5.5java上机

class instrument {
    public void play(){
        System.out.println("弹奏乐器");
    }
    class wind extends instrument{
        String a1;
        public void play(){
            System.out.println("弹奏wind");
        }
        public void play2(){
            System.out.println("调用wind的play2方法");
        }
        
    }
    class bross extends instrument{
        public void play(){
            System.out.println("弹奏bross");
        }
        public void play2(){
            System.out.println("调用bross的play2方法");
        }
    }
    class music{
        public void tune(instrument i){
            i.play();
        }
        public void main(String[] args){
            music a = new music();
            wind a1 = new wind();
            bross a2 = new bross();
            a.tune(a1);
            a.tune(a2);
        }
    }

public class monkey {
    public monkey(String s){
    }
    public void speak(){
        System.out.println("依依呀呀");
    }
    class person extends monkey{
        public person(String s) {
            super(s);
        }
        public void speak(){
            System.out.println("小样，不错呀！会说话！");
        }
        public void think(){
            System.out.println("别说话，认真思考");
        }
    }
    class e{
        public void main(String[] args){
            monkey a1 = new monkey("a1");
            person a2 = new person("a2");
            a1.speak();
            a2.speak();
            a2.think();
        }
    }

 

import java.util.*;
public class rectanggle {
    int d,r;
    public void scount(){
        System.out.println("请输入长，宽的数据：");
        Scanner a = new Scanner(System.in);
        d = a.nextInt();
        r = a.nextInt();
        System.out.println("长为："+d+"宽为："+r);
        System.out.println("面积为："+d*r);
    }    
    
    class rect extends rectanggle{
        int h;
        public void scount() {
            int v = d*r*h;
            System.out.println("请输入长，宽，高的数据：");
            Scanner a = new Scanner(System.in);
            d = a.nextInt();
            r = a.nextInt();
            h = a.nextInt();
            System.out.println("长为："+d+"宽为："+r+"高为："+h);
            System.out.println("体积为："+v);
        }
    }
    
        public void main(String[] args) {
            rectanggle a1 = new rectanggle();
            rect a2 = new rect();
            a1.scount();
            a2.scount();
    }
}