Posted by Demoscene Passivist on Jun 05, 2011; 6:24pm
URL: https://forum.jogamp.org/Managing-dynamic-textures-tp3020910p3027090.html

>I don't remember exactly where I downloaded JOGL, but the utils are under
>the com.sun package rather than com.jogamp, which is why I couldn't find them.

Seems u are using the old JOGL 1.1.1a wich is "deprecated". Try switching to JOGL2.