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