I downloaded and installed j3d... enough times... and yet... it shows no sign of working. import javax.media.j3d is sucessful, but when ever i try to use classes from the package, i'm told they don't exist. No source code i've found anywhere works, and whenever i try to run an example applet on a website, i am greeted by a gray screen with a cup of coffee at the top. if they really feel like messsing with me, they'll eventually turn the coffee cup into a red x, to show me that they're still there. Please... Someone...
Specifically you need to place the Java3D jars into <JDKDirectory>/jre/lib/ext where <JDKDirectory> is the directory where your Java SDK is installed. Then you won't need to do anything to the CLASSPATH.
Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction. - Ernst F. Schumacher
FYI - Java3D is no longer being maintained. Sun has opted for a SGI syndicated OpenGL wrapper approach. You can find the project here While I am a bigger fan of JOGL than Java3D it still has some major problems. Personally, I prefer the SWT OpenGL wrapper for coding OpenGl with Java. But for true OpenGl programming, I prefer to do it in C/C++