Fix checkstyle issues and compiler warnings.

Author: LeMikaelF

spring-aop/src/main/java/org/springframework/aop/framework/CglibAopProxy.java

@@ -19,7 +19,6 @@
 import java.io.Serializable;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
-import java.lang.reflect.UndeclaredThrowableException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -54,7 +53,6 @@
 import org.springframework.util.ClassUtils;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
-import org.springframework.util.ReflectionUtils;
 
 /**
  * CGLIB-based {@link AopProxy} implementation for the Spring AOP framework.

spring-aop/src/test/java/org/springframework/aop/framework/ProxyExceptionHandlingTests.java

@@ -1,26 +1,41 @@
-package org.springframework.aop.framework;
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
-import static java.util.Objects.requireNonNull;
-import static org.mockito.Mockito.doAnswer;
-import static org.mockito.Mockito.doThrow;
-import static org.mockito.Mockito.mock;
+package org.springframework.aop.framework;
 
+import java.io.Serial;
 import java.lang.reflect.Proxy;
 import java.lang.reflect.UndeclaredThrowableException;
-import java.util.Collection;
-import java.util.Set;
+import java.util.Objects;
 
-import org.aopalliance.aop.Advice;
 import org.aopalliance.intercept.MethodInterceptor;
 import org.assertj.core.api.WithAssertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 import org.mockito.stubbing.Answer;
+
 import org.springframework.cglib.proxy.Enhancer;
 import org.springframework.lang.Nullable;
 
+import static org.mockito.BDDMockito.doAnswer;
+import static org.mockito.BDDMockito.doThrow;
+import static org.mockito.BDDMockito.mock;
+
 abstract class ProxyExceptionHandlingTests implements WithAssertions {
 
 	private static final RuntimeException uncheckedException = new RuntimeException();
@@ -35,7 +50,7 @@ abstract class ProxyExceptionHandlingTests implements WithAssertions {
 	@Nullable
 	private Throwable throwableSeenByCaller;
 
-	static class ObjenesisCglibAopProxyTest extends ProxyExceptionHandlingTests {
+	static class ObjenesisCglibAopProxyTests extends ProxyExceptionHandlingTests {
 		@BeforeEach
 		void beforeEach() {
 			proxyFactory.setProxyTargetClass(true);
@@ -47,14 +62,15 @@ protected void assertProxyType(Object proxy) {
 		}
 	}
 
-	static class JdkAopProxyTest extends ProxyExceptionHandlingTests {
+	static class JdkAopProxyTests extends ProxyExceptionHandlingTests {
 		@Override
 		protected void assertProxyType(Object proxy) {
 			assertThat(Proxy.isProxyClass(proxy.getClass())).isTrue();
 		}
 	}
 
-	protected void assertProxyType(Object proxy) {};
+	protected void assertProxyType(Object proxy) {
+	}
 
 	@BeforeEach
 	void beforeEach() {
@@ -112,7 +128,8 @@ private MethodInterceptor captureThrowable() {
 			return invocation -> {
 				try {
 					return invocation.proceed();
-				} catch (Exception e) {
+				}
+				catch (Exception e) {
 					throwableSeenByInterceptor = e;
 					throw e;
 				}
@@ -161,7 +178,7 @@ void targetThrowsUncheckedException() throws DeclaredCheckedException {
 	}
 
 	private void invokeProxy() {
-		throwableSeenByCaller = catchThrowable(() -> requireNonNull(proxy).doSomething());
+		throwableSeenByCaller = catchThrowable(() -> Objects.requireNonNull(proxy).doSomething());
 	}
 
 	private Answer<?> sneakyThrow(@SuppressWarnings("SameParameterValue") Throwable throwable) {
@@ -182,9 +199,13 @@ protected interface MyInterface {
 	}
 
 	protected static class UndeclaredCheckedException extends Exception {
+		@Serial
+		private static final long serialVersionUID = -4199611059122356651L;
 	}
 
 	protected static class DeclaredCheckedException extends Exception {
+		@Serial
+		private static final long serialVersionUID = 8851375818059230518L;
 	}
 
 }