ive ran into some trouble configuring java3D to work with my IDE environment...
I have downloaded j3d-1_5_2-linux-i586.zip, and unpacked j3dcore.jar, j3dutils.jar, v
As an addendum to given answers, what helped me set java 3d was: Copy and paste all the .dll files from "C:\Program Files\Java\Java3D\1.5.X\bin\" to "C:\Program Files\Java\jre6\bin\". So form Java3D to my actual jre6(from bin to bin).
Previously I also set the classpath/(you can also set path) to 3dcore.jar, j3dutils.jar, vecmath.jar, j3dcore-ogl.dll but still did not work.
After copy past j3dcore-ogl.dll (described above) and left classpath to 3dcore.jar, j3dutils.jar, vecmath.jar (in "C:\Program Files\Java\Java3D\1.5.X\ext\") it worked fine.
I have found help here: http://www.xinapse.com/Manual/install_windows.html Look at the point 2.
Best regards