代理模式

Proxy.java

import static com.mceiba.util.Print.*;

interface Interface{
	void doSomething();
	void somethingElse(String arg);
}
class RealObject implements Interface{
	public void doSomething() { println("doSomething"); }
	public void somethingElse(String arg) { println("somethingElse "+arg); }
}
class SimpleProxy implements Interface{
	private Interface proxied;
	public SimpleProxy(Interface proxied) { this.proxied = proxied; }
	public void doSomething(){
		println("SimpleProxy doSomething");
		proxied.doSomething();
	}
	public void somethingElse(String arg) {
		println("SimpleProxy somethingElse "+arg);
		proxied.somethingElse(arg);
	}
}
public class Proxy{
	public static void consumer(Interface iface){
		iface.doSomething();
		iface.somethingElse("bonn");
	}
	public static void main(String[] args){
		consumer(new RealObject());
		consumer(new SimpleProxy(new RealObject()));
	}
}