Posted by Predrag Bokšić on Dec 27, 2017; 5:36pm
URL: https://forum.jogamp.org/Jogl-Jogamp-on-Java-9-tp4038012p4038448.html

Douglas, when you git clone the j3d project and curl the jogl files based on the j3d/j3d-core/README-build.html webpage instructions, you create 4 directories. The j3d directories need to be named like this:
j3d-core
j3d-util
vecmath
The jogl directory is named
jogl-v2.3.1

However, the build.xml file in j3d-core directory refers to the jogl-v2.3.2 directory that does not exist initially. This error needs to be corrected to begin compiling your own j3d project.