（java总结）发红包案例实现

男娘i 2023-06-12 08:34 8阅读 0赞

package Demo14;
    
    public class User {
        
            private String name;
            private int money;
    
        public User() {
        
            }
    
        public User(String name, int money) {
        
            this.name = name;
            this.money = money;
        }
        public void show(){
        
            System.out.println("我叫：" + name + ", 我有多少钱：" + money) ;
        }
    
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public int getMoney() {
        
            return money;
        }
    
        public void setMoney(int money) {
        
            this.money = money;
        }
    }

package Demo14;
    
    import java.util.ArrayList;
    //群主的类
    public class Manager extends User {
        
        public Manager(){
        }
    
        public Manager(String name, int money) {
        
            super(name, money);
        }
        public ArrayList<Integer> send(int totalMoney,int count) {
        
    
            //首先需要一个集合，用来存储若干个红包的金额
            ArrayList<Integer> redList = new ArrayList<>();
    
            //首先看一下群主自己有多少钱
            int leftMoney = super.getMoney();//群主当前余额
            if(totalMoney > leftMoney){
        
                System.out.println("余额不足");
                return redList;//返回空集合
    
            }
    
            //扣钱，其实就是重新设置余额
            super.setMoney(leftMoney - totalMoney);
    
            //发红包需要平均分成分成count份
            int avg = totalMoney/count;
            int mod = totalMoney%count;//余数，在不能平均分的情况下
    
            //把红包放在集合中，零头放在最后一个红包中
            for (int i = 0; i < count-1; i++) {
        
                redList.add(avg);
    
            }
    
            //最后一个红包
            int last = avg + mod;
            redList.add(last);
    
            return redList;
    
    
    
    
        }
    
    
    }

package Demo14;
    
    import java.util.ArrayList;
    import java.util.Random;
    
    public class Member extends User {
        
        public Member() {
        
        }
    
        public Member(String name, int money) {
        
            super(name, money);
        }
    
        public void receive(ArrayList<Integer> list){
        
            //从多个红包中随便抽一个，给自己
            //随机获取一个集合当中的索引编号
            int index = new Random().nextInt(list.size());
    
            //根据索引，从集合当中删除，并且得到被删除的红包，给自己
            Integer delta = list.remove(index);
            //当前成员自己本来有多少钱
            int money = super.getMoney();
            //加法，重新加回去
            super.setMoney(money + delta);
    
        }
    }

package Demo14;
    
    import java.util.ArrayList;
    
    public class MainRedPacket {
        
        public static void main(String[] args) {
        
            Manager manager = new Manager("群主",100);
            Member one = new Member("成员A",0);
            Member two = new Member("成员B",0);
            Member three = new Member("成员C",0);
    
            manager.show();//100
            one.show();//0
            two.show();//0
            three.show();//0
    
            ArrayList<Integer>  redList = manager.send(20,3);
                one.receive(redList);
                two.receive(redList);
                three.receive(redList);
    
                manager.show();//100-20=80
                // 随机分给三个人
                one.show();
                two.show();
                three.show();
    
    
        }
    }