public class InterfaceDemo {
    public static void main(String[] args) {
        MInterface[] ary=new MInterface[5];
        ary[0]=new A();
        ary[1]=new B();
        ary[2]=new C();
        ary[3]=new B();
        ary[4]=new A();//接口的具体实现类
        for(MInterface m:ary){
            m.move();//java的自动向下绑定会自动实现具体实现类的move()方法
        }
    }
}

class A implements MInterface{

    @Override
    public void move() {
        //To change body of implemented methods use File | Settings | File Templates.
        System.out.println("这一行代表A对接口方法的业务逻辑实现");
    }
}
class B implements MInterface{

    @Override
    public void move() {
        //To change body of implemented methods use File | Settings | File Templates.
        System.out.println("这一行代表B对接口方法的业务逻辑实现");
    }
}

class C implements MInterface{

    @Override
    public void move() {
        //To change body of implemented methods use File | Settings | File Templates.
        System.out.println("这一行代表C对接口方法的业务逻辑实现");
    }
}



interface MInterface{
    public void move();
}