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package rg;
import  java.util.Scanner;
 interface Soundable {
    public abstract void playSound();

    public abstract void lower();

    public abstract void stop();
}
class Phone implements Soundable{

    @Override
    public void playSound() {
        System.out.println("手机出声了，快接");

    }

    @Override
    public void lower() {
        System.out.println("手机调音量了");
    }

    @Override
    public void stop() {
        System.out.println("手机关机了");
    }
}
class Radio implements Soundable{

    @Override
    public void playSound() {
        System.out.println("收音机出声了，");

    }

    @Override
    public void lower() {
        System.out.println("收音机调音量了");
    }

    @Override
    public void stop() {
        System.out.println("收音机关机了");
    }
}
class Walkman implements Soundable{

    @Override
    public void playSound() {
        System.out.println("随身听出声了");

    }

    @Override
    public void lower() {
        System.out.println("随身听调音量了");
    }

    @Override
    public void stop() {
        System.out.println("随身听关机了");
    }
}
 class Usersound {
    public void use(Soundable s) {
        s.playSound();
        System.out.println("是否降低音量?  1、是 2、否");
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        if (a == 1) {
            s.lower();
            System.out.println("是否要关机？1、是 2、否");
            int b = sc.nextInt();
            if (b == 1) {
                s.stop();
            }
        }

    }
}

public class secondwork {
     public static void main(String[] args){
         Scanner sc=new Scanner(System.in);
         System.out.println("请选择你要进行的设备：1、手机。2、收音机。3、随身听");
         int x=sc.nextInt();
         Usersound u=new Usersound();
         if (x==2){
             u.use(new Radio());

         }else  if (x==3){
             u.use(new Walkman());
         }else if (x==1){
             u.use(new Phone());
         }else{
             System.out.println("输入的有误");
         }


     }
}