dany: J2EE became out of date in 2006, J6EE doesn't exist.
after J2EE it became Java EE <version>.
depending on what you call Java web frameworks ...
there are tthe basics, jsp and servlets, then again, you can implement Spring MVC, Struts, and there's GWT.
in GWT, you hardly use any html. you build up the basics of your ui in .gwt.xml files, and using UIBinding you link it to your Java code. it's not MVC, it's something similar, MVP (Model View Presenter).
it does have some advantages, for instance, the GWT compiler takes care of quite some cross-browser differences.
anyway, Java Web UI can mean a variation of things.