police.java

java模式设计

public class Police implements Observer{
	String name="";
	public Police(String name){
		this.name=name;
		System.out.println (name+"开始工作抓小偷...");
	}
	public void update(Subject s){
		System.out.println (name+"抓住了"+s.getState()+"小偷");
	}
}