对list代理扩展功能

package 动态代理扩展List;



import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Method;

import java.lang.reflect.Proxy;

import java.util.ArrayList;

import java.util.List;



public class ListPro {



    public static void main(String[] args) {



        final List<Object> list = new ArrayList<Object>();

        // 对list代理



        Object lis = Proxy.newProxyInstance(ListPro.class.getClassLoader(),



        new Class[] { List.class }, new InvocationHandler() {



            @Override

            public Object invoke(Object proxy, Method method, Object[] args)

                    throws Throwable {

                // 显示参数

                if (method.getName().equals("add")) {



                    System.err.println("参数" + args[0]);



                }

                // diaoyong

                return method.invoke(list, args);

            }

        });

        // 转换



        List<Object> l = (List<Object>) lis;

        l.add("kk");

        System.err.println("size:" + l.size() + "," + list.size());

        System.err.println("-----------");

        list.add("xx");

        System.err.println("size2:" + l.size() + "," + list.size());

        System.err.println("========");



        for (Object ls : l) {

            System.err.println(ls);



        }

    }

}