Good to hear from you again. I haven't heard from the Pace/Cornell people
in a while so I don't think much of anything has been done on checking Java code recently. I will look this weekend to so see if I can find any of the software associated with that project in my "files". I was never able to get it running on a server locally -- mostly because it required getting JUnit to work and my Java skills were and aren't that great.
However, -- these days a lot of CS programs are teaching Python and for that there is some active development by Goeff Goehle that you might be interested in. You can start at webwork.maa.org/planet and scroll down to Goeff Geohle's post from May 01 2016. (for some reason the link to Geoff's blogspot isn't responding today -- but the post is preserved on our blog aggregator). The original post is at http://webworkgoehle.blogspot.com/2016/04/python-in-webwork.html
He may have done more work that isn't documented yet, since he was helping CS professors at Western Carolina University with their courses.
-- Bug me this weekend if you still want the javaAnswerEvaluator files and I'll see what I can find.