator {
 		report.append("Available project types:" + NEW_LINE);
 		report.append("------------------------" + NEW_LINE);
 		SortedSet<Entry<String, ProjectType>> entries = new TreeSet<>(
-				new Comparator<Entry<String, ProjectType>>() {
-
-					@Override
-					public int compare(Entry<String, ProjectType> o1,
-							Entry<String, ProjectType> o2) {
-						return o1.getKey().compareTo(o2.getKey());
-					}
-
-				});
+				Comparator.comparing(Entry::getKey));
 		entries.addAll(metadata.getProjectTypes().entrySet());
 		for (Entry<String, ProjectType> entry : entries) {
 			ProjectType type = entry.getValue();

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/options/OptionHandler.java

@@ -130,17 +130,10 @@ public class OptionHandler {
 
 		@Override
 		public String format(Map<String, ? extends OptionDescriptor> options) {
-			Comparator<OptionDescriptor> comparator = new Comparator<OptionDescriptor>() {
-				@Override
-				public int compare(OptionDescriptor first, OptionDescriptor second) {
-					return first.options().iterator().next()
-							.compareTo(second.options().iterator().next());
-				}
-			};
-
+			Comparator<OptionDescriptor> comparator = (first, second) -> first.options()
+					.iterator().next().compareTo(second.options().iterator().next());
 			Set<OptionDescriptor> sorted = new TreeSet<>(comparator);
 			sorted.addAll(options.values());
-
 			for (OptionDescriptor descriptor : sorted) {
 				if (!descriptor.representsNonOptions()) {
 					this.help.add(new OptionHelpAdapter(descriptor));

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/shell/Shell.java

@@ -119,12 +119,7 @@ public class Shell {
 	}
 
 	private void attachSignalHandler() {
-		SignalUtils.attachSignalHandler(new Runnable() {
-			@Override
-			public void run() {
-				handleSigInt();
-			}
-		});
+		SignalUtils.attachSignalHandler(this::handleSigInt);
 	}
 
 	/**

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/ExtendedGroovyClassLoader.java

@@ -122,23 +122,23 @@ public class ExtendedGroovyClassLoader extends GroovyClassLoader {
 
 	@Override
 	public ClassCollector createCollector(CompilationUnit unit, SourceUnit su) {
-		InnerLoader loader = AccessController
-				.doPrivileged(new PrivilegedAction<InnerLoader>() {
-					@Override
-					public InnerLoader run() {
-						return new InnerLoader(ExtendedGroovyClassLoader.this) {
-							// Don't return URLs from the inner loader so that Tomcat only
-							// searches the parent. Fixes 'TLD skipped' issues
-							@Override
-							public URL[] getURLs() {
-								return NO_URLS;
-							}
-						};
-					}
-				});
+		InnerLoader loader = AccessController.doPrivileged(getInnerLoader());
 		return new ExtendedClassCollector(loader, unit, su);
 	}
 
+	private PrivilegedAction<InnerLoader> getInnerLoader() {
+		return () -> new InnerLoader(ExtendedGroovyClassLoader.this) {
+
+			// Don't return URLs from the inner loader so that Tomcat only
+			// searches the parent. Fixes 'TLD skipped' issues
+			@Override
+			public URL[] getURLs() {
+				return NO_URLS;
+			}
+
+		};
+	}
+
 	public CompilerConfiguration getConfiguration() {
 		return this.configuration;
 	}

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/grape/AetherGrapeEngine.java

@@ -100,19 +100,11 @@ public class AetherGrapeEngine implements GrapeEngine {
 				|| Boolean.getBoolean("groovy.grape.report.downloads")) {
 			return new DetailedProgressReporter(session, System.out);
 		}
-		else if ("none".equals(progressReporter)) {
-			return new ProgressReporter() {
-
-				@Override
-				public void finished() {
-
-				}
-
+		if ("none".equals(progressReporter)) {
+			return () -> {
 			};
 		}
-		else {
-			return new SummaryProgressReporter(session, System.out);
-		}
+		return new SummaryProgressReporter(session, System.out);
 	}
 
