On Windows, its not possible to create multiple Newt-Windows at same time with one thread per window. Mostly it crashes with a Null-Pointer Exception. The original report of this bug was on the forum at: http://jogamp.762907.n3.nabble.com/Multiple-Newt-Windows-crashes-since-jogl-2-0-b18-td2289695.html
http://forum.jogamp.org/Multiple-Newt-Windows-crashes-since-jogl-2-0-b18-tp2289695p2383990.html +++ With GLProfile.initSingleton(true) the problem is gone. Thanks :-)