posted 19 years ago I'd use Jemmy with JUnit.
But more importantly, I'd try to make the GUI Swing layer as thin as possible, so that it needs only few tests.
Moving this to our Testing forum. You might also want to search that forum - it's a very frequently asked question.
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus