BlueJ

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 4.0.0, released 8 March 2017 (what's new)

Mac OS X

Requires OS X 10.7.3.

Ubuntu/Debian

Installation instructions. Requires OpenJDK or Oracle JDK (8u60 minimum, 8u121 best).

Other

Installation instructions. Works on any OS but requires installing the JDK first (8u60 minimum, 8u121 best).

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

Textbook

"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.

Extensions

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.

Acknowledgements

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