Hi
Java since 1996 (jdk 1.02 IIRC), followed by mainly scala since 2008
3 month with jme1 (jme2 was beta) + scala in 2008
1 month with jme3 since may 2014
Since 2008, I practive java only to maintain some maven’s plugin and for jme3. I did lot of scala and few month of javascript and dart (last year).