Closing program when GUI is closed

[Mikpo Siru]

Hi,

I have one JFrame running in my program, and some non-gui threads. I want to perform a shutdown routine on the threads when the JFrame is closed. To do this, I have set JFrame.DISPOSE_ON_CLOSE. In another thread, I call join() on the AWT thread, so that when the AWT thread finishes (JFrame dispose()) I can excute the shutdown routines:

class GuiFrame extends JFrame{
    public GuiFrame(){
        JFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    ...
}

class Main{
    public Main(){
        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                GuiFrame gui = new GuiFrame();
                awtThreadHandle = Thread.currentThread();
            }
        });
    }

    ...

    public void closeWithGui(){
        /*
        * Wait until JFrame is closed (JFrame dispose())
        */

        try{
            awtThreadHandle.join();
        } catch(InterruptedException e){
        }

        /*
        * Shutdown program threads
        */
        shutdownOtherThreads();
    }
}

It seems to work. Is this a right way of doing things?

Thanks.

[Darryl Burke]

Depends on how insulated that code is against other classes being in the mix. All it takes is just one running Swing Timer to keep the EDT alive.

edit Additionally, setDefaultCloseOperation(...) isn't a static method.

[Rob Spoor]

Mikpo Siru wrote:I want to perform a shutdown routine on the threads when the JFrame is closed.

Use a WindowListener and its windowClosed method. Don't be confused with windowClosing - that's called when you press the X button to close the frame. windowClosed will be called when the window is actually closed.

[Mikpo Siru]

Thanks for your suggestions.

[Rob Spoor]

You're welcome