Here's how one might list all files matching a pattern in bash:
ls *.jar
How to list the complement of a pattern? i.e. all files not matching *.jar?
Use egrep-style extended pattern matching.
ls !(*.jar)
This is available starting with bash-2.02-alpha1. Must first be enabled with
shopt -s extglob
As of bash-4.1-alpha there is a config option to enable this by default.