These instructions are for J805 and later stable editions.
J systems are available for a number of platforms and can be installed and redistributed for free.
J is available as a base system plus optional addon packages.
The base system is the minimal system for running J applications. It includes two user interfaces:
- Jconsole, a command-line front-end
- JHS, a browser-based IDE
A Qt-based IDE is also available in the addons.
Most Windows or Mac users will want to use the All-in-One install.
Linux users who want a debian package should use the Linux deb install.
Android users should use the Android apk install.
Experienced users who want more control, use System/Installation/J805/Zips install.
The J805 download file list can be found here.
Instructions for installing previous versions can be found here.