How do I update a JProgress Bar inside a thread?

[Corwin Moyne]

I have a thread that runs some data. I want the progress bar to update as the thread runs. But how can I get the info from the thread to set the progress bar value?

What is the correct way to achieve this?

[Nepomuk]

A clean way to do this would be using the observer pattern (sometimes called the listener pattern). Simply put, you register the progress bar as a listener which waits for something in the thread to change. When something changes the thread says "hey, I've done something!" and the progress bar reacts to that.