Consistently use class literals for primitive types

To improve consistency and avoid confusion regarding primitive types
and their wrapper types, this commit ensures that we always use class
literals for primitive types.

For example, instead of using the `Void.TYPE` constant, we now
consistently use `void.class`.

spring-web/src/test/java/org/springframework/web/method/annotation/WebArgumentResolverAdapterTests.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.
@@ -53,7 +53,7 @@ class WebArgumentResolverAdapterTests {
 
 	@BeforeEach
 	void setUp() throws Exception {
-		parameter = new MethodParameter(getClass().getMethod("handle", Integer.TYPE), 0);
+		parameter = new MethodParameter(getClass().getMethod("handle", int.class), 0);
 
 		// Expose request to the current thread (for SpEL expressions)
 		RequestContextHolder.setRequestAttributes(webRequest);