 	@Override

spring-boot-cli/src/test/java/org/springframework/boot/cli/CliTester.java

@@ -26,7 +26,6 @@ import java.net.URI;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.Callable;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
@@ -105,25 +104,22 @@ public class CliTester implements TestRule {
 			String... args) {
 		clearUrlHandler();
 		final String[] sources = getSources(args);
-		return Executors.newSingleThreadExecutor().submit(new Callable<T>() {
-			@Override
-			public T call() throws Exception {
-				ClassLoader loader = Thread.currentThread().getContextClassLoader();
-				System.setProperty("server.port", "0");
-				System.setProperty("spring.application.class.name",
-						"org.springframework.boot.cli.CliTesterSpringApplication");
-				System.setProperty("portfile",
-						new File("target/server.port").getAbsolutePath());
-				try {
-					command.run(sources);
-					return command;
-				}
-				finally {
-					System.clearProperty("server.port");
-					System.clearProperty("spring.application.class.name");
-					System.clearProperty("portfile");
-					Thread.currentThread().setContextClassLoader(loader);
-				}
+		return Executors.newSingleThreadExecutor().submit(() -> {
+			ClassLoader loader = Thread.currentThread().getContextClassLoader();
+			System.setProperty("server.port", "0");
+			System.setProperty("spring.application.class.name",
+					"org.springframework.boot.cli.CliTesterSpringApplication");
+			System.setProperty("portfile",
+					new File("target/server.port").getAbsolutePath());
+			try {
+				command.run(sources);
+				return command;
+			}
+			finally {
+				System.clearProperty("server.port");
+				System.clearProperty("spring.application.class.name");
+				System.clearProperty("portfile");
+				Thread.currentThread().setContextClassLoader(loader);
 			}
 		});
 	}

spring-boot-cli/src/test/java/org/springframework/boot/cli/compiler/RepositoryConfigurationFactoryTests.java

@@ -36,69 +36,53 @@ public class RepositoryConfigurationFactoryTests {
 
 	@Test
 	public void defaultRepositories() {
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
-						.createDefaultRepositoryConfiguration();
-				assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
-						"spring-snapshot", "spring-milestone");
-			}
+		SystemProperties.doWithSystemProperties(() -> {
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+			assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
+					"spring-snapshot", "spring-milestone");
 		}, "user.home:src/test/resources/maven-settings/basic");
 	}
 
 	@Test
 	public void snapshotRepositoriesDisabled() {
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
-						.createDefaultRepositoryConfiguration();
-				assertRepositoryConfiguration(repositoryConfiguration, "central",
-						"local");
-			}
+		SystemProperties.doWithSystemProperties(() -> {
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+			assertRepositoryConfiguration(repositoryConfiguration, "central", "local");
 		}, "user.home:src/test/resources/maven-settings/basic",
 				"disableSpringSnapshotRepos:true");
 	}
 
 	@Test
 	public void activeByDefaultProfileRepositories() {
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
-						.createDefaultRepositoryConfiguration();
-				assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
-						"spring-snapshot", "spring-milestone", "active-by-default");
-			}
+		SystemProperties.doWithSystemProperties(() -> {
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+			assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
+					"spring-snapshot", "spring-milestone", "active-by-default");
 		}, "user.home:src/test/resources/maven-settings/active-profile-repositories");
 	}
 
 	@Test
 	public void activeByPropertyProfileRepositories() {
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
-						.createDefaultRepositoryConfiguration();
-				assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
-						"spring-snapshot", "spring-milestone", "active-by-property");
-			}
+		SystemProperties.doWithSystemProperties(() -> {
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+			assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
+					"spring-snapshot", "spring-milestone", "active-by-property");
 		}, "user.home:src/test/resources/maven-settings/active-profile-repositories",
 				"foo:bar");
 	}
 
 	@Test
 	public void interpolationProfileRepositories() {
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
-						.createDefaultRepositoryConfiguration();
-				assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
-						"spring-snapshot", "spring-milestone", "interpolate-releases",
-						"interpolate-snapshots");
-			}
+		SystemProperties.doWithSystemProperties(() -> {
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+			assertRepositoryConfiguration(repositoryConfiguration, "central", "local",
+					"spring-snapshot", "spring-milestone", "interpolate-releases",
+					"interpolate-snapshots");
 		}, "user.home:src/test/resources/maven-settings/active-profile-repositories",
 				"interpolate:true");
 	}

spring-boot-cli/src/test/java/org/springframework/boot/cli/compiler/grape/AetherGrapeEngineTests.java

@@ -72,54 +72,32 @@ public class AetherGrapeEngineTests {
 
 	@Test
 	public void proxySelector() {
-		doWithCustomUserHome(new Runnable() {
-
-			@Override
-			public void run() {
-				AetherGrapeEngine grapeEngine = createGrapeEngine();
-
-				DefaultRepositorySystemSession session = (DefaultRepositorySystemSession) ReflectionTestUtils
-						.getField(grapeEngine, "session");
-
-				assertThat(session.getProxySelector() instanceof CompositeProxySelector)
-						.isTrue();
-			}
+		doWithCustomUserHome(() -> {
+			AetherGrapeEngine grapeEngine = createGrapeEngine();
+			DefaultRepositorySystemSession session = (DefaultRepositorySystemSession) ReflectionTestUtils
+					.getField(grapeEngine, "session");
 
+			assertThat(session.getProxySelector() instanceof CompositeProxySelector)
+					.isTrue();
 		});
 	}
 
