1 package Demo511; 2
3 import java.util.ArrayList; 4
5 public class DemoSend { 6 public static void main(String[] args) { 7 Manager manager =new Manager("群主",1000); 8 Member one = new Member("成员A",0); 9 Member two = new Member("成员B",0); 10 Member three = new Member("成员C",0); 11 Member four = new Member("成员D",0); 12 Member five = new Member("成员E",0); 13
14 ArrayList<Integer> redlist =manager.send(666,5); 15
16 one.receive(redlist); 17 two.receive(redlist); 18 three.receive(redlist); 19 four.receive(redlist); 20 five.receive(redlist); 21
22 manager.show(); 23 one.show(); 24 two.show(); 25 three.show(); 26 four.show(); 27 five.show(); 28 } 29 }
👇是成员类，群主继承成员，群员继承成员
1 package Demo511; 2
3 public class User { 4 private String name ; 5 private int money; 6
7 public User(){ 8
9 } 10
11 public User(String name,int money) { 12 this.money=money; 13 this.name = name; 14 } 15 //展示一下，当前用户的钱
16 public void show(){ 17 System.out.println("我叫："+name+",还有"+money+"块钱"); 18 } 19 public String getName(){ 20 return name; 21 } 22 public void setName(String name){ 23 this.name=name; 24 } 25 public int getMoney(){ 26 return money; 27 } 28 public void setMoney(int money){ 29 this.money=money; 30 } 31 }
1 package Demo511; 2
3 import java.util.ArrayList; 4 /*
5 默认构造，有参构造 6 */
7 public class Manager extends User{ 8 public Manager(){ 9 } 10 public Manager(String name, int money) { 11 super(name, money); 12 } 13 public ArrayList<Integer> send(int totalMoney,int count) { 14 //用一个集合，来存储若干个红包的金额
15 ArrayList<Integer> redList = new ArrayList<>(); 16 //查看群主的金钱余额
17 int leftMoney =super.getMoney();//群主当前余额
18 if (totalMoney>leftMoney){ 19 System.out.println("余额不足"); 20 return redList; //返回空集合
21 } 22 //扣钱就是重新设置余额
23 super.setMoney(leftMoney-totalMoney); 24 //发红包需要评分count份
25 int avg =totalMoney/count; 26 int mod =totalMoney%count; 27 //除不开的金钱，放到最后一个红包里面
28 for (int i = 0; i < count-1; i++) { 29 redList.add(avg); 30 } 31 redList.add(avg+mod); 32 return redList; 33 } 34 }
1 package Demo511; 2
3 import java.util.ArrayList; 4 import java.util.Random; 5
6 public class Member extends User { 7 public Member() { 8 } 9 public Member(String name, int money) { 10 super(name, money); 11 } 12 public void receive(ArrayList<Integer>list){ 13 //从多个红包当中抽取一个给我。 14 //随机获取一个集合的索引编号。
15 int index =new Random().nextInt(list.size()); 16 //删除一个随机红包，并且给我。
17 int detal = list.remove(index); 18 int money = super.getMoney(); 19 super.setMoney(money+detal); 20 } 21 }
代码运行👇
