package ProxyTest;//接口的应用:代理模式public class NetWorkTest {public static void main(String[] args) {Server se = new Server();new ProxyServer(se).browse();}
}interface NetWork{void browse();
}//被代理类
class Server implements NetWork{@Overridepublic void browse() {System.out.println("真正服务器工作");}}//代理类
class ProxyServer implements NetWork{private Server ser ;ProxyServer(Server ser){this.ser = ser;}public void check() {System.out.println("联网之前检查工作");}@Overridepublic void browse() {check();ser.browse();}}