 	@Test
 	public void repositoryMirrors() {
-		doWithCustomUserHome(new Runnable() {
-
-			@SuppressWarnings("unchecked")
-			@Override
-			public void run() {
-				AetherGrapeEngine grapeEngine = createGrapeEngine();
-
-				List<RemoteRepository> repositories = (List<RemoteRepository>) ReflectionTestUtils
-						.getField(grapeEngine, "repositories");
-				assertThat(repositories).hasSize(1);
-				assertThat(repositories.get(0).getId()).isEqualTo("central-mirror");
-			}
+		doWithCustomUserHome(() -> {
+			List<RemoteRepository> repositories = getRepositories();
+			assertThat(repositories).hasSize(1);
+			assertThat(repositories.get(0).getId()).isEqualTo("central-mirror");
 		});
 	}
 
 	@Test
 	public void repositoryAuthentication() {
-		doWithCustomUserHome(new Runnable() {
-
-			@SuppressWarnings("unchecked")
-			@Override
-			public void run() {
-				AetherGrapeEngine grapeEngine = createGrapeEngine();
-
-				List<RemoteRepository> repositories = (List<RemoteRepository>) ReflectionTestUtils
-						.getField(grapeEngine, "repositories");
-				assertThat(repositories).hasSize(1);
-				Authentication authentication = repositories.get(0).getAuthentication();
-				assertThat(authentication).isNotNull();
-			}
+		doWithCustomUserHome(() -> {
+			List<RemoteRepository> repositories = getRepositories();
+			assertThat(repositories).hasSize(1);
+			Authentication authentication = repositories.get(0).getAuthentication();
+			assertThat(authentication).isNotNull();
 		});
 	}
 
@@ -216,6 +194,13 @@ public class AetherGrapeEngineTests {
 		assertThat(urls[0].toExternalForm().endsWith("-sources.jar")).isTrue();
 	}
 
+	@SuppressWarnings("unchecked")
+	private List<RemoteRepository> getRepositories() {
+		AetherGrapeEngine grapeEngine = createGrapeEngine();
+		return (List<RemoteRepository>) ReflectionTestUtils.getField(grapeEngine,
+				"repositories");
+	}
+
 	private Map<String, Object> createDependency(String group, String module,
 			String version) {
 		Map<String, Object> dependency = new HashMap<>();

spring-boot-cli/src/test/java/org/springframework/boot/cli/compiler/grape/GrapeRootRepositorySystemSessionAutoConfigurationTests.java

@@ -59,21 +59,12 @@ public class GrapeRootRepositorySystemSessionAutoConfigurationTests {
 	@Test
 	public void noLocalRepositoryWhenNoGrapeRoot() {
 		given(this.repositorySystem.newLocalRepositoryManager(eq(this.session),
-				any(LocalRepository.class)))
-						.willAnswer(new Answer<LocalRepositoryManager>() {
-
-							@Override
-							public LocalRepositoryManager answer(
-									InvocationOnMock invocation) throws Throwable {
-								LocalRepository localRepository = invocation
-										.getArgument(1);
-								return new SimpleLocalRepositoryManagerFactory()
-										.newInstance(
-												GrapeRootRepositorySystemSessionAutoConfigurationTests.this.session,
-												localRepository);
-							}
-
-						});
+				any(LocalRepository.class))).willAnswer((invocation) -> {
+					LocalRepository localRepository = invocation.getArgument(1);
+					return new SimpleLocalRepositoryManagerFactory().newInstance(
+							GrapeRootRepositorySystemSessionAutoConfigurationTests.this.session,
+							localRepository);
+				});
 		new GrapeRootRepositorySystemSessionAutoConfiguration().apply(this.session,
 				this.repositorySystem);
 		verify(this.repositorySystem, times(0))

spring-boot-cli/src/test/java/org/springframework/boot/cli/compiler/grape/SettingsXmlRepositorySystemSessionAutoConfigurationTests.java

@@ -26,7 +26,6 @@ import org.eclipse.aether.internal.impl.SimpleLocalRepositoryManagerFactory;
 import org.eclipse.aether.repository.Authentication;
 import org.eclipse.aether.repository.AuthenticationContext;
 import org.eclipse.aether.repository.LocalRepository;
-import org.eclipse.aether.repository.LocalRepositoryManager;
 import org.eclipse.aether.repository.Proxy;
 import org.eclipse.aether.repository.RemoteRepository;
 import org.junit.Before;
@@ -35,8 +34,6 @@ import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.boot.cli.testutil.SystemProperties;
 
