Consistent Lock field declaration (instead of ReentrantLock field type)

spring-context/src/main/java/org/springframework/context/support/ReloadableResourceBundleMessageSource.java

@@ -28,6 +28,7 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
 import org.springframework.context.ResourceLoaderAware;
@@ -650,7 +651,7 @@ public class ReloadableResourceBundleMessageSource extends AbstractResourceBased
 
 		private volatile long refreshTimestamp = -2;
 
-		private final ReentrantLock refreshLock = new ReentrantLock();
+		private final Lock refreshLock = new ReentrantLock();
 
 		/** Cache to hold already generated MessageFormats per message code. */
 		private final ConcurrentMap<String, Map<Locale, MessageFormat>> cachedMessageFormats =

spring-context/src/main/java/org/springframework/scheduling/concurrent/ExecutorLifecycleDelegate.java

@@ -18,6 +18,7 @@ package org.springframework.scheduling.concurrent;
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
 import org.springframework.context.SmartLifecycle;
@@ -36,7 +37,7 @@ final class ExecutorLifecycleDelegate implements SmartLifecycle {
 
 	private final ExecutorService executor;
 
-	private final ReentrantLock pauseLock = new ReentrantLock();
+	private final Lock pauseLock = new ReentrantLock();
 
 	private final Condition unpaused = this.pauseLock.newCondition();