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Wait for the Swing GUI to close before continuing.

I am writing an application that requires the user to enter some data into the Swing GUI, which the application will then use. After the user enters data, a graphical interface is no longer required, since the application will write some data to files.

The general idea is this:

launchGui(); closeGui(); continueWithComputation();

I understand that Swing uses several threads in the background, which I understand, so the program does not block until the GUI closes.

Is it possible to somehow expect the completion of the GUI (a single JFrame closed with dispose() ) before continuing with continueWithComputation() ?

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3 answers

Is it possible to somehow wait for the GUI to complete (one JFrame is closed with dispose ()) before continuing with continueWithComput ()?

  • Add windowListener user actions

  • from code to calling JFrame#setVisible(false) , then you can run continueWithComputation() , you need to close this JVM on System.exit(0) , otherwise it will remain in the RAM of the PC until the restart or power off

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Wait for the Swing GUI to close before continuing.

Use a modal dialog. For more information, see the following:

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I just had a similar problem, but without closeGui() and I got this relatively short piece of code using WindowListener and some Java synchronization:

 AtomicBoolean closed = new AtomicBoolean(false); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosed(WindowEvent e) { synchronized(closed) { closed.set(true); closed.notify(); } super.windowClosed(e); } } ); frame.setVisible(true); synchronized(closed) { while (!closed.get()) { closed.wait(); } } // executes after the Frame has been disposed
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Source: https://habr.com/ru/post/1415894/

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