@@ -78,28 +75,17 @@ public class SettingsXmlRepositorySystemSessionAutoConfigurationTests {
 		final DefaultRepositorySystemSession session = MavenRepositorySystemUtils
 				.newSession();
 		given(this.repositorySystem.newLocalRepositoryManager(eq(session),
-				any(LocalRepository.class)))
-						.willAnswer(new Answer<LocalRepositoryManager>() {
-
-							@Override
-							public LocalRepositoryManager answer(
-									InvocationOnMock invocation) throws Throwable {
-								LocalRepository localRepository = invocation
-										.getArgument(1);
-								return new SimpleLocalRepositoryManagerFactory()
-										.newInstance(session, localRepository);
-							}
-						});
-
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				new SettingsXmlRepositorySystemSessionAutoConfiguration().apply(session,
-						SettingsXmlRepositorySystemSessionAutoConfigurationTests.this.repositorySystem);
-			}
-		}, "user.home:src/test/resources/maven-settings/property-interpolation",
+				any(LocalRepository.class))).willAnswer((invocation) -> {
+					LocalRepository localRepository = invocation.getArgument(1);
+					return new SimpleLocalRepositoryManagerFactory().newInstance(session,
+							localRepository);
+				});
+		SystemProperties.doWithSystemProperties(
+				() -> new SettingsXmlRepositorySystemSessionAutoConfiguration().apply(
+						session,
+						SettingsXmlRepositorySystemSessionAutoConfigurationTests.this.repositorySystem),
+				"user.home:src/test/resources/maven-settings/property-interpolation",
 				"foo:bar");
-
 		assertThat(session.getLocalRepository().getBasedir().getAbsolutePath())
 				.endsWith(File.separatorChar + "bar" + File.separatorChar + "repository");
 	}
@@ -107,14 +93,11 @@ public class SettingsXmlRepositorySystemSessionAutoConfigurationTests {
 	private void assertSessionCustomization(String userHome) {
 		final DefaultRepositorySystemSession session = MavenRepositorySystemUtils
 				.newSession();
-		SystemProperties.doWithSystemProperties(new Runnable() {
-			@Override
-			public void run() {
-				new SettingsXmlRepositorySystemSessionAutoConfiguration().apply(session,
-						SettingsXmlRepositorySystemSessionAutoConfigurationTests.this.repositorySystem);
-			}
-		}, "user.home:" + userHome);
-
+		SystemProperties.doWithSystemProperties(
+				() -> new SettingsXmlRepositorySystemSessionAutoConfiguration().apply(
+						session,
+						SettingsXmlRepositorySystemSessionAutoConfigurationTests.this.repositorySystem),
+				"user.home:" + userHome);
 		RemoteRepository repository = new RemoteRepository.Builder("my-server", "default",
 				"http://maven.example.com").build();
 		assertMirrorSelectorConfiguration(session, repository);

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java

@@ -136,14 +136,7 @@ public class LocalDevToolsAutoConfiguration {
 
 		@Bean
 		public FileSystemWatcherFactory fileSystemWatcherFactory() {
-			return new FileSystemWatcherFactory() {
-
-				@Override
-				public FileSystemWatcher getFileSystemWatcher() {
-					return newFileSystemWatcher();
-				}
-
-			};
+			return this::newFileSystemWatcher;
 		}
 
 		private FileSystemWatcher newFileSystemWatcher() {

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/LiveReloadServer.java

@@ -89,14 +89,7 @@ public class LiveReloadServer {
 	 * @param port the listen port
 	 */
 	public LiveReloadServer(int port) {
-		this(port, new ThreadFactory() {
-
-			@Override
-			public Thread newThread(Runnable runnable) {
-				return new Thread(runnable);
-			}
-
-		});
+		this(port, Thread::new);
 	}
 
 	/**
@@ -121,14 +114,7 @@ public class LiveReloadServer {
 			logger.debug("Starting live reload server on port " + this.port);
 			this.serverSocket = new ServerSocket(this.port);
 			int localPort = this.serverSocket.getLocalPort();
-			this.listenThread = this.threadFactory.newThread(new Runnable() {
-
-				@Override
-				public void run() {
-					acceptConnections();
-				}
-
-			});
+			this.listenThread = this.threadFactory.newThread(this::acceptConnections);
 			this.listenThread.setDaemon(true);
 			this.listenThread.setName("Live Reload Server");
 			this.listenThread.start();

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/client/RemoteClientConfiguration.java

@@ -194,14 +194,7 @@ public class RemoteClientConfiguration {
 
 		@Bean
 		public FileSystemWatcherFactory getFileSystemWatcherFactory() {
-			return new FileSystemWatcherFactory() {
-
-				@Override
-				public FileSystemWatcher getFileSystemWatcher() {
-					return newFileSystemWatcher();
-				}
-
-			};
+			return this::newFileSystemWatcher;
 		}
 
 		private FileSystemWatcher newFileSystemWatcher() {

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/server/AccessManager.java

@@ -30,14 +30,7 @@ public interface AccessManager {
 	/**
 	 * {@link AccessManager} that permits all requests.
 	 */
-	AccessManager PERMIT_ALL = new AccessManager() {
-
-		@Override
-		public boolean isAllowed(ServerHttpRequest request) {
-			return true;
-		}
-
-	};
+	AccessManager PERMIT_ALL = (request) -> true;
 
