Java实现发红包功能

Java发红包案例，供大家参考，具体内容如下

首先我们需要分析这个代码的架构是什么，需要什么类组成等。
我们需要建立4个类，这4个类分别是用户类、群主类、成员类，运行类；
因为群主类和成员类都有共同的特点--------拥有名字和余额，所以需要用户类去存储名字与余额

第一步：我们需要建立一个用户类，里面存储的是名字和余额

package Java.RedPacketCode;

public class UserClass {
 private String name;
 private int balance;

public UserClass(String name, int balance) {
   this.name = name;
   this.balance = balance;
 }

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

public String getName() {
   return name;
 }

public void setBalance(int balance) {
   this.balance = balance;
 }

public int getBalance() {
   return balance;
 }

public void show() {
   System.out.println("Name:" + name + "****" + "RMB:" + balance);
 }
}

第二步：我们需要一个群主类去继承用户类

package Java.RedPacketCode;

import java.util.ArrayList;

public class GroupMainClass extends UserClass {

public GroupMainClass(String name, int balance) {
   super(name, balance);
 }

public ArrayList<Integer> handOutRedEnvelopes(int amountRequired, int count) {
   int existingAmount = super.getBalance();
   if (existingAmount < amountRequired) {
     System.out.println("Your balance is insufficient!");
   }
   int money=existingAmount-amountRequired;
   super.setBalance(money);

System.out.println(super.getName()+" has"+money+" yuan left");

int avg = amountRequired / count;
   int remainder = amountRequired ％ count;
   int decimal = avg + remainder;

ArrayList<Integer> list = new ArrayList<>();
   for (int i = 0; i < count - 1; i++) {
     list.add(avg);
   }
   list.add(decimal);
   return list;
 }
}

第三步：我们需要建立一个成员类去继承用户类

package Java.RedPacketCode;

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

public class MemberClass extends UserClass {

public MemberClass(String name, int balance) {
   super(name, balance);
 }

public void redEnvelopes(ArrayList<Integer> list) {
   Random r = new Random();
   int index = r.nextInt(list.size());
   int money = list.remove(index);
   int existingAmount = super.getBalance();
   int totalAmount = money + existingAmount;
   super.setBalance(totalAmount);
 }
}

第四步：我们需要建立一个运行类，用来运行代码

package Java.RedPacketCode;

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

public class Main {

public static void main(String[] args) {
   GroupMainClass gmc = new GroupMainClass("Groupleader", 200);
   gmc.show();
   MemberClass mc1 = new MemberClass("Tom", 0);
   MemberClass mc2 = new MemberClass("Jack", 0);
   MemberClass mc3 = new MemberClass("Jenny", 0);

UserClass arrays[] = {mc1, mc2, mc3};
   for (int i = 0; i < arrays.length; i++) {
     arrays[i].show();
   }

System.out.println("==================");
   Scanner scanner = new Scanner(System.in);
   System.out.println("How much would you like to send");
   int money = scanner.nextInt();
   System.out.println("How many red packets would you like to send");
   int count = scanner.nextInt();
   ArrayList<Integer> list = gmc.handOutRedEnvelopes(money, count);
   mc1.redEnvelopes(list);
   mc2.redEnvelopes(list);
   mc3.redEnvelopes(list);
   for (int i = 0; i < arrays.length; i++) {
     arrays[i].show();
   }

}
}

希望大佬们多多指教。

来源：https://blog.csdn.net/qq_43875441/article/details/106064695