有构造函数

//package com.nowjava;

/* 
 来自 
*nowjava.com*/

public class Main {

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

        Class clazz = String.class;

        Class paramType = String.class;

        System.out.println(hasConstructor(clazz, paramType));

    }


    public static boolean hasConstructor(Class clazz, Class paramType) {

        try {

            clazz.getConstructor(new Class[] { paramType });

            return true;

        }