在Java中输入无效后重新提示用户 [英] Re-prompt user after invalid input in Java

问题描述

我正在用Java编写此程序，我需要在输入无效后重新提示用户.我来到一个解决方案，只是发现如果用户在重新提示后输入另一个无效输入，则它将继续.有人可以告诉我更好的解决方案吗?无论如何，我都会告诉你:

I'm writing this program in java where I need to re-prompt the user after an invalid input. I came to a solution only to discover that if the user enters another invalid input after the re-prompt then it continues. Can someone please show me a better solution to this? I'll show you what I had anyway:

System.out.println("What is your age?\n");
    age = userInput.nextInt();

    if((age > 120) || (age < 1)) {//error message
        System.out.println("ERROR Please enter a valid age");
        System.out.println("");
        System.out.println("What is your age?\n");
        age = userInput.nextInt();
    }//end if

如果用户在再次被提示后输入了无效的输入，程序将继续运行，我该如何克服呢?

if the user entered an invalid input after they were prompted again, the program would just continue, how can I overcome this?

推荐答案

将if替换为while.

BAM，问题已解决.

BAM, problem solved.

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