Posted by gouessej on Jan 16, 2013; 10:48pm
URL: https://forum.jogamp.org/requested-graphics-configuration-tp4027845p4027879.html

There is already a separate flag in DisplaySettings to handle the alpha bits (which is not very intuitive), just look at the whole source code of this method, I already use settings.getAlphaBits() once:
caps.setAlphaBits(settings.getAlphaBits());