This library is meant for shader handling, it will help you to load and setup shaders for rendering in jogl/processing. It’s  does exactly what had been said, no more.

web: http://www.pixelnerve.com/processing/libraries/

Shaderlib

technical:
tested in windows xp 32bit
compiled for j1.5 ( so it should work for macs )

what is does:
- loads glsl/cg shaders
- loads cgfx effect files
- connects to processing easily (as i use processing)
- works with java/jogl just as good

more information:
- documentation is online (javadoc. not much comments sorry)
- examples are in the zipfile
- source code is in the zipfile (eclipse project)