SwingWorker Hanging

My program was hanging; I thought it was caused by the deadlock; but as it turns out it was some exception that was never shown ūüôĀ

This particular behavior was explained in this post:

A few things to remember, though: the¬†done()¬†method is NOT abstract, so you aren’t required to override it. You should, though. If your¬†doInBackground()¬†implementation throws an exception, that exception will be swallowed unless¬†done()¬†has been overridden.¬†Also, don’t make changes to your GUI from inside the¬†doInBackground(), unless you useSwingUtilities.invokeLater(Runnable), as¬†doInBackground()¬†is executed from a different thread than the EDT and making GUI changes from a background thread is asking for strange and inexplicable bugs.

Note that you need to call the get() method; I have solved this problem by adding the following to the class extending SwingWorker:

    protected void done(){
        try {
        } catch (InterruptedException ex) {
        } catch (ExecutionException ex) {




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About Neil Rubens

see http://ActiveIntelligence.org
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