Jakarta previously hosted Regexp, a 100% Pure Java Regular Expression package.

As there were no new features or releases planned, the Jakarta Regexp project was retired in April 2011.

Read-only Resource Link(s)
Website jakarta.apache.org/regexp
Mailing List Archives dev | user
Issue Tracker Bugzilla
SVN svn.apache.org/jakarta/regexp
Downloads archive.apache.org/dist/jakarta/regexp/ | KEYS

Jakarta Regexp users are encouraged to use similar features in newer Java versions, such as java.util.regexp