This is a very simple question, and I'm embarrassed to say I've had no luck on my own on github or elsewhere finding what I need (too many choices!).
I think I'm using a very old version of the Processing core.jar file that I downloaded with Proclipsing. I no longer use Proclipsing, but still use the core.jar file as an externally referenced library in Eclipse. Where can I get the most current core.jar file (and any other primary library references currently used by Processing). I'm running into PGraphics memory leak issues and I think it's a problem with my ancient jar file that dates back to 2010.