thief.java

java模式设计

import java.util.LinkedList;
public class Thief implements Subject{
	public Thief(){
		System.out.println ("开始准备偷...");
	}
	LinkedList v=new LinkedList();
	String state="";
	public void attach(Observer o){
		v.add(o);
	}
	public void detach(Observer o){
		v.remove(o);
	}
	public void sendNotify(){
		state="偷了5000千元的";
		for (int i = 0; i<v.size(); i++) {
			((Observer)v.get(i)).update(this);
	    }	
	}	
	public String getState(){
		return state;
	}
}