发红包——继承练习

需求：
群主发红包，三个人随机抽取。

1.公共父类：

package com.bai.ai;
public class User {

    private String name;
    private int money;

    public User(String name, Integer money) {
        this.name = name;
        this.money = money;
    }

    public User() {
    }

    public String getName() {
        return name;
    }
    public void show(){
        System.out.println("我叫："+name+
                "，我有的钱是："+money);
    }
    public void setName(String name) {
        this.name = name;
    }

    public Integer getMoney() {
        return money;
    }

    public void setMoney(Integer money) {
        this.money = money;
    }



}

2.群主

package com.bai.ai;

import java.util.ArrayList;

public class Manger extends User {
    public Manger(String name, Integer money) {
        super(name, money);
    }

    public Manger() {
    }

    public ArrayList<Integer> send(int totalMoney, int count){
        ArrayList<Integer>  list=new ArrayList<Integer>();

        //当前余额
        int leftMoney=super.getMoney();
        if(leftMoney<totalMoney){
            System.out.println("余额不足");
            return list;
        }

        //扣钱
        super.setMoney(leftMoney-totalMoney);
        //发红包（平均拆分）
        int avg = totalMoney / count;
        int mod=totalMoney%count;   //零头
        //剩下的零头放在最后一个红包中

        //红包进集合
        for (int i = 0; i < count-1; i++) {
            list.add(avg);
        }

        int last=avg+mod;
        list.add(last);

        return list;

    }
}

3群众：

package com.bai.ai;

import java.util.ArrayList;
import java.util.Random;

public class Menber extends User {
    public Menber(String name, Integer money) {
        super(name, money);
    }

    public Menber() {
    }
    public void receive(ArrayList<Integer> list){
        //抽取红包，随机获取
        int index=new Random().nextInt(list.size());
        //从集合中删除，并且得到被删除的红包给自己
        int delta = list.remove(index);

        //当前成员本来的钱数
        int money=super.getMoney();
        super.setMoney(money+delta);

    }
}

4.测试：

package com.bai.ai;


import java.util.ArrayList;

public class Demo {
    public static void main(String[] args) {
        Manger manger=new Manger("群主",100);
        Menber a=new Menber("A",0);
        Menber b=new Menber("B",0);
        Menber c=new Menber("C",0);


        manger.show();
        a.show();
        b.show();
        c.show();
        System.out.println("+++++++++++++++");


        ArrayList<Integer> list = manger.send(20, 3);

        a.receive(list);
        b.receive(list);
        c.receive(list);

        manger.show();
        a.show();
        b.show();
        c.show();

    }




}