package com.decorate;

public class Iphone implements Phone{

    @Override

    public void call() {

        System.out.println("手机可以打电话");

    }

}

package com.decorate;

public interface Phone{

    public void call();//打电话

}

package com.decorate;

public abstract class PhoneDecorate implements Phone{

    private Phone p;

    public PhoneDecorate(Phone p){

        this.p=p;

    }

    @Override

    public void call() {

        this.p.call();

    }

}

package com.decorate;

public class MusicPhoneDecorate extends PhoneDecorate {

    public MusicPhoneDecorate(Phone p) {

        super(p);

    }

    @Override

    public void call() {

        super.call();

        System.out.println("手机可以听音乐");

    }

}

package com.decorate;

public class RingPhoneDecorate extends PhoneDecorate {

    public RingPhoneDecorate(Phone p) {

        super(p);

    }

    @Override

    public void call() {

        System.out.println("手机可以听彩铃");

        super.call();

    }

}

package com.decorate;

public class PhoneDemo {

    public static void main(String[] args) {

        Iphone iphone=new Iphone();

        iphone.call();

        System.out.println("---");

        //接电话前听彩铃

        PhoneDecorate pd=new RingPhoneDecorate(iphone);

        pd.call();

        System.out.println();

        //接电话后听音乐

        pd=new MusicPhoneDecorate(iphone);

        pd.call();

        System.out.println("-----");

        //手机在接听前听彩铃，接听后听音乐

        pd=new MusicPhoneDecorate(new RingPhoneDecorate(iphone));

        pd.call();

    }

}