JFlex is free software and available for download from this page and a number of mirrors.
The distribution includes installation procedures,
documentation, pre-compiled classes and source code of JFlex.
All documentation for JFlex is also available online.
Pre-releases of upcoming JFlex versions can be found at sourceforge.
JFlex has three mailing lists:
jflex-announce is low traffic and read-only for announcements of
new releases, jflex-users is for help and discussions, and jflex-devel
for developer discussions. If you would like to subscribe
to either of the first two, please enter your email address below, check the
appropriate boxes, and press [subscribe]. For the developer list, see the
mailing lists page.
To prevent abuse you will receive a request for confirmation of your wish to subscribe.
If you reply to that request from the same address you wished to subscribe, you should receive
a final confirmation that your subscription to the list was successful.
More information on the lists can be found on the mailing lists page.
If you encounter any problems, please send mail to