Java案例——简单登录

public class UserLogin {
    public static void main(String[] args) {
        //1.定义两个字符串作为已知用户的姓名与密码
        String Username = "admin";
        String PassWord = "123456";
        //使用循环判断
        for (int i = 0; i <= 2; i++) {
            //2.使用Scanner类来获取用户输入的用户名与密码
            Scanner sc = new Scanner(System.in);
            System.out.print("请输入用户名:");
            String name = sc.nextLine();
            System.out.print("请输入密码:");
            String password = sc.nextLine();
            if (name.equals(Username) && password.equals(PassWord)) {
                System.out.println("登陆成功");
                return;
            } else {
                if (2 - i == 0) {
                    System.out.println("您的次数已用完");
                } else
                    System.out.println("用户名或密码错误,你还有" + (2 - i) + "次机会");

            }

        }

    }

}