Use diamond operators

See gh-33987

buildSrc/src/main/java/org/springframework/boot/build/mavenplugin/PluginXmlParser.java

@@ -132,7 +132,7 @@ class PluginXmlParser {
 		@Override
 		public Iterator<Node> iterator() {
 
-			return new Iterator<Node>() {
+			return new Iterator<>() {
 
 				private int index = 0;
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundrySecurityService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -46,7 +46,7 @@ import org.springframework.web.reactive.function.client.WebClientResponseExcepti
  */
 class ReactiveCloudFoundrySecurityService {
 
-	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP = new ParameterizedTypeReference<Map<String, Object>>() {
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP = new ParameterizedTypeReference<>() {
 	};
 
 	private final WebClient webClient;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -174,7 +174,7 @@ class HealthEndpointConfiguration {
 				@Override
 				public Iterator<NamedContributor<HealthContributor>> iterator() {
 					Iterator<NamedContributor<ReactiveHealthContributor>> iterator = composite.iterator();
-					return new Iterator<NamedContributor<HealthContributor>>() {
+					return new Iterator<>() {
 
 						@Override
 						public boolean hasNext() {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/wavefront/MeterRegistrySpanMetricsTests.java

@@ -70,7 +70,7 @@ class MeterRegistrySpanMetricsTests {
 
 	@Test
 	void registerQueueSizeShouldCreateGauge() {
-		BlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(2);
+		BlockingQueue<Integer> queue = new ArrayBlockingQueue<>(2);
 		this.sut.registerQueueSize(queue);
 		assertThat(getGaugeValue("wavefront.reporter.queue.size")).isZero();
 		queue.offer(1);
@@ -79,7 +79,7 @@ class MeterRegistrySpanMetricsTests {
 
 	@Test
 	void registerQueueRemainingCapacityShouldCreateGauge() {
-		BlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(2);
+		BlockingQueue<Integer> queue = new ArrayBlockingQueue<>(2);
 		this.sut.registerQueueRemainingCapacity(queue);
 		assertThat(getGaugeValue("wavefront.reporter.queue.remaining_capacity")).isEqualTo(2);
 		queue.offer(1);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -40,7 +40,7 @@ class CompositeHealthContributorReactiveAdapter implements CompositeReactiveHeal
 	@Override
 	public Iterator<NamedContributor<ReactiveHealthContributor>> iterator() {
 		Iterator<NamedContributor<HealthContributor>> iterator = this.delegate.iterator();
-		return new Iterator<NamedContributor<ReactiveHealthContributor>>() {
+		return new Iterator<>() {
 
 			@Override
 			public boolean hasNext() {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -95,7 +95,7 @@ class DefaultContributorRegistry<C> implements ContributorRegistry<C> {
 	@Override
 	public Iterator<NamedContributor<C>> iterator() {
 		Iterator<Map.Entry<String, C>> iterator = this.contributors.entrySet().iterator();
-		return new Iterator<NamedContributor<C>>() {
+		return new Iterator<>() {
 
 			@Override
 			public boolean hasNext() {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -44,7 +44,7 @@ public interface NamedContributor<C> {
 	static <C> NamedContributor<C> of(String name, C contributor) {
 		Assert.notNull(name, "Name must not be null");
 		Assert.notNull(contributor, "Contributor must not be null");
-		return new NamedContributor<C>() {
+		return new NamedContributor<>() {
 
 			@Override
 			public String getName() {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -62,7 +62,7 @@ abstract class NamedContributorsMapAdapter<V, C> implements NamedContributors<C>
 	@Override
 	public Iterator<NamedContributor<C>> iterator() {
 		Iterator<Entry<String, C>> iterator = this.map.entrySet().iterator();
-		return new Iterator<NamedContributor<C>>() {
+		return new Iterator<>() {
 
 			@Override
 			public boolean hasNext() {

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

@@ -102,7 +102,7 @@ abstract class AbstractCacheAutoConfigurationTests {
 
 		@Bean
 		CacheManagerCustomizer<CouchbaseCacheManager> couchbaseCacheManagerCustomizer() {
-			return new CacheManagerTestCustomizer<CouchbaseCacheManager>() {
+			return new CacheManagerTestCustomizer<>() {
 