 	/**
 	 * Determine if the specific request is allowed to be handled by the

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/FailureHandler.java

@@ -28,14 +28,7 @@ public interface FailureHandler {
 	/**
 	 * {@link FailureHandler} that always aborts.
 	 */
-	FailureHandler NONE = new FailureHandler() {
-
-		@Override
-		public Outcome handle(Throwable failure) {
-			return Outcome.ABORT;
-		}
-
-	};
+	FailureHandler NONE = (failure) -> Outcome.ABORT;
 
 	/**
 	 * Handle a run failure. Implementations may block, for example to wait until specific

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/RestartInitializer.java

@@ -31,14 +31,7 @@ public interface RestartInitializer {
 	/**
 	 * {@link RestartInitializer} that doesn't return any URLs.
 	 */
-	RestartInitializer NONE = new RestartInitializer() {
-
-		@Override
-		public URL[] getInitialUrls(Thread thread) {
-			return null;
-		}
-
-	};
+	RestartInitializer NONE = (thread) -> null;
 
 	/**
 	 * Return the initial set of URLs for the {@link Restarter} or {@code null} if no

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/Restarter.java

@@ -167,15 +167,10 @@ public class Restarter {
 
 	private void immediateRestart() {
 		try {
-			getLeakSafeThread().callAndWait(new Callable<Void>() {
-
-				@Override
-				public Void call() throws Exception {
-					start(FailureHandler.NONE);
-					cleanupCaches();
-					return null;
-				}
-
+			getLeakSafeThread().callAndWait(() -> {
+				start(FailureHandler.NONE);
+				cleanupCaches();
+				return null;
 			});
 		}
 		catch (Exception ex) {
@@ -251,15 +246,10 @@ public class Restarter {
 			return;
 		}
 		this.logger.debug("Restarting application");
-		getLeakSafeThread().call(new Callable<Void>() {
-
-			@Override
-			public Void call() throws Exception {
-				Restarter.this.stop();
-				Restarter.this.start(failureHandler);
-				return null;
-			}
-
+		getLeakSafeThread().call(() -> {
+			Restarter.this.stop();
+			Restarter.this.start(failureHandler);
+			return null;
 		});
 	}
 
@@ -641,15 +631,10 @@ public class Restarter {
 
 		@Override
 		public Thread newThread(final Runnable runnable) {
-			return getLeakSafeThread().callAndWait(new Callable<Thread>() {
-
-				@Override
-				public Thread call() throws Exception {
-					Thread thread = new Thread(runnable);
-					thread.setContextClassLoader(Restarter.this.applicationClassLoader);
-					return thread;
-				}
-
+			return getLeakSafeThread().callAndWait(() -> {
+				Thread thread = new Thread(runnable);
+				thread.setContextClassLoader(Restarter.this.applicationClassLoader);
+				return thread;
 			});
 		}
 

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/classloader/ClassLoaderFileRepository.java

@@ -31,14 +31,7 @@ public interface ClassLoaderFileRepository {
 	/**
 	 * Empty {@link ClassLoaderFileRepository} implementation.
 	 */
-	ClassLoaderFileRepository NONE = new ClassLoaderFileRepository() {
-
-		@Override
-		public ClassLoaderFile getFile(String name) {
-			return null;
-		}
-
-	};
+	ClassLoaderFileRepository NONE = (name) -> null;
 
 	/**
 	 * Return a {@link ClassLoaderFile} for the given name or {@code null} if no file is

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/classloader/RestartClassLoader.java

@@ -126,12 +126,8 @@ public class RestartClassLoader extends URLClassLoader implements SmartClassLoad
 		if (file.getKind() == Kind.DELETED) {
 			return null;
 		}
-		return AccessController.doPrivileged(new PrivilegedAction<URL>() {
-			@Override
-			public URL run() {
-				return createFileUrl(name, file);
-			}
-		});
+		return AccessController
+				.doPrivileged((PrivilegedAction<URL>) () -> createFileUrl(name, file));
 	}
 
 	@Override
@@ -167,12 +163,9 @@ public class RestartClassLoader extends URLClassLoader implements SmartClassLoad
 		if (file.getKind() == Kind.DELETED) {
 			throw new ClassNotFoundException(name);
 		}
-		return AccessController.doPrivileged(new PrivilegedAction<Class<?>>() {
-			@Override
-			public Class<?> run() {
-				byte[] bytes = file.getContents();
-				return defineClass(name, bytes, 0, bytes.length);
-			}
+		return AccessController.doPrivileged((PrivilegedAction<Class<?>>) () -> {
+			byte[] bytes = file.getContents();
+			return defineClass(name, bytes, 0, bytes.length);
 		});
 	}
 

