Files with jj suffix can be typically encountered as some kind of Java Compiler Compiler file created by parser generator.

There is one other file type using
the JJ file extension!

jj file icon.jj - Doodle C64 Compressed image format

Detailed description

Software that works with jj file extension

Add comment

Bookmark & share this page with others:

JJ file extension - JavaCC file

What is jj file? How to open jj files?

File type specification:

Various data file type icon Various data file type

jj file icon: jj filetype icon

File extension jj is mainly associated with the JavaCC (Java Compiler Compiler) a parser generator for use with Java applications.

A .jj file stores various data used for internal purposes of the Java Compiler Compiler.

The default software associated to jj file type:

Java icon

Oracle Corporation logo Java  Multiplatform software

Company or developer:
  Oracle Corporation

Java is a set of developing applications and specifications used to create software in Java programming language. Java is used on many computing platforms from desktop computers to mobile phones.

Java source code derives much syntax from C and C++ programming language but has a simpler object model. To run applications written in Java the Java runtime environment must be installed on a device.

Help how to open JJ files:

It does not seem likely that you can manually open or otherwise access this type of .jj files.

How to convert file with extension JJ:

As far as we know, conversion for .jj file is not possible.

List of recommended software applications associated to the .jj file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open jj file, edit jj file, convert jj file, view jj file, play jj file etc. (if exist software for corresponding action in's database).

  • Others jj file

Unspecified and all other actions for computer programs working with jj file - JavaCC file

Click on the software link for more information about Java. Java uses jj file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).


Previous file extension
JIB file extension > Various data file types

Next file extension
file extension JLP


Follow us!

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed