Posted by gouessej on Mar 16, 2018; 10:54am
URL: https://forum.jogamp.org/NoSuchMethodError-on-initSingleton-tp3716593p4038737.html

It didn't solve your problem because either the JARs of the latest version aren't in your classpath (or the JARs of several versions of JOGL are in your classpath) or your source code uses the old package names whereas they have been modified in JOGL 2.3. We only maintain the latest version which is currently JOGL 2.3.2, please use it.