 			};
 		}
@@ -130,7 +130,7 @@ abstract class AbstractCacheAutoConfigurationTests {
 
 		@Bean
 		CacheManagerCustomizer<SpringCache2kCacheManager> cache2kCacheManagerCustomizer() {
-			return new CacheManagerTestCustomizer<SpringCache2kCacheManager>() {
+			return new CacheManagerTestCustomizer<>() {
 
 			};
 		}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -523,7 +523,7 @@ class JacksonAutoConfigurationTests {
 		@Bean
 		Module jacksonModule() {
 			SimpleModule module = new SimpleModule();
-			module.addSerializer(Foo.class, new JsonSerializer<Foo>() {
+			module.addSerializer(Foo.class, new JsonSerializer<>() {
 
 				@Override
 				public void serialize(Foo value, JsonGenerator jgen, SerializerProvider provider) throws IOException {

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/socket/NamedPipeSocket.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -113,7 +113,7 @@ public class NamedPipeSocket extends Socket {
 
 		@Override
 		public <A> void read(ByteBuffer dst, A attachment, CompletionHandler<Integer, ? super A> handler) {
-			this.fileChannel.read(dst, 0, attachment, new CompletionHandler<Integer, A>() {
+			this.fileChannel.read(dst, 0, attachment, new CompletionHandler<>() {
 
 				@Override
 				public void completed(Integer read, A attachment) {

spring-boot-project/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/PropertiesLauncherTests.java

@@ -406,7 +406,7 @@ class PropertiesLauncherTests {
 	}
 
 	private Condition<Archive> endingWith(String value) {
-		return new Condition<Archive>() {
+		return new Condition<>() {
 
 			@Override
 			public boolean matches(Archive archive) {

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/MavenBuild.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -130,7 +130,7 @@ class MavenBuild {
 		try {
 			Path destination = this.temp.toPath();
 			Path source = this.projectDir.toPath();
-			Files.walkFileTree(source, new SimpleFileVisitor<Path>() {
+			Files.walkFileTree(source, new SimpleFileVisitor<>() {
 
 				@Override
 				public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/BootstrapRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -123,7 +123,7 @@ public interface BootstrapRegistry {
 		default InstanceSupplier<T> withScope(Scope scope) {
 			Assert.notNull(scope, "Scope must not be null");
 			InstanceSupplier<T> parent = this;
-			return new InstanceSupplier<T>() {
+			return new InstanceSupplier<>() {
 
 				@Override
 				public T get(BootstrapContext context) {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigDataEnvironmentPostProcessorIntegrationTests.java

@@ -814,7 +814,7 @@ class ConfigDataEnvironmentPostProcessorIntegrationTests {
 	}
 
 	private Condition<ConfigurableEnvironment> matchingPropertySource(final String sourceName) {
-		return new Condition<ConfigurableEnvironment>("environment containing property source " + sourceName) {
+		return new Condition<>("environment containing property source " + sourceName) {
 
 			@Override
 			public boolean matches(ConfigurableEnvironment value) {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/JavaBeanBinderTests.java

@@ -507,7 +507,7 @@ class JavaBeanBinderTests {
 	void beanPropertiesPreferMatchingType() {
 		// gh-16206
 		ResolvableType type = ResolvableType.forClass(PropertyWithOverloadedSetter.class);
-		Bean<PropertyWithOverloadedSetter> bean = new Bean<PropertyWithOverloadedSetter>(type, type.resolve()) {
+		Bean<PropertyWithOverloadedSetter> bean = new Bean<>(type, type.resolve()) {
 
 			@Override
 			protected void addProperties(Method[] declaredMethods, Field[] declaredFields) {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/SpringConfigurationPropertySourceTests.java

@@ -105,7 +105,7 @@ class SpringConfigurationPropertySourceTests {
 
 	@Test
 	void fromWhenNonEnumerableShouldReturnNonIterable() {
-		PropertySource<?> propertySource = new PropertySource<Object>("test", new Object()) {
+		PropertySource<?> propertySource = new PropertySource<>("test", new Object()) {
 
