I kept getting this error when I would run "processing":

(precise)mweeks@localhost:~/processing-2.2.1$ ./processing
(precise)mweeks@localhost:~/processing-2.2.1$ /home/mweeks/processing-2.2.1/java/bin/java: 1: /home/mweeks/processing-2.2.1/java/bin/java: Syntax error: end of file unexpected (expecting ")")

I fixed it, and now I don't clearly remember what I did. I think I had to 
update some software, like the Java run-time environment.

-MCW, August 2014