equals方法if語句驗證用戶密碼

 

import java.util.Scanner;




public class CheckLogin {
    public static void main(String[]args)
    {
        Scanner scanner = new Scanner(System.in);
        System.out.println("請輸入登陸的用戶名：");
        String usernameString = scanner.nextLine();
        System.out.println("請輸入登陸的密碼：");
        String passwordString = scanner.nextLine();
        if (!usernameString.equals("nihao")) {
            System.out.println("用戶名錯誤");

        }
        else if (!passwordString.equals("123")) {
            System.out.println("密碼錯誤");

        }
        else {
            System.out.println("通過驗證");
        }
        }


}