用java编写一个抽奖程序 用java编写幸运抽奖

`import java.util.Arrays;

import java.util.Scanner;/**
• @Author：TJ
• @Version：1.0
• @Date：2022/4/30-17:15
• @Since:jdk1.8
• @Description:

*/

public class Work {

static String inputname, inputPswd;

static String loginname, loginPswd;

static Scanner scanner = new Scanner(System.in);

static int luckNum, num1;

static boolean flag;
public static void reg() {

System.out.println("请输入注册的账号");

inputname = scanner.next();

System.out.println("请输入注册的账号密码");

inputPswd = scanner.next();

System.out.println("注册成功！请记住你的密码");

luckNum = (int) (Math.random() * 8999 + 1000);

System.out.println("用户名" + "\t" + "密码" + "\t" + "会员卡号");

System.out.println(inputname + "\t" + "\t" + " " + inputPswd + "\t" + "\t" + luckNum);
}
public static void login() {

//先判断是否注册

if (inputname == null) {

System.out.println("你还未注册！");

return;

}

boolean flag = true;

int count = 3;

while (flag) {

System.out.println("请输入你的账号和密码");

loginname = scanner.next();

loginPswd = scanner.next();

if (inputname.equals(loginname) && inputPswd.equals(loginPswd)) {

System.out.println("登陆成功！");

break;

} else {

System.out.println("登陆失败!你还有" + (count - 1) + "次机会");

count--;

if (count == 0) {

System.out.println("次数用尽");

return;

}}

 }}
public static void again() {

String answer = "y";

System.out.println("请选择是否继续？请按 y , 按n退出本系统");

char a = scanner.next().charAt(0);//        switch (answer){

//            case "y":

//                break;

//            case "n":

//                System.out.println("谢谢使用！");

//                return;

//        }

if (a == 'y'||a=='Y') {

flag=true;

}else {

System.out.println("谢谢使用！");

return;

}

}

public static void menu() {
    System.out.println("***********欢迎进入奖客大富翁系统*************");
    flag = true;
    while (flag) {
        System.out.println("  ************************************");
        System.out.println("\t\t\t" + "1.注册账号");
        System.out.println("\t\t\t" + "2.登录账号");
        System.out.println("\t\t\t" + "3.超级抽奖");
        System.out.println("  ************************************");
        int choose = scanner.nextInt();
        switch (choose) {
            case 1:
                reg();
                flag = false;
                break;
            case 2:
                login();
                flag = false;
                break;
            case 3:
                luck();
                flag = false;
                break;
            default:
                System.out.println("选择有误，请重新选择");
                break;
        }
        again();
    }


}

public static void luck() {
    if (loginname == null) {
        System.out.println("你还未登录！");
        return;
    }
    //随机生成四个四位数作为当日幸运数字
    int[] luckDayNum = new int[5];
    for (int i = 0; i < luckDayNum.length; i++) {
        luckDayNum[i] = (int) ((Math.random() * 8999 + 1000));
    }

// boolean flag = true;
// while (flag) {
//判断用户输入的卡号和注册给的卡号是否一致
System.out.println("请输入您的卡号！");
num1 = scanner.nextInt();
if (num1 != luckNum) {
System.out.println("此数不是您的卡号！");
return;
// flag = true;
}
// break;
// }

// }
//判断用户是否是今日幸运客户
for (int i = 0; i < luckDayNum.length - 1; i++) {
if (luckDayNum[i] == num1) {
System.out.println("恭喜你！你中了十亿！");
break;
}
}
System.out.println("很抱歉，您不是我们的今日幸运会员！");
System.out.println("今日幸运数字是：" + Arrays.toString(luckDayNum));
}

public static void main(String[] args) {
    menu();
}

}`