System.exit(0) 与 JFrame.EXIT_ON_CLOSE [英] System.exit(0) vs JFrame.EXIT_ON_CLOSE

问题描述

这两者有什么区别.我正在阅读一篇文章(http://www.javalobby.org/java/forums/t17933 ) 关于您应该始终使用的内容

Is there any difference between the two. I was reading an article ( http://www.javalobby.org/java/forums/t17933 ) about that you should always use

System.exit(0);

目前我使用

JFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

文章说，即使对于 Java Swing 应用程序，您也应该添加一个侦听器 WindowAdapter 并在其方法 windowClosing(WindowEvent) 中调用 System.exit()e).

The article says that even for a Java Swing Application you should add a listener WindowAdapter and and call System.exit() inside its method windowClosing(WindowEvent e).

有什么不同吗?一种方法比另一种更好吗?

Is there any difference? Is one method better then the other?

推荐答案

如果你看一下 JFrame 代码，就会发现:

If you look at the JFrame code, it does:

 protected void processWindowEvent(WindowEvent e) {
        super.processWindowEvent(e);

        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
            switch(defaultCloseOperation) {
              ...
          case EXIT_ON_CLOSE:
                  // This needs to match the checkExit call in
                  // setDefaultCloseOperation
        System.exit(0);
        break;
            }
        }
    }

所以，这完全一样.如果您希望这样做，我会设置 EXIT_ON_CLOSE.

So, it's exactly the same thing. I would just set EXIT_ON_CLOSE if that's what you want it to do.

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