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/classpath/ClassPathFileSystemWatcherTests.java

@@ -28,7 +28,6 @@ import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.junit.rules.TemporaryFolder;
 
-import org.springframework.boot.devtools.filewatch.ChangedFile;
 import org.springframework.boot.devtools.filewatch.FileSystemWatcher;
 import org.springframework.boot.devtools.filewatch.FileSystemWatcherFactory;
 import org.springframework.context.ApplicationListener;
@@ -113,14 +112,7 @@ public class ClassPathFileSystemWatcherTests {
 
 		@Bean
 		public ClassPathRestartStrategy restartStrategy() {
-			return new ClassPathRestartStrategy() {
-
-				@Override
-				public boolean isRestartRequired(ChangedFile file) {
-					return false;
-				}
-
-			};
+			return (file) -> false;
 		}
 
 		@Bean

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/filewatch/FileSystemWatcherTests.java

@@ -17,7 +17,6 @@
 package org.springframework.boot.devtools.filewatch;
 
 import java.io.File;
-import java.io.FileFilter;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -221,12 +220,7 @@ public class FileSystemWatcherTests {
 		File folder = this.temp.newFolder();
 		final Set<ChangedFiles> listener2Changes = new LinkedHashSet<>();
 		this.watcher.addSourceFolder(folder);
-		this.watcher.addListener(new FileChangeListener() {
-			@Override
-			public void onChange(Set<ChangedFiles> changeSet) {
-				listener2Changes.addAll(changeSet);
-			}
-		});
+		this.watcher.addListener(listener2Changes::addAll);
 		this.watcher.start();
 		File file = touch(new File(folder, "test.txt"));
 		this.watcher.stopAfter(1);
@@ -262,14 +256,8 @@ public class FileSystemWatcherTests {
 		File file = touch(new File(folder, "file.txt"));
 		File trigger = touch(new File(folder, "trigger.txt"));
 		this.watcher.addSourceFolder(folder);
-		this.watcher.setTriggerFilter(new FileFilter() {
-
-			@Override
-			public boolean accept(File file) {
-				return file.getName().equals("trigger.txt");
-			}
-
-		});
+		this.watcher.setTriggerFilter(
+				(candidate) -> candidate.getName().equals("trigger.txt"));
 		this.watcher.start();
 		FileCopyUtils.copy("abc".getBytes(), file);
 		Thread.sleep(100);
@@ -285,12 +273,8 @@ public class FileSystemWatcherTests {
 
 	private void setupWatcher(long pollingInterval, long quietPeriod) {
 		this.watcher = new FileSystemWatcher(false, pollingInterval, quietPeriod);
-		this.watcher.addListener(new FileChangeListener() {
-			@Override
-			public void onChange(Set<ChangedFiles> changeSet) {
-				FileSystemWatcherTests.this.changes.add(changeSet);
-			}
-		});
+		this.watcher.addListener(
+				(changeSet) -> FileSystemWatcherTests.this.changes.add(changeSet));
 	}
 
 	private File startWithNewFolder() throws IOException {

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/MainMethodTests.java

@@ -55,12 +55,7 @@ public class MainMethodTests {
 
 	@Test
 	public void validMainMethod() throws Exception {
-		MainMethod method = new TestThread(new Runnable() {
-			@Override
-			public void run() {
-				Valid.main();
-			}
-		}).test();
+		MainMethod method = new TestThread(Valid::main).test();
 		assertThat(method.getMethod()).isEqualTo(this.actualMain);
 		assertThat(method.getDeclaringClassName())
 				.isEqualTo(this.actualMain.getDeclaringClass().getName());
@@ -70,24 +65,14 @@ public class MainMethodTests {
 	public void missingArgsMainMethod() throws Exception {
 		this.thrown.expect(IllegalStateException.class);
 		this.thrown.expectMessage("Unable to find main method");
-		new TestThread(new Runnable() {
-			@Override
-			public void run() {
-				MissingArgs.main();
-			}
-		}).test();
+		new TestThread(MissingArgs::main).test();
 	}
 
 	@Test
 	public void nonStatic() throws Exception {
 		this.thrown.expect(IllegalStateException.class);
 		this.thrown.expectMessage("Unable to find main method");
-		new TestThread(new Runnable() {
-			@Override
-			public void run() {
-				new NonStaticMain().main();
-			}
-		}).test();
+		new TestThread(() -> new NonStaticMain().main()).test();
 	}
 
 	private static class TestThread extends Thread {

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/MockRestarter.java

@@ -19,13 +19,10 @@ package org.springframework.boot.devtools.restart;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ThreadFactory;
 
 import org.junit.rules.TestRule;
 import org.junit.runner.Description;
 import org.junit.runners.model.Statement;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.ObjectFactory;
 