 			@Override
 			public Object getProperty(String name) {
@@ -120,7 +120,7 @@ class SpringConfigurationPropertySourceTests {
 
 	@Test
 	void fromWhenEnumerableButRestrictedShouldReturnNonIterable() {
-		Map<String, Object> source = new LinkedHashMap<String, Object>() {
+		Map<String, Object> source = new LinkedHashMap<>() {
 
 			@Override
 			public int size() {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/security/servlet/ApplicationContextRequestMatcherTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -86,7 +86,7 @@ class ApplicationContextRequestMatcherTests {
 	@Test
 	void initializeAndMatchesAreNotCalledIfContextIsIgnored() {
 		StaticWebApplicationContext context = createWebApplicationContext();
-		TestApplicationContextRequestMatcher<ApplicationContext> matcher = new TestApplicationContextRequestMatcher<ApplicationContext>(
+		TestApplicationContextRequestMatcher<ApplicationContext> matcher = new TestApplicationContextRequestMatcher<>(
 				ApplicationContext.class) {
 
 			@Override

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -68,7 +68,7 @@ abstract class AbstractLaunchScriptIntegrationTests {
 
 	protected Condition<String> coloredString(AnsiColor color, String string) {
 		String colorString = ESC + "[0;" + color + "m" + string + ESC + "[0m";
-		return new Condition<String>() {
+		return new Condition<>() {
 
 			@Override
 			public boolean matches(String value) {

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-hazelcast/src/test/java/smoketest/session/hazelcast/SampleSessionHazelcastApplicationTests.java

@@ -80,7 +80,7 @@ class SampleSessionHazelcastApplicationTests {
 		headers.set("Authorization", getBasicAuth());
 		RequestEntity<Object> request = new RequestEntity<>(headers, HttpMethod.GET,
 				URI.create("/actuator/sessions?username=user"));
-		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<Map<String, Object>>() {
+		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<>() {
 		};
 		return this.restTemplate.exchange(request, stringObjectMap);
 	}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-jdbc/src/test/java/smoketest/session/SampleSessionJdbcApplicationTests.java

@@ -115,7 +115,7 @@ class SampleSessionJdbcApplicationTests {
 		HttpHeaders headers = getHeaders(null);
 		RequestEntity<Object> request = new RequestEntity<>(headers, HttpMethod.GET,
 				URI.create("/actuator/sessions?username=user"));
-		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<Map<String, Object>>() {
+		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<>() {
 		};
 		return this.restTemplate.exchange(request, stringObjectMap);
 	}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-redis/src/test/java/smoketest/session/redis/SampleSessionRedisApplicationTests.java

@@ -96,7 +96,7 @@ class SampleSessionRedisApplicationTests {
 
 	private ResponseEntity<Map<String, Object>> getSessions() {
 		RequestEntity<Object> request = getRequestEntity(URI.create("/actuator/sessions?username=user"));
-		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<Map<String, Object>>() {
+		ParameterizedTypeReference<Map<String, Object>> stringObjectMap = new ParameterizedTypeReference<>() {
 		};
 		return this.restTemplate.exchange(request, stringObjectMap);
 	}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-groovy-templates/src/main/java/smoketest/groovytemplates/SampleGroovyTemplateApplication.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -31,7 +31,7 @@ public class SampleGroovyTemplateApplication {
 
 	@Bean
 	public Converter<String, Message> messageConverter() {
-		return new Converter<String, Message>() {
+		return new Converter<>() {
 			@Override
 			public Message convert(String id) {
 				return messageRepository().findMessage(Long.valueOf(id));

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-web-thymeleaf/src/main/java/smoketest/web/thymeleaf/SampleWebUiApplication.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -31,7 +31,7 @@ public class SampleWebUiApplication {
 
 	@Bean
 	public Converter<String, Message> messageConverter() {
-		return new Converter<String, Message>() {
+		return new Converter<>() {
 			@Override
 			public Message convert(String id) {
 				return messageRepository().findMessage(Long.valueOf(id));