The GLU tesselators and NURBS surfaces have not yet been exposed in Jogl because of some complexities with the callback mechanisms; they are on the list of things to do. Quadrics however are there and have been tested. See the VertexProgWarp and VertexProgRefract demos; please verify that the using code is correct and file a bug if the Java version doesn't work the same as the C code.
Do you know when tesselators will be implemented ?
I have to come back to gl4java as I'm using lots of tesselators now...
However I'm really happy that you answer to people quickly !
I'm using quadrics in my app to draw circles and all is ok !