@@ -64,30 +61,17 @@ public class MockRestarter implements TestRule {
 		Restarter.setInstance(this.mock);
 		given(this.mock.getInitialUrls()).willReturn(new URL[] {});
 		given(this.mock.getOrAddAttribute(anyString(), (ObjectFactory) any()))
-				.willAnswer(new Answer<Object>() {
-
-					@Override
-					public Object answer(InvocationOnMock invocation) throws Throwable {
-						String name = (String) invocation.getArguments()[0];
-						ObjectFactory factory = (ObjectFactory) invocation
-								.getArguments()[1];
-						Object attribute = MockRestarter.this.attributes.get(name);
-						if (attribute == null) {
-							attribute = factory.getObject();
-							MockRestarter.this.attributes.put(name, attribute);
-						}
-						return attribute;
+				.willAnswer((invocation) -> {
+					String name = (String) invocation.getArguments()[0];
+					ObjectFactory factory = (ObjectFactory) invocation.getArguments()[1];
+					Object attribute = MockRestarter.this.attributes.get(name);
+					if (attribute == null) {
+						attribute = factory.getObject();
+						MockRestarter.this.attributes.put(name, attribute);
 					}
-
+					return attribute;
 				});
-		given(this.mock.getThreadFactory()).willReturn(new ThreadFactory() {
-
-			@Override
-			public Thread newThread(Runnable r) {
-				return new Thread(r);
-			}
-
-		});
+		given(this.mock.getThreadFactory()).willReturn(Thread::new);
 	}
 
 	private void cleanup() {

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/OnInitializedRestarterConditionTests.java

@@ -67,14 +67,7 @@ public class OnInitializedRestarterConditionTests {
 
 	@Test
 	public void initialized() throws Exception {
-		Thread thread = new Thread() {
-
-			@Override
-			public void run() {
-				TestInitialized.main();
-			};
-
-		};
+		Thread thread = new Thread(TestInitialized::main);
 		thread.start();
 		synchronized (wait) {
 			wait.wait();

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/RestarterTests.java

@@ -28,7 +28,6 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.boot.devtools.restart.classloader.ClassLoaderFile;
 import org.springframework.boot.devtools.restart.classloader.ClassLoaderFile.Kind;
@@ -84,14 +83,7 @@ public class RestarterTests {
 	@Test
 	public void testRestart() throws Exception {
 		Restarter.clearInstance();
-		Thread thread = new Thread() {
-
-			@Override
-			public void run() {
-				SampleApplication.main();
-			};
-
-		};
+		Thread thread = new Thread(SampleApplication::main);
 		thread.start();
 		Thread.sleep(2600);
 		String output = this.out.toString();
@@ -150,12 +142,7 @@ public class RestarterTests {
 	@Test
 	@SuppressWarnings("rawtypes")
 	public void getOrAddAttributeWithExistingAttribute() throws Exception {
-		Restarter.getInstance().getOrAddAttribute("x", new ObjectFactory<String>() {
-			@Override
-			public String getObject() throws BeansException {
-				return "abc";
-			}
-		});
+		Restarter.getInstance().getOrAddAttribute("x", () -> "abc");
 		ObjectFactory objectFactory = mock(ObjectFactory.class);
 		Object attribute = Restarter.getInstance().getOrAddAttribute("x", objectFactory);
 		assertThat(attribute).isEqualTo("abc");
@@ -166,19 +153,16 @@ public class RestarterTests {
 	public void getThreadFactory() throws Exception {
 		final ClassLoader parentLoader = Thread.currentThread().getContextClassLoader();
 		final ClassLoader contextClassLoader = new URLClassLoader(new URL[0]);
-		Thread thread = new Thread() {
-			@Override
-			public void run() {
-				Runnable runnable = mock(Runnable.class);
-				Thread regular = new Thread();
-				ThreadFactory factory = Restarter.getInstance().getThreadFactory();
-				Thread viaFactory = factory.newThread(runnable);
-				// Regular threads will inherit the current thread
-				assertThat(regular.getContextClassLoader()).isEqualTo(contextClassLoader);
-				// Factory threads should inherit from the initial thread
-				assertThat(viaFactory.getContextClassLoader()).isEqualTo(parentLoader);
-			};
-		};
+		Thread thread = new Thread(() -> {
+			Runnable runnable = mock(Runnable.class);
+			Thread regular = new Thread();
+			ThreadFactory factory = Restarter.getInstance().getThreadFactory();
+			Thread viaFactory = factory.newThread(runnable);
+			// Regular threads will inherit the current thread
+			assertThat(regular.getContextClassLoader()).isEqualTo(contextClassLoader);
+			// Factory threads should inherit from the initial thread
+			assertThat(viaFactory.getContextClassLoader()).isEqualTo(parentLoader);
+		});
 		thread.setContextClassLoader(contextClassLoader);
 		thread.start();
 		thread.join();

