Java没有数据库的简单注册登录

package com.foreknow.test;

import java.util.Scanner;

public class LoopDemo2 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String proceed = "Y";

        boolean online = false;

        String name = "";
        String password = "";

        int safeIn = 3;

        while (proceed.equals("Y")) {
            System.out.println("----------------------");
            System.out.println("-------1.注册---------");
            System.out.println("-------2.登录---------");
            System.out.println("-------3.抽奖---------");
            System.out.println("---------------------");
            System.out.print("请选择菜单：");
            int choice = input.nextInt();

            if (choice == 1) {
                if (online == false) {
                    System.out.println("注册");
                    System.out.println("请输入用户名：");
                    name = input.next();
                    System.out.println("请输入密码");
                    password = input.next();
                    System.out.println("注册成功，请记好您的个人信息");
                    System.out.println("用户名\t密码\t会员卡号");
                    System.out.println(name + "\t" + password + "\t" + (int) ((Math.random() * 9 + 1) * 1000));
                    online = true;
                } else if (online == true) {
                    System.out.println("注册过，请登录");
                }
            } else if (choice == 2) {
                if (online == true) {
                    System.out.println("登录");
                    String nameTest = "";
                    String passWordTest = "";
                    System.out.println("请输入用户名：");
                    nameTest = input.next();
                    System.out.println("请输入密码：");
                    passWordTest = input.next();
                    while (safeIn > 0) {
                        if (nameTest.equals(name) && passWordTest.equals(password)) {
                            System.out.println("欢迎！");
                            safeIn = 3;
                            break;
                        } else {
                            safeIn--;
                            System.out.println("您还有" + safeIn + "次机会");
                            break;
                        }
                    }
                } else if (online == false) {
                    System.out.println("未注册，请先注册");
                }
            } else if (choice == 3) {
                System.out.println("抽奖");
            }
            System.out.print("是否继续(Y/N)：");
            proceed = input.next();
        }
        System.out.println("系统退出");
    }
}