Time ago I read about Java 3D integration into Java FX, the article reported the main Java 3D project as "dead" for rewriting the 3D engine into FX.
Sun has stated that they are no longer focusing on improvements to the Java3D API. The official announcement is at:
https://java3d.dev.java.net/servlets/NewsItemView?newsItemID=5689 http://forums.java.net/jive/thread.jspa?threadID=36022
As you can see, Sun itself is shifting their focus to a new 3D scenegraph API that will ultimately be a part of JavaFX.
Otherwise, there are numerous high-quality 3D APIs available for Java (eg, JMonkeyEngine or Ogre3D), or you can always use lowlevel APIs such as JOGL and LWJGL.