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/SilentExitExceptionHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,12 +81,8 @@ public class SilentExitExceptionHandlerTests {
 		private Throwable thrown;
 
 		TestThread() {
-			setUncaughtExceptionHandler(new UncaughtExceptionHandler() {
-				@Override
-				public void uncaughtException(Thread t, Throwable e) {
-					TestThread.this.thrown = e;
-				}
-			});
+			setUncaughtExceptionHandler(
+					(thread, exception) -> TestThread.this.thrown = exception);
 		}
 
 		public Throwable getThrown() {
@@ -119,21 +115,16 @@ public class SilentExitExceptionHandlerTests {
 		@Override
 		protected Thread[] getAllThreads() {
 			final CountDownLatch threadRunning = new CountDownLatch(1);
-			Thread daemonThread = new Thread(new Runnable() {
-
-				@Override
-				public void run() {
-					synchronized (TestSilentExitExceptionHandler.this.monitor) {
-						threadRunning.countDown();
-						try {
-							TestSilentExitExceptionHandler.this.monitor.wait();
-						}
-						catch (InterruptedException ex) {
-							Thread.currentThread().interrupt();
-						}
+			Thread daemonThread = new Thread(() -> {
+				synchronized (TestSilentExitExceptionHandler.this.monitor) {
+					threadRunning.countDown();
+					try {
+						TestSilentExitExceptionHandler.this.monitor.wait();
+					}
+					catch (InterruptedException ex) {
+						Thread.currentThread().interrupt();
 					}
 				}
-
 			});
 			daemonThread.setDaemon(true);
 			daemonThread.start();

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/server/HttpTunnelServerTests.java

@@ -33,8 +33,6 @@ import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 
 import org.springframework.boot.devtools.tunnel.payload.HttpTunnelPayload;
 import org.springframework.boot.devtools.tunnel.server.HttpTunnelServer.HttpConnection;
@@ -90,13 +88,10 @@ public class HttpTunnelServerTests {
 	public void setup() throws Exception {
 		MockitoAnnotations.initMocks(this);
 		this.server = new HttpTunnelServer(this.serverConnection);
-		given(this.serverConnection.open(anyInt())).willAnswer(new Answer<ByteChannel>() {
-			@Override
-			public ByteChannel answer(InvocationOnMock invocation) throws Throwable {
-				MockServerChannel channel = HttpTunnelServerTests.this.serverChannel;
-				channel.setTimeout((Integer) invocation.getArguments()[0]);
-				return channel;
-			}
+		given(this.serverConnection.open(anyInt())).willAnswer((invocation) -> {
+			MockServerChannel channel = HttpTunnelServerTests.this.serverChannel;
+			channel.setTimeout((Integer) invocation.getArguments()[0]);
+			return channel;
 		});
 		this.servletRequest = new MockHttpServletRequest();
 		this.servletRequest.setAsyncSupported(true);
@@ -311,15 +306,10 @@ public class HttpTunnelServerTests {
 				.willThrow(new IllegalArgumentException());
 		final HttpConnection connection = new HttpConnection(request, this.response);
 		final AtomicBoolean responded = new AtomicBoolean();
-		Thread connectionThread = new Thread() {
-
-			@Override
-			public void run() {
-				connection.waitForResponse();
-				responded.set(true);
-			}
-
-		};
+		Thread connectionThread = new Thread(() -> {
+			connection.waitForResponse();
+			responded.set(true);
+		});
 		connectionThread.start();
 		assertThat(responded.get()).isFalse();
 		Thread.sleep(sleepBeforeResponse);

spring-boot-integration-tests/spring-boot-launch-script-tests/src/test/java/org/springframework/boot/launchscript/SysVinitLaunchScriptIT.java

@@ -18,7 +18,6 @@ package org.springframework.boot.launchscript;
 
 import java.io.File;
 import java.io.FileInputStream;
-import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -27,8 +26,6 @@ import java.util.List;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 
-import javax.ws.rs.client.ClientRequestContext;
-import javax.ws.rs.client.ClientRequestFilter;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.client.WebTarget;
 
@@ -449,15 +446,9 @@ public class SysVinitLaunchScriptIT {
 			extends DockerCmdExecFactoryImpl {
 
 		private SpringBootDockerCmdExecFactory() {
-			withClientRequestFilters(new ClientRequestFilter() {
-
-				@Override
-				public void filter(ClientRequestContext requestContext)
-						throws IOException {
-					// Workaround for https://go-review.googlesource.com/#/c/3821/
-					requestContext.getHeaders().add("Connection", "close");
-				}
-
+			withClientRequestFilters((requestContext) -> {
+				// Workaround for https://go-review.googlesource.com/#/c/3821/
+				requestContext.getHeaders().add("Connection", "close");
 			});
 		}