Swing GUI is not updating

Question

I have simple Java Swing application which uses zip4j to encrypt and unpack zip file. It\'s done by this part of code:

ZipFile zipFile = new ZipFile(\"dataStorag         


        

Answer 1

Please read Concurrency in Swing.

What you are doing is using up all resources of the EDT by sleeping and updating, not leaving any time for it to actually redraw your GUI. The EDT is meant for small operations on the GUI. You should never call Thread.sleep() on the EDT.

What you could do is make a Timer that would run your check every second until the check passes. That way the EDT would be free to not freeze.

A much better way of doing this is by using a SwingWorker. It has methods that do your specific thing:

• A task to do in the background (In your case - unzip)
• A method to publish a partial result to the GUI (in your case % done)
• A method to react to partial results (In your case - update progress)
• A method to invoke when done (Not shown in your case, but useful anyway).