Java GUI JProgressBar not painting

Question

I have a GUI problem that I would like to get sorted out, but I am baffled as to what\'s happening and hope one of you can explain it. The code base is way too large to upl

Answer 1

The reason it doesn't update is because your UI thread is busy in the ActionPerformed listener doing processing. If you try and interact with your application, you'll notice that nothing on the UI is responsive.

The solution to this is to not do processing on the UI thread - launch another thread, do the processing on that, and call back to the UI thread to update the progress bar.