如何使用按键正确结束while循环? [英] How to properly end a while loop using a key press?

问题描述

我正在尝试创建一个while循环，该循环将一直运行到按键. 我正在使用此代码:

i am trying to create a while loop that will run until keypress. I am using this code:

while (System.in.available() == 0){
            // do something
    }

不幸的是，这不起作用. 有什么办法解决吗?这可能是什么原因? 我应该提到，在循环过程中，我正在将内容打印到控制台，这可能是原因吗?

unfortunately, this is not working. is there any way around it? what could be the reason for this? i should mention that during the loop i am printing things to the console, could this be the reason?

任何帮助将不胜感激，谢谢您的帮助.

any help would be appreciated, thank you for your help.

推荐答案

好，对于控制台应用程序，您是否尝试过System.in.read()?这是一个示例的链接: http://www.java2s.com/代码/JavaAPI/java.lang/Systeminread.htm

Ok, for console applications, have you tried System.in.read()? Here's a link to an example: http://www.java2s.com/Code/JavaAPI/java.lang/Systeminread.htm

我将在下面保留我的答案，以供后代以及正在寻找与具有UI的应用程序类似的答案的其他人. 您将要使用KeyListener捕获按键事件.这是一个如何实现它的例子. http://docs.oracle.com/javase/tutorial/uiswing/events /keylistener.html

I'll leave my answer below for posterity and other people who are looking for a similar answer to applications with a UI. You'll want to use a KeyListener to capture the key pressed event. Here's an example of how to implement it. http://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html

然后，您可以循环播放并查看在发生按键时设置的标志.您可能希望在循环过程中睡一小段时间(250或500ms)，否则您将创建一个循环，以非常快的速度吸收所有计算周期.

Then, you can loop and look at a flag that you set when a keypress occurs. You may want to sleep for short bits (250 or 500ms) during the loop or you'll be creating a loop that will absorb all of the compute cycles very fast.

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