Use Class#arrayType() where feasible

Closes gh-31002

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

@@ -149,7 +149,7 @@ class TypeConverterDelegate {
 							convertedValue = StringUtils.commaDelimitedListToStringArray(text);
 						}
 						if (editor == null && String.class != elementType) {
-							editor = findDefaultEditor(Array.newInstance(elementType, 0).getClass());
+							editor = findDefaultEditor(elementType.arrayType());
 						}
 					}
 				}

spring-core/src/main/java/org/springframework/core/ResolvableType.java

@@ -1373,8 +1373,8 @@ public class ResolvableType implements Serializable {
 	 */
 	public static ResolvableType forArrayComponent(ResolvableType componentType) {
 		Assert.notNull(componentType, "Component type must not be null");
-		Class<?> arrayClass = Array.newInstance(componentType.resolve(), 0).getClass();
-		return new ResolvableType(arrayClass, componentType, null, null);
+		Class<?> arrayType = componentType.resolve().arrayType();
+		return new ResolvableType(arrayType, componentType, null, null);
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/annotation/AbstractMergedAnnotation.java

@@ -17,7 +17,6 @@
 package org.springframework.core.annotation;
 
 import java.lang.annotation.Annotation;
-import java.lang.reflect.Array;
 import java.util.NoSuchElementException;
 import java.util.Optional;
 import java.util.function.Predicate;
@@ -164,8 +163,7 @@ abstract class AbstractMergedAnnotation<A extends Annotation> implements MergedA
 	@SuppressWarnings("unchecked")
 	public <E extends Enum<E>> E[] getEnumArray(String attributeName, Class<E> type) {
 		Assert.notNull(type, "Type must not be null");
-		Class<?> arrayType = Array.newInstance(type, 0).getClass();
-		return (E[]) getRequiredAttributeValue(attributeName, arrayType);
+		return (E[]) getRequiredAttributeValue(attributeName, type.arrayType());
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/core/annotation/AnnotationAttributes.java

@@ -327,8 +327,7 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	 */
 	@SuppressWarnings("unchecked")
 	public <A extends Annotation> A[] getAnnotationArray(String attributeName, Class<A> annotationType) {
-		Object array = Array.newInstance(annotationType, 0);
-		return (A[]) getRequiredAttribute(attributeName, array.getClass());
+		return (A[]) getRequiredAttribute(attributeName, annotationType.arrayType());
 	}
 
 	/**

spring-core/src/main/java/org/springframework/core/convert/support/GenericConversionService.java

@@ -16,7 +16,6 @@
 
 package org.springframework.core.convert.support;
 
-import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Deque;
@@ -584,7 +583,7 @@ public class GenericConversionService implements ConfigurableConversionService {
 				List<Class<?>> hierarchy, Set<Class<?>> visited) {
 
 			if (asArray) {
-				type = Array.newInstance(type, 0).getClass();
+				type = type.arrayType();
 			}
 			if (visited.add(type)) {
 				hierarchy.add(index, type);

spring-core/src/main/java/org/springframework/util/ClassUtils.java

@@ -20,7 +20,6 @@ import java.io.Closeable;
 import java.io.Externalizable;
 import java.io.File;
 import java.io.Serializable;
-import java.lang.reflect.Array;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
@@ -273,21 +272,21 @@ public abstract class ClassUtils {
 		if (name.endsWith(ARRAY_SUFFIX)) {
 			String elementClassName = name.substring(0, name.length() - ARRAY_SUFFIX.length());
 			Class<?> elementClass = forName(elementClassName, classLoader);
-			return Array.newInstance(elementClass, 0).getClass();
+			return elementClass.arrayType();
 		}
 
 		// "[Ljava.lang.String;" style arrays
 		if (name.startsWith(NON_PRIMITIVE_ARRAY_PREFIX) && name.endsWith(";")) {
 			String elementName = name.substring(NON_PRIMITIVE_ARRAY_PREFIX.length(), name.length() - 1);
 			Class<?> elementClass = forName(elementName, classLoader);
-			return Array.newInstance(elementClass, 0).getClass();
+			return elementClass.arrayType();
 		}
 
 		// "[[I" or "[[Ljava.lang.String;" style arrays
 		if (name.startsWith(INTERNAL_ARRAY_PREFIX)) {
 			String elementName = name.substring(INTERNAL_ARRAY_PREFIX.length());
 			Class<?> elementClass = forName(elementName, classLoader);
-			return Array.newInstance(elementClass, 0).getClass();
+			return elementClass.arrayType();
 		}
 
 		ClassLoader clToUse = classLoader;