A free Java Development Environment designed for beginners, used by millions worldwide. Find out more...

"One of my favourite IDEs out there is BlueJ"
— James Gosling, creator of Java.

Created by
Supported by

Download and Install

Version 3.1.7, released 23 February 2016 (what's new)



You can also download BlueJ as a standalone bundle (zip) which you can run from a USB stick.

Mac OS X


10.7.2 and older:
BlueJ Installer

(uses Apple Java 6 JDK, not recommended for newer systems)

Raspbian Linux

BlueJ is now part of the Raspbian distribution, and it is already installed by default on the current Rasbperry Pi image.

To install or update BlueJ manually, and for tutorials, see the BlueJ on Raspberry Pi page.

Preview Version

Version 4.0.0preview2, released 22 November 2016

Adds support for Stride, Git, automatic error highlighting, tabbed editors and more. Source code

Windows Standalone

Requires no installation, ideal for use on a USB stick.


Works on any OS but requires installing the JDK first.

Download previous versions, or source code
The copyright for BlueJ is held by M. Kölling and J. Rosenberg.
BlueJ is available under the GNU General Public License version 2 with the Classpath Exception (full license text, licenses for third party libraries).

Useful Resources


"Objects First with Java: A Practical Introduction Using BlueJ" is a textbook co-written by the developers of BlueJ and has sold hundreds of thousands of copies worldwide.

Teacher support

Our free Blueroom website offers teaching resources and the chance to engage with other educators using BlueJ around the world.


We have several extensions available that add to BlueJ's base functionality.

Technical Support

If you have a technical issue with the BlueJ software itself (e.g. installation problems, failing to start, etc), you can view our FAQ, contact our technical support or view our bug database.


The BlueJ project is supported by Oracle. We benefit from open source licences for JProfiler, a Java profiler and JIRA.