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 7 or later. Also available: Standalone zip suitable for USB drives.
Requires OS X 10.12 or later.
Requires 64-bit, Debian buster or Ubuntu 18.10 or later. There is also a flatpak available (maintained by someone else).
"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.
The BlueJ project is supported by Oracle. We benefit from an open source licence for JProfiler (a Java profiler).