递归导致 exit 退出所有 JFrame（终止应用程序）

发布于 2024-08-24 02:50:21 字数 644 浏览 10 评论 0原文

我制作了一个应用程序，让用户可以选择完全打开应用程序的新生成。当用户这样做并关闭应用程序时，整个应用程序将终止；不仅仅是窗户。

我应该如何递归地生成应用程序，然后当用户退出 JFrame 生成时；只杀死那个 JFrame 而不是整个实例？

这是相关代码：

[...]
JMenuItem newMenuItem = new JMenuItem ("New");
newMenuItem.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
{        
    new MainWindow();
    }
});
fileMenu.add(newMenuItem);

[....]

JMenuItem exit = new JMenuItem("Exit");
exit.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
    {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
});
fileMenu.add(exit);
[...]

原文

I have made an application that gives the user the option to open up a new spawn of the application entirely. When the user does so and closes the application the entire application terminates; not just the window.

How should I go about recursively spawning an application and then when the user exits the JFrame spawn; killing just that JFrame and not the entire instance?

Here is the relevant code:

[...]
JMenuItem newMenuItem = new JMenuItem ("New");
newMenuItem.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
{        
    new MainWindow();
    }
});
fileMenu.add(newMenuItem);

[....]

JMenuItem exit = new JMenuItem("Exit");
exit.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
    {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
});
fileMenu.add(exit);
[...]

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温柔一刀 2024-08-31 02:50:21

首先，您应该尝试 JFrame.DISPOSE_ON_CLOSE 而不是 JFrame.EXIT_ON_CLOSE，因为无论是否有活动线程在运行，EXIT_ON_CLOSE 都会关闭应用程序。
如果您仍然遇到问题，您应该考虑引入实例计数器。更聪明地做出反应
另请参阅此讨论

回复收藏 0 原文

梦明 2024-08-31 02:50:21

我完全删除了 frame.setDefaultCloserOperation(JFrame.EXIT_ON_CLOSE); 代码。

我将其更改为DISPOSE_ON_CLOSE，但问题仍然发生。我最终创建了一个 windowEvent 并添加： frame.dispose(); 并且行为正是我想要的。

这是代码：

                frame.addWindowListener(new WindowListener() {
                public void windowClosing(WindowEvent e) {
                    //Allows for multiple instances and properly closing
                    //only one of the Frames instead of all of them
                    frame.dispose();
                }
                public void windowOpened(WindowEvent e) {}              
                public void windowClosed(WindowEvent e) {}
                public void windowIconified(WindowEvent e) {}
                public void windowDeiconified(WindowEvent e) {}
                public void windowActivated(WindowEvent e) {}
                public void windowDeactivated(WindowEvent e) {}
            });

I completely removed the frame.setDefaultCloserOperation(JFrame.EXIT_ON_CLOSE); code.

I changed it to DISPOSE_ON_CLOSE and still the problem was still happening. I ended up creating a windowEvent and adding: frame.dispose(); and the behavior is what I wanted.

Here is the code:

                frame.addWindowListener(new WindowListener() {
                public void windowClosing(WindowEvent e) {
                    //Allows for multiple instances and properly closing
                    //only one of the Frames instead of all of them
                    frame.dispose();
                }
                public void windowOpened(WindowEvent e) {}              
                public void windowClosed(WindowEvent e) {}
                public void windowIconified(WindowEvent e) {}
                public void windowDeiconified(WindowEvent e) {}
                public void windowActivated(WindowEvent e) {}
                public void windowDeactivated(WindowEvent e) {}
            });

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