Java实现大富翁抽奖系统

由于闲着没事干，就自己写了一个小玩意，算得上是一个Scanner对象的基础练习，然后大家直接看代码吧，感兴趣的可以自己试着写一写。

package com.ywt.mybatisplus.game;

import com.baomidou.mybatisplus.core.toolkit.StringUtils;

import java.util.Scanner;


public class BigMoney {
    public static void main(String[] args) {
        System.out.println("******  欢迎来到大富翁系统 ******");
        String username = "";   //账号
        String password = "";   //密码
        boolean flag = true;    //开关
        int status = 0;         //登录状态
        while (flag) {
            System.out.println("------  请选择办理的业务   ------");
            System.out.println("1：<用户注册>" + "   " + "2：<用户登录>" + "   " + "3：<用户抽奖>");
            System.out.print("请输入：");
            Scanner scanner = new Scanner(System.in);
            int nums = scanner.nextInt();
            switch (nums) {
                case 1:
                    System.out.println();
                    System.out.println("欢迎来到大富翁<用户注册>系统：");
                    System.out.print("请输入账号：");
                    String registerUsername = scanner.next();
                    username = registerUsername;
                    System.out.print("请输入密码：");
                    String registerPassword = scanner.next();
                    password = registerPassword;
                    System.out.println();
                    System.out.println("注册成功，您的账号是：" + username);
                    System.out.println("注册成功，您的密码是：" + password);
                    System.out.print("是否退出系统？《y：退出 其他：继续》：");
                    String isExit = scanner.next();
                    if (isExit.equals("y")){
                        System.out.println("退出成功");
                        flag = false;
                    }
                    System.out.println();
                    break;
                case 2:
                    if (StringUtils.isBlank(username) || StringUtils.isBlank(password)){
                        System.out.println("请先注册！");
                        System.out.println();
                        break;
                    }
                    System.out.println();
                    System.out.println("欢迎来到大富翁<用户登录>系统");
                    System.out.print("请输入登录账号：");
                    String loginUsername = scanner.next();
                    System.out.print("请输入登录密码：");
                    String loginPassword = scanner.next();
                    if (loginUsername.equals(username) && loginPassword.equals(password)) {
                        status = 1;
                        System.out.println("登录成功！");
                    } else {
                        System.out.println("账号或密码错误，登录失败！");
                    }
                    System.out.print("是否退出系统？《y：退出 其他：继续》：");
                    String loginIsExit = scanner.next();
                    if (loginIsExit.equals("y")){
                        System.out.println("退出成功");
                        flag = false;
                    }
                    System.out.println();
                    break;
                case 3:
                    System.out.println();
                    if (status != 1){
                        System.out.println("请先登录！");
                        System.out.println();
                        break;
                    }
                    System.out.println("欢迎来到大富翁<用户抽奖>系统");
                    System.out.print("请选择您的抽奖号码（4位数）");
                    int lotteryNums = scanner.nextInt();
                    System.out.print("今日的幸运号码是：");
                    for (int i = 0; i < 5; i++){
                        int randomNums = (int)(Math.random() * 9000 + 1000);
                        System.out.print(randomNums + "  ");
                        if (lotteryNums == randomNums){
                            System.out.println("恭喜您中奖了！");
                            break;
                        }
                    }
                    System.out.println();
                    System.out.println("很遗憾您没有中奖~");
                    System.out.println();
                    System.out.println("抽奖系统完成，自动退出系统");
                    flag = false;
                    break;
                default:
                    System.out.println();
                    System.out.println("请选择1~3之间的业务");
                    break;
            }
        }

    }
}