JLex: A Lexical Analyzer Generator for Java(TM)

Latest version 1.2.6 of JLex updated on February 7, 2003.

JLex is a lexical analyzer generator, written for Java, in Java.

JLex was developed by Elliot Berk at Princeton University. It is now maintained by C. Scott Ananian.

Please send bug reports to cananianalumni.princeton.edu.

If you are interested in JLex, you may also wish to look at JFlex.

A mailing list has been set up for announcements of new CUP/JLex releases. To subscribe, send mail to majordomo@cs.princeton.edu with "subscribe jtools" in the body of the message.

• Source Code
  The Java implementation of JLex should be downloaded and compiled into runnable form.
• User Manual
  Format of JLex specification files, performance of lexical analyzers generated with JLex, and other important issues.
• Copyright Notice, License, and Disclaimer
• Installation Instructions
  A README file that provides information regarding JLex compilation and usage.
• Sample Input
  A sample specification file that can be used to generate a simple lexical analyzer using JLex.
• CUP/JLex interoperability example (tgz) (zip)
  A minimal example illustrating the use of a CUP parser with a JLex scanner.
• Bugs
  A web site that lists bug reports from JLex users, along with the current status of each bug.
• Version Archive
  Previous versions of JLex are available.
  • Version 1.1.1
  • Version 1.1.2
  • Version 1.1.3
  • Version 1.1.4
  • Version 1.1.5
  • Version 1.2
  • Version 1.2.1 (fixed bugs #6 and #10)
  • Version 1.2.2 (constructor now also accepts java.io.Reader)
  • Version 1.2.3 (fixed bug #13)
  • Version 1.2.4 (fixed bugs #1 and #9)
  • Version 1.2.5b6 (fixed bugs #5 and #12. Also unicode support, misc. bug fixes, and other goodies.)
    (Released 13-Apr-2000)
  • Version 1.2.5b7 (fixed 'illegal constant expression' bug with Sun JDK 1.3.)
    (Released 16-May-2000)
  • Version 1.2.5 (documentation fixes only.)
    (Released 6-Sep-2000)
  • Current version 1.2.6 (renamed 'assert' and fixed comment parsing bug.)
    (Released 7-Feb-2003)

JLEX COPYRIGHT NOTICE, LICENSE AND DISCLAIMER.

Copyright 1996-2003 by Elliot Joel Berk and C. Scott Ananian

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name of the authors or their employers not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission.

The authors and their employers disclaim all warranties with regard to this software, including all implied warranties of merchantability and fitness. In no event shall the authors or their employers be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software.

Java is a trademark of Sun Microsystems, Inc. References to the Java programming language in relation to JLex are not meant to imply that Sun endorses this product.