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Starting background process

Narayanan Jayaraman
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Joined: Apr 09, 2003
Posts: 52
How to start a background process from Swing application. In my swing application I start a background process thread by clicking a button. But When I close the application it also closes the thread. Any idea how to do it ?.
Lee Barney
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Joined: May 07, 2003
Posts: 37
Is this process to be a java process or a native process?
Narayanan Jayaraman
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Joined: Apr 09, 2003
Posts: 52
This one is Java process.
Nathan Pruett

Joined: Oct 18, 2000
Posts: 4121

Are you setting the default close operation of the frame to EXIT_ON_CLOSE? That just calls System.exit() when you close your frame and kills the JVM. Same thing as if you attached a WindowListener to your frame and called System.exit(). If you want your frame to go away, but the thread to keep running, either hide (setVisible( false ) or HIDE_ON_CLOSE) or get rid of ( dispose() or DISPOSE_ON_CLOSE) your frame on closing, and wait for your thread to finish before calling System.exit(). If you have a reference to the thread, you can simply call thread.join() to do this. Important point - You have to put the code to wait for your thread to end and then call System.exit()... you can't skip this part because once you start up a GUI application in Java you must call System.exit() specifically because the AWT Event thread won't let the JVM die on its own.

Write once, run anywhere, because there's nowhere to hide! - /. A.C.
Narayanan Jayaraman
Ranch Hand

Joined: Apr 09, 2003
Posts: 52
I use dispose() method to close the frame. But the background process has to run forever. Is it possible to start the process in different JVM ?
I agree. Here's the link: http://aspose.com/file-tools
subject: Starting background process
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