java 模拟微信拼手气红包程序产生指定个数的随机红包 ● 输入红包总金额 ● 输入红包个数 ● 输出所有红包

以下是 Java 实现微信拼手气红包程序，可以产生指定个数的随机红包：

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Scanner;

public class RedPacket {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入红包总金额：");
        double totalAmount = scanner.nextDouble();
        System.out.print("请输入红包个数：");
        int num = scanner.nextInt();
        List<Double> redPacketList = generateRedPacket(totalAmount, num);
        System.out.println("所有红包：");
        for (Double redPacket : redPacketList) {
            System.out.println(redPacket);
        }
    }

    /**
     * 生成随机红包
     *
     * @param totalAmount 红包总金额
     * @param num         红包个数
     * @return 红包列表
     */
    private static List<Double> generateRedPacket(double totalAmount, int num) {
        List<Double> redPacketList = new ArrayList<>();
        Random random = new Random();
        double remainingAmount = totalAmount;
        for (int i = 0; i < num; i++) {
            if (i == num - 1) {
                redPacketList.add(remainingAmount);
            } else {
                double maxAmount = remainingAmount / (num - i);
                double amount = random.nextDouble() * maxAmount * 2;
                redPacketList.add(amount);
                remainingAmount -= amount;
            }
        }
        return redPacketList;
    }
}

运行程序后，输入红包总金额和红包个数，就能输出所有随机生成的红包金额。