Replace explicit generic type with diamond operator

See gh-15424

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnBeanTests.java

@@ -439,7 +439,7 @@ public class ConditionalOnBeanTests {
 
 		@Bean
 		public TestParameterizedContainer<OtherExampleBean> otherExampleBean() {
-			return new TestParameterizedContainer<OtherExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}
@@ -449,7 +449,7 @@ public class ConditionalOnBeanTests {
 
 		@Bean
 		public TestParameterizedContainer<CustomExampleBean> customExampleBean() {
-			return new TestParameterizedContainer<CustomExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}
@@ -482,7 +482,7 @@ public class ConditionalOnBeanTests {
 		@Bean
 		@ConditionalOnBean(parameterizedContainer = TestParameterizedContainer.class)
 		public TestParameterizedContainer<CustomExampleBean> conditionalCustomExampleBean() {
-			return new TestParameterizedContainer<CustomExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanTests.java

@@ -741,7 +741,7 @@ public class ConditionalOnMissingBeanTests {
 
 		@Bean
 		public TestParameterizedContainer<OtherExampleBean> otherExampleBean() {
-			return new TestParameterizedContainer<OtherExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}
@@ -751,7 +751,7 @@ public class ConditionalOnMissingBeanTests {
 
 		@Bean
 		public TestParameterizedContainer<CustomExampleBean> customExampleBean() {
-			return new TestParameterizedContainer<CustomExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}
@@ -784,7 +784,7 @@ public class ConditionalOnMissingBeanTests {
 		@Bean
 		@ConditionalOnMissingBean(parameterizedContainer = TestParameterizedContainer.class)
 		public TestParameterizedContainer<CustomExampleBean> conditionalCustomExampleBean() {
-			return new TestParameterizedContainer<CustomExampleBean>();
+			return new TestParameterizedContainer<>();
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationServletIntegrationTests.java

@@ -243,7 +243,7 @@ public class FreeMarkerAutoConfigurationServletIntegrationTests {
 
 		@Bean
 		public FilterRegistrationBean<ResourceUrlEncodingFilter> filterRegistration() {
-			FilterRegistrationBean<ResourceUrlEncodingFilter> bean = new FilterRegistrationBean<ResourceUrlEncodingFilter>(
+			FilterRegistrationBean<ResourceUrlEncodingFilter> bean = new FilterRegistrationBean<>(
 					new ResourceUrlEncodingFilter());
 			bean.setDispatcherTypes(EnumSet.of(DispatcherType.INCLUDE));
 			return bean;
@@ -257,7 +257,7 @@ public class FreeMarkerAutoConfigurationServletIntegrationTests {
 
 		@Bean
 		public FilterRegistrationBean<OrderedCharacterEncodingFilter> filterRegistration() {
-			return new FilterRegistrationBean<OrderedCharacterEncodingFilter>(
+			return new FilterRegistrationBean<>(
 					new OrderedCharacterEncodingFilter());
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafServletAutoConfigurationTests.java

@@ -358,7 +358,7 @@ public class ThymeleafServletAutoConfigurationTests {
 
 		@Bean
 		public FilterRegistrationBean<ResourceUrlEncodingFilter> filterRegistration() {
-			FilterRegistrationBean<ResourceUrlEncodingFilter> bean = new FilterRegistrationBean<ResourceUrlEncodingFilter>(
+			FilterRegistrationBean<ResourceUrlEncodingFilter> bean = new FilterRegistrationBean<>(
 					new ResourceUrlEncodingFilter());
 			bean.setDispatcherTypes(EnumSet.of(DispatcherType.INCLUDE));
 			return bean;
@@ -372,7 +372,7 @@ public class ThymeleafServletAutoConfigurationTests {
 
 		@Bean
 		public FilterRegistrationBean<OrderedCharacterEncodingFilter> filterRegistration() {
-			return new FilterRegistrationBean<OrderedCharacterEncodingFilter>(
+			return new FilterRegistrationBean<>(
 					new OrderedCharacterEncodingFilter());
 		}
 

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

@@ -154,7 +154,7 @@ public class ConditionalOnMissingFilterBeanTests {
 
 		@Bean
 		public FilterRegistrationBean<OtherFilter> myOtherFilter() {
-			return new FilterRegistrationBean<OtherFilter>(new OtherFilter());
+			return new FilterRegistrationBean<>(new OtherFilter());
 		}
 
 	}
@@ -164,7 +164,7 @@ public class ConditionalOnMissingFilterBeanTests {
 
 		@Bean
 		public FilterRegistrationBean<TestFilter> myTestFilter() {
-			return new FilterRegistrationBean<TestFilter>(new TestFilter());
+			return new FilterRegistrationBean<>(new TestFilter());
 		}
 
 	}
@@ -197,7 +197,7 @@ public class ConditionalOnMissingFilterBeanTests {
 		@Bean
 		@ConditionalOnMissingFilterBean
 		public FilterRegistrationBean<TestFilter> testFilter() {
-			return new FilterRegistrationBean<TestFilter>(new TestFilter());
+			return new FilterRegistrationBean<>(new TestFilter());
 		}
 
 	}

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

@@ -50,7 +50,7 @@ public class FileSystemWatcherTests {
 	private FileSystemWatcher watcher;
 
 	private List<Set<ChangedFiles>> changes = Collections
-			.synchronizedList(new ArrayList<Set<ChangedFiles>>());
+			.synchronizedList(new ArrayList<>());
 
 	@Rule
 	public TemporaryFolder temp = new TemporaryFolder();

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/servlet/mockmvc/HateoasController.java

@@ -35,7 +35,7 @@ class HateoasController {
 
 	@RequestMapping("/resource")
 	public Resource<Map<String, String>> resource() {
-		return new Resource<>(new HashMap<String, String>(),
+		return new Resource<>(new HashMap<>(),
 				new Link("self", "http://api.example.com"));
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConversionServiceDeducer.java

@@ -81,7 +81,7 @@ class ConversionServiceDeducer {
 
 		private <T> List<T> beans(Class<T> type, String qualifier,
 				ListableBeanFactory beanFactory) {
-			return new ArrayList<T>(BeanFactoryAnnotationUtils
+			return new ArrayList<>(BeanFactoryAnnotationUtils
 					.qualifiedBeansOfType(beanFactory, type, qualifier).values());
 		}