微信红包平均分法

package hongbao;

import java.util.ArrayList;

public abstract class user {
    private String name;
    private double totalMoney;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getTotalMoney() {
        return totalMoney;
    }

    public void setTotalMoney(double totalMoney) {
        this.totalMoney = totalMoney;
    }



    public user(String name, double totalMoney) {
        this.name = name;
        this.totalMoney = totalMoney;
    }
    public abstract void fahongbao(ArrayList<Double> list);
    public abstract void shouhongbao(ArrayList<Double> list);//user.java
}

package hongbao;
import java.util.ArrayList;
public class qunyuan extends user {
    private int num;
    public qunyuan(String name, double totalMoney,int num) {
        super(name, totalMoney);
        this.num=num;

    }



    @Override
    public void fahongbao(ArrayList<Double> list) {

    }

    @Override

public void shouhongbao(ArrayList<Double> list) {
    Random r = new Random();

    int num = 0;
    try {
        num = r.nextInt(list.size());
        System.out.println("已收款" + list.remove(num));
        setTotalMoney(super.getTotalMoney() + list.remove(num));
        System.out.println("余额： " + getTotalMoney());

    }catch (IllegalArgumentException e){
        System.out.println("无法生成红包");
    }

}

 }//qunyuan.java

package hongbao;
import java.util.ArrayList;

public class demo_hongbao {
    public static void main(String[] args){
        qunzhu qz=new qunzhu("alex",3000);
        qunyuan qy1=new qunyuan("Linda",200,1);
        ArrayList<Double> list=new ArrayList<>();
        qz.fahongbao(list);
        qy1.shouhongbao(list);

    }
}//hongbao_demo

package hongbao;

import java.util.ArrayList;
import java.util.Scanner;

public class qunzhu extends user {
    public qunzhu(String name, double totalMoney) {
        super(name, totalMoney);

    }

public void fahongbao(ArrayList<Double> list) {
    Scanner sc = new Scanner(System.in);
    System.out.println("请输入金额");
    int i = sc.nextInt();
    if (i <= super.getTotalMoney()&&i>=0) {


        setTotalMoney((double) getTotalMoney() - i);
        System.out.println("请输入红包数量");
        int j = sc.nextInt();
        double money = (double) i / j;
        for (double x = 0; x < j; x++) {
            list.add(money);
        }
        System.out.println("群主余额为： " + getTotalMoney());


    }else {
        System.out.println("余额不足");
    }
}

    @Override
    public void shouhongbao(ArrayList<Double> list) {

    }//qunzhu.java

}