Java—第一次运行do while循环后重复输出

我正在尝试为学校作业创建一个小型/简单的菜单驱动的银行应用程序。我正在运行do while循环，询问用户希望使用哪个命令。在获得用户输入并运行一次循环后，第二次显示命令列表时，它会打印两次

do {
        System.out.println("Here is a list of possible commands:");
        System.out.println("Create Customer:'c'");
        System.out.println("Exit Application:'x'");

        read = keyboard.nextLine();

        if (read.equalsIgnoreCase("c")) {
            System.out.println("You have chosen to create a new customer!");

            System.out.println("\nPlease enter the customers first name: ");
            firstName = keyboard.nextLine();

            System.out.println("\nPlease enter the customers last name:");
            lastName = keyboard.nextLine();

            System.out.println("\nPlease enter the customers address: ");
            address = keyboard.nextLine();

            System.out.println("\nPlease enter the customers email: ");
            email = keyboard.nextLine();

            System.out.println("\nPlease enter the customers phone number: ");
            phoneNum = keyboard.nextLine();

            System.out.println("\nPlease enter the customers age: ");
            age = keyboard.nextInt();

            System.out.println("\nPlease enter the customers initial deposit: ");
            deposit = keyboard.nextDouble();

            Customer tempCust = new Customer(firstName, lastName, address, email, age, phoneNum);
            tempCust.createAccount(deposit);
            customers.add(tempCust);

            System.out.println("\nThank you! A new customer has been created!\n");
        }
    } while (!read.equalsIgnoreCase("x"));

循环第一次运行时将显示：

以下是可能的命令列表： 创建客户：'c' 退出应用程序：'x'

但第二次运行时，它会显示：

以下是可能的命令列表： 创建客户：'c' 退出应用程序：'x' 以下是可能的命令列表： 创建客户：'c' 退出应用程序：'x'

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非常感谢你的帮助

添加read=keyboard.nextLine（）；在你的后面： System.out.println（“\n谢谢！已创建新客户！\n”）

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如果您指向的是不等于“x”或“c”的对象，则必须将指针移到空行，否则您的程序将不会等待您的输入。

非常感谢！已经修好了。我真的很感谢你的帮助。

read = keyboard.nextLine();
System.out.println("\nThank you! A new customer has been created!\n");