Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *      http://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 java.util.HashMap;

import java.util.Map;

public class Main {
    /**
     * Maps primitive {@code Class}es to their corresponding wrapper {@code Class}.
     */
    private static final Map<Class<?>, Class<?>> primitiveWrapperMap = new HashMap<Class<?>, Class<?>>();

    /**
     * <p>Converts the specified array of primitive Class objects to an array of
     * its corresponding wrapper Class objects.</p>
     *
     * @param classes  the class array to convert, may be null or empty
     * @return an array which contains for each given class, the wrapper class or
     * the original class if class is not a primitive. {@code null} if null input.
     * Empty array if an empty array passed in.
     * @since 2.1
     */
    public static Class<?>[] primitivesToWrappers(final Class<?>... classes) {
        if (classes == null) {
            return null;
        }

        if (classes.length == 0) {
            return classes;
        }

        final Class<?>[] convertedClasses = new Class[classes.length];
        for (int i = 0; i < classes.length; i++) {
            convertedClasses[i] = primitiveToWrapper(classes[i]);
        }
        return convertedClasses;
    }

    /**
     * <p>Converts the specified primitive Class object to its corresponding
     * wrapper Class object.</p>
     *
     * <p>NOTE: From v2.2, this method handles {@code Void.TYPE},
     * returning {@code Void.TYPE}.</p>
     *
     * @param cls  the class to convert, may be null
     * @return the wrapper class for {@code cls} or {@code cls} if
     * {@code cls} is not a primitive. {@code null} if null input.
     * @since 2.1
     */
    public static Class<?> primitiveToWrapper(final Class<?> cls) {
        Class<?> convertedClass = cls;
        if (cls != null && cls.isPrimitive()) {
            convertedClass = primitiveWrapperMap.get(cls);
        }
        return convertedClass;
    }
}