Well, yes, with some help. Java Swing methods that work on this level are unaware of the special behavior of Vision Components. If you install my Simulation Aids module, it installs a generic fix for this in the Jython interpreter. And then your component methods and custom properties will work in jython no matter how you get a hold of the object. (:
If you want your brain fried, look at this topic (start here but go back through the whole thing for context):