接口代理模式

（一）
接口

package test;

public interface Fruit {
public void fruit();
}

实现接口的两个实现类

package test;

public class Apple implements Fruit {

@Override
public void fruit() {
// TODO Auto-generated method stub
        System.out.println("苹果");
    }

}

package test;

public class Banana implements Fruit {

@Override
public void fruit() {
// TODO Auto-generated method stub
        System.out.println("香蕉");
    }

}

测试类

package test;

public class Main {
    Fruit fruit = null;

public Main(Fruit fruit) {
this.fruit = fruit;
    }
public void fruit() {
       fruit.fruit();
    }
public static void main(String[] args) {
    Fruit fruit = new Banana();
    Main m = new Main(fruit);
    m.fruit();
   }
}

（二）
接口

package test;

public interface View {
public void  clikButton();
}

实现接口的一个实现类

package test;

public class Action implements View{
    Button button = null;
public void onStart(){
        button = new Button();
        button.clickButton(this);
    }
public static void main(String[] args) {
        Action a = new Action();
        a.onStart();
    }
// class viewTest implements View{
// @Override
// public void clikButton() {
// System.out.println("Action"); 
// } 
// }
@Override
public void clikButton() {
// TODO Auto-generated method stub
        System.out.println("Action");   
    }
}

package test;

public class Button {
public void clickButton(View view){
       System.out.println("Button");
       view.clikButton();
   }
}