尝试找到给定类的默认构造函数

/**

 * Copyright 2008-2009 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:

 *

 * 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. 

 */

//package com.nowjava;
/*
时 代 J a v a 公 众 号 提供
*/


import java.lang.reflect.Constructor;


public class Main {

    public static void main(String[] argv) throws Exception {

        Class clazz = String.class;

        System.out.println(findDefaultConstructor(clazz));

    }


    /**

     * Attempts to locate the default constructor of the given class

     *

     * @param clazz - the class to search

     * @return the default constructor or null if not found

     */

    public static Constructor findDefaultConstructor(Class clazz) {

        Constructor[] constructors = clazz.getDeclaredConstructors();

        for (int i = 0; i < constructors.length; i++) {

            Constructor constructor =