We are vendor of a product called Webswing which is a web server that allows to run any Java Swing application inside a web browser, using only pure HTML5.
We've been contacted by QFS to see whether their UI test tool QF-Test may also work for this special Java / Web system.
This cooperation worked out pretty well and QF-Test turned out to be a great tool even for such very special cases.
In fact the guys found a really cool way to allow UI tests previously developed for the Java application to be executed on a Webswing server via the web browser nearly unchanged. Awesome!
Be sure to check it out when you are looking for a UI testing tool.