java - 简单的登录程序，不知道如何返回主菜单。

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关闭。这个问题需要多问 focused 。目前不接受答案。

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已关闭 7 年前。

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我正在寻找一种在创建用户后能够返回菜单的方法。任何帮助，将不胜感激。我对编程非常陌生，所以如果您需要更多信息，请告诉我。

    public static void main(String[] args) {
        System.out.println("MAIN MENU");
        System.out.println(" ");
        System.out.println("1) Creating a Login");
        System.out.println("2) Login");
        System.out.println("9) Quit");
        System.out.println(" ");
        System.out.println("Please enter your choice: ");
        System.out.println(" ");

        Scanner sc = new Scanner(System.in);
        int menuOption = sc.nextInt();
        while (menuOption != 9) {
            if (menuOption == 1) {

                System.out.println("Creating Username, please enter a string:");
                String user = sc.nextLine();
                user = sc.nextLine();
                System.out.println("Creating Password, please enter a string:");
                String pass = sc.nextLine();
                System.out.println("user is" + user);
                System.out.println("pass is" + pass);

                if (menuOption == 2) {
                    System.out.println("Please enter your Username");
                    String inpUser = sc.nextLine();
                    System.out.println("Now please enter your Password");
                    String inpPass = sc.nextLine();

                    if (inpUser.equals(user) && inpPass.equals(pass)) {
                        System.out.print("Credentials Accepted");
                    } else {
                        System.out.print("Credentials Declined Please try again.");
                    }
                }


                if (menuOption == 9) {
                    break;
                }
            }
        }
    }
}

Answer 1

如果您需要重复某些代码块，请将其放入循环内。