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.
Requires 64-bit Windows, Windows 8 or later. Also available: Standalone zip suitable for USB drives.
Requires macOS 11 or later. Also available: A version for Macs with Intel processors (2021 and earlier) - see this link for how to tell which processor you have.
Requires 64-bit Intel processor running Debian 11 or Ubuntu 20.04 or later. Also available: A version for ARM64 processors (e.g. Raspberry Pi).
Please read the Installation instructions. (Works on most platforms with Java/JavaFX 21 support).
"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.
Our free Blueroom website offers teaching resources and the chance to engage with other educators using BlueJ around the world.
Tutorials and reference materials for working in BlueJ.
We have several extensions available that add to BlueJ's base functionality.
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 an open source licence for JProfiler (a Java profiler).