---
name: "jflex"
section: "1"
platform: "linux"
package: "jflex"
version: "1.7.0-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/jflex"
---

# jflex(1)

a lexical analyzer generator (also known as scanner generator) for Java

## NAME

jflex - a lexical analyzer generator (also known as scanner generator) for Java

## SYNOPSIS

**jflex** *\<options\> \<input-files\>*

## DESCRIPTION

JFlex is a lexical analyzer generator (also known as scanner generator) for Java(tm), written in Java(tm). It is also a rewrite of the very useful tool JLex. JFlex is designed to work together with the LALR parser generator CUP, and the Java modification of Berkeley Yacc BYacc/J. It can also be used together with other parser generators like ANTLR or as a standalone tool.

## OPTIONS

- **-d** \<directory\>

  write generated file to \<directory\>

- **--skel** \<file\>

  use external skeleton \<file\>

- **--switch**, **--table**, **--pack**

  set default code generation method

- **--jlex**

  strict JLex compatibility

- **--nomin**

  skip minimization step

- **--nobak**

  don't create backup files

- **--dump**

  display transition tables

- **--dot**

  write graphviz .dot files for the generated automata (alpha)

- **--verbose**, **-v**

  display generation progress messages (default)

- **--quiet**, **-q**

  display errors only

- **--time**

  display generation time statistics

- **--version**

  print the version number of this copy of jflex

- **--info**

  print system + JDK information

- **--help**, **-h**

  print this message

## AUTHOR

This manual page was written by Wolfgang Baer \<WBaer@gmx.de\>, for the Debian project (but may be used by others).