Use Method.getParameterCount() when full type array is never needed

Author: jhoeller

spring-beans/src/main/java/org/springframework/beans/PropertyDescriptorUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -66,8 +66,7 @@ public static Class<?> findPropertyType(@Nullable Method readMethod, @Nullable M
 		Class<?> propertyType = null;
 
 		if (readMethod != null) {
-			Class<?>[] params = readMethod.getParameterTypes();
-			if (params.length != 0) {
+			if (readMethod.getParameterCount() != 0) {
 				throw new IntrospectionException("Bad read method arg count: " + readMethod);
 			}
 			propertyType = readMethod.getReturnType();

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

@@ -311,9 +311,9 @@ private Method findDestroyMethod(String name) {
 	 * assuming a "force" parameter), else logging an error.
 	 */
 	private void invokeCustomDestroyMethod(final Method destroyMethod) {
-		Class<?>[] paramTypes = destroyMethod.getParameterTypes();
-		final Object[] args = new Object[paramTypes.length];
-		if (paramTypes.length == 1) {
+		int paramCount = destroyMethod.getParameterCount();
+		final Object[] args = new Object[paramCount];
+		if (paramCount == 1) {
 			args[0] = Boolean.TRUE;
 		}
 		if (logger.isTraceEnabled()) {