装饰设计模式

public interface Phone {
    public void call();
}

public abstract class BasicFunction implements Phone {
    private Phone p;

    public BasicFunction(Phone p) {
        this.p = p;
    }

    @Override
    public void call() {
        p.call();
    }
}

public class MusicFunction extends BasicFunction {
    public MusicFunction(Phone p) {
        super(p);
    }

    @Override
    public void call() {
        // TODO Auto-generated method stub
        super.call();
        System.out.println("手机可以听歌了!!!!!!!!!");
    }
}

public class Test {

    public static void main(String[] args) {
        Iphone p = new Iphone();
        MusicFunction p2 = new MusicFunction(p);
        p2.call();
//        RingFunction p3 = new RingFunction(p);
//        p3.call();
    }
}