Polishing

(cherry picked from commit 20dea0dae2)

spring-context/src/main/java/org/springframework/format/datetime/standard/InstantFormatter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -41,12 +41,12 @@ public class InstantFormatter implements Formatter<Instant> {
 
 	@Override
 	public Instant parse(String text, Locale locale) throws ParseException {
-		if (text.length() > 0 && Character.isAlphabetic(text.charAt(0))) {
+		if (!text.isEmpty() && Character.isAlphabetic(text.charAt(0))) {
 			// assuming RFC-1123 value a la "Tue, 3 Jun 2008 11:05:30 GMT"
 			return Instant.from(DateTimeFormatter.RFC_1123_DATE_TIME.parse(text));
 		}
 		else {
-			// assuming UTC instant a la "2007-12-03T10:15:30.00Z"
+			// assuming UTC instant a la "2007-12-03T10:15:30.000Z"
 			return Instant.parse(text);
 		}
 	}

spring-context/src/test/java/org/springframework/format/datetime/DateFormattingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -52,7 +52,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Juergen Hoeller
  * @author Sam Brannen
  */
-public class DateFormattingTests {
+class DateFormattingTests {
 
 	private final FormattingConversionService conversionService = new FormattingConversionService();
 

spring-context/src/test/java/org/springframework/format/datetime/standard/DateTimeFormattingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -512,7 +512,7 @@ class DateTimeFormattingTests {
 	}
 
 	@Test
-	public void testBindYearMonthAnnotatedPattern() {
+	void testBindYearMonthAnnotatedPattern() {
 		MutablePropertyValues propertyValues = new MutablePropertyValues();
 		propertyValues.add("yearMonthAnnotatedPattern", "12/2007");
 		binder.bind(propertyValues);
@@ -531,7 +531,7 @@ class DateTimeFormattingTests {
 	}
 
 	@Test
-	public void testBindMonthDayAnnotatedPattern() {
+	void testBindMonthDayAnnotatedPattern() {
 		MutablePropertyValues propertyValues = new MutablePropertyValues();
 		propertyValues.add("monthDayAnnotatedPattern", "1/3");
 		binder.bind(propertyValues);
@@ -631,10 +631,10 @@ class DateTimeFormattingTests {
 		@DateTimeFormat(style = "M-")
 		private LocalDate styleLocalDate;
 
-		@DateTimeFormat(style = "S-", fallbackPatterns = { "yyyy-MM-dd", "yyyyMMdd", "yyyy.MM.dd" })
+		@DateTimeFormat(style = "S-", fallbackPatterns = {"yyyy-MM-dd", "yyyyMMdd", "yyyy.MM.dd"})
 		private LocalDate styleLocalDateWithFallbackPatterns;
 
-		@DateTimeFormat(pattern = "yyyy-MM-dd", fallbackPatterns = { "M/d/yy", "yyyyMMdd", "yyyy.MM.dd" })
+		@DateTimeFormat(pattern = "yyyy-MM-dd", fallbackPatterns = {"M/d/yy", "yyyyMMdd", "yyyy.MM.dd"})
 		private LocalDate patternLocalDateWithFallbackPatterns;
 
 		private LocalTime localTime;
@@ -642,7 +642,7 @@ class DateTimeFormattingTests {
 		@DateTimeFormat(style = "-M")
 		private LocalTime styleLocalTime;
 
-		@DateTimeFormat(style = "-M", fallbackPatterns = { "HH:mm:ss", "HH:mm"})
+		@DateTimeFormat(style = "-M", fallbackPatterns = {"HH:mm:ss", "HH:mm"})
 		private LocalTime styleLocalTimeWithFallbackPatterns;
 
 		private LocalDateTime localDateTime;
@@ -662,7 +662,7 @@ class DateTimeFormattingTests {
 		@DateTimeFormat(iso = ISO.DATE_TIME)
 		private LocalDateTime isoLocalDateTime;
 
-		@DateTimeFormat(iso = ISO.DATE_TIME, fallbackPatterns = { "yyyy-MM-dd HH:mm:ss", "M/d/yy HH:mm"})
+		@DateTimeFormat(iso = ISO.DATE_TIME, fallbackPatterns = {"yyyy-MM-dd HH:mm:ss", "M/d/yy HH:mm"})
 		private LocalDateTime isoLocalDateTimeWithFallbackPatterns;
 
 		private Instant instant;

spring-context/src/test/java/org/springframework/format/datetime/standard/InstantFormatterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -19,6 +19,7 @@ package org.springframework.format.datetime.standard;
 import java.text.ParseException;
 import java.time.Instant;
 import java.time.format.DateTimeFormatter;
+import java.util.Locale;
 import java.util.Random;
 import java.util.stream.Stream;
 
@@ -49,13 +50,12 @@ class InstantFormatterTests {
 
 	private final InstantFormatter instantFormatter = new InstantFormatter();
 
+
 	@ParameterizedTest
 	@ArgumentsSource(ISOSerializedInstantProvider.class)
 	void should_parse_an_ISO_formatted_string_representation_of_an_Instant(String input) throws ParseException {
 		Instant expected = DateTimeFormatter.ISO_INSTANT.parse(input, Instant::from);
-
-		Instant actual = instantFormatter.parse(input, null);
-
+		Instant actual = instantFormatter.parse(input, Locale.US);
 		assertThat(actual).isEqualTo(expected);
 	}
 
@@ -63,9 +63,7 @@ class InstantFormatterTests {
 	@ArgumentsSource(RFC1123SerializedInstantProvider.class)
 	void should_parse_an_RFC1123_formatted_string_representation_of_an_Instant(String input) throws ParseException {
 		Instant expected = DateTimeFormatter.RFC_1123_DATE_TIME.parse(input, Instant::from);
-
-		Instant actual = instantFormatter.parse(input, null);
-
+		Instant actual = instantFormatter.parse(input, Locale.US);
 		assertThat(actual).isEqualTo(expected);
 	}
 
@@ -73,12 +71,11 @@ class InstantFormatterTests {
 	@ArgumentsSource(RandomInstantProvider.class)
 	void should_serialize_an_Instant_using_ISO_format_and_ignoring_Locale(Instant input) {
 		String expected = DateTimeFormatter.ISO_INSTANT.format(input);
-
-		String actual = instantFormatter.print(input, null);
-
+		String actual = instantFormatter.print(input, Locale.US);
 		assertThat(actual).isEqualTo(expected);
 	}
 
+
 	private static class RandomInstantProvider implements ArgumentsProvider {
 
 		private static final long DATA_SET_SIZE = 10;
@@ -100,6 +97,7 @@ class InstantFormatterTests {
 		}
 	}
 
+
 	private static class ISOSerializedInstantProvider extends RandomInstantProvider {
 
 		@Override
@@ -108,6 +106,7 @@ class InstantFormatterTests {
 		}
 	}
 
+
 	private static class RFC1123SerializedInstantProvider extends RandomInstantProvider {
 
 		// RFC-1123 supports only 4-digit years