Posted by kitfox on Mar 27, 2012; 12:31am
URL: https://forum.jogamp.org/question-about-the-GLCanvas-and-GLJPanel-tp3844025p3859953.html

In this code, you're creating and adding both a GLCanvas and a GLJPanel, and then adding the GLCanvas.  Only create the GLJPanel if you want to use Java2D.