Project Scenegraph aims to provide scenegraph functionality at the Java level, and has a few cool JavaFX demo applets using the SceneGraph API.You'll need the very latest Java 6 Update 10 plugin to run these demos, and the page will take a little time to work as it has a number of other JARs to download.
https://scenegraph-demos.dev.java.net/demo-applets.html
