/*接口的定义和使用之：代理设计模式
 *简单实现
 */
interface Subject{//整个主题核心功能
    public void made();
}
class RealSubject implements Subject{//真实主题类
    public void made(){
       System.out.println("***真实主题正在进行***");
    }
}
class ProxySubject implements Subject{//代理主题类
    private Subject subject;
    //接收一个真实主题的实例化对象
    public ProxySubject(Subject subject){
       this.subject = subject;
    }
    public void prepare(){
       System.out.println("***代理主题正在准备***");
    }
    public void made(){
       this.prepare();
       this.subject.made();//调用真实主题的made()方法
       this.destory();
    }
    public void destory(){
       System.out.println("***代理主题正在收尾***");
    }
}
public class TestDemo{
    public static void main(String[] args){
       Subject sub = new ProxySubject(new RealSubject());
       sub.made();
    }
}