50_创建动态类及查看其方法列表信息

package com.itcast.day3;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Collection;

public class ProxyTest {
    public static void main(String[] args)throws Exception {
        Class clazzProxy1=Proxy.getProxyClass(Collection.class.getClassLoader(), Collection.class);
        System.out.println(clazzProxy1.getName());//com.sun.proxy.$Proxy0
        
        
        /****打印动态生成的代理类的构造器列表*****/
        /**
         * $Proxy0()
         * $Proxy0(InvoketionHandler)
         */
        System.out.println("--------begin constructors list----------");
        Constructor[] constructors=clazzProxy1.getConstructors();
        for(Constructor constructor:constructors){
            String name=constructor.getName();
            StringBuilder sb=new StringBuilder(name);
            sb.append("(");
            Class[] clazzParams=constructor.getParameterTypes();
            for(Class clazz:clazzParams){
                sb.append(clazz.getName());
                sb.append(',');
            }
            if(clazzParams!=null&&clazzParams.length!=0)
            sb.deleteCharAt(sb.length()-1);
            sb.append(")");
            System.out.println(sb);
        }
        /**只有一个有参数的构造器
          --------begin constructors list----------
          com.sun.proxy.$Proxy0(java.lang.reflect.InvocationHandler)
         */
        
        
        
        /****打印动态生成的代理类的方法列表*****/
        System.out.println("--------begin methods list----------");
        Method[] methods=clazzProxy1.getMethods();
        for(Method method:methods){
            String name=method.getName();
            StringBuilder sb=new StringBuilder(name);
            sb.append("(");
            Class[] clazzParams=method.getParameterTypes();
            for(Class clazz:clazzParams){
                sb.append(clazz.getName());
                sb.append(',');
            }
            if(clazzParams!=null&&clazzParams.length!=0)
            sb.deleteCharAt(sb.length()-1);
            sb.append(")");
            System.out.println(sb);
        }
        
        /**
         * 都是Collection和Object里的方法
         * --------begin methods list----------
        add(java.lang.Object)
        equals(java.lang.Object)  这三个派发给InvocationHandler，而其他方法如getClass()由Proxy自己实现
        toString()
        hashCode()
        clear()
        contains(java.lang.Object)
        isEmpty()
        addAll(java.util.Collection)
        iterator()
        size()
        toArray([Ljava.lang.Object;)
        toArray()
        remove(java.lang.Object)
        containsAll(java.util.Collection)
        removeAll(java.util.Collection)
        retainAll(java.util.Collection)
        isProxyClass(java.lang.Class)
        getProxyClass(java.lang.ClassLoader,[Ljava.lang.Class;)
        getInvocationHandler(java.lang.Object)
        newProxyInstance(java.lang.ClassLoader,[Ljava.lang.Class;,java.lang.reflect.InvocationHandler)
        wait(long)
        wait()
        wait(long,int)
        getClass()
        notify()
        notifyAll()
         */
    }
}