BlueJ

BlueJ
	Screenshot of BlueJ
Original author(s)	Michael Kölling and John Rosenberg
Developer(s)	BlueJ Team
Stable release	5.3.0 / March 20, 2024
Written in	Java
Operating system	Cross-platform
Platform	Java
Available in	Multilingual
Type	Integrated development environment
License	GPL-2.0-or-later with the Classpath exception
Website	bluej.org

BlueJ is an integrated development environment (IDE) for the Java programming language, developed mainly for educational purposes, but also suitable for small-scale software development. It runs with the help of Java Development Kit (JDK).

BlueJ was developed to support the learning and teaching of object-oriented programming, and its design differs from other development environments as a result.^[1] The main screen graphically shows the class structure of an application under development (in a UML-like diagram), and objects can be interactively created and tested. This interaction facility, combined with a clean, simple user interface, allows easy experimentation with objects under development. Object-oriented concepts (classes, objects, communication through method calls) are represented visually and in its interaction design in the interface.

^ Kölling, M. (2008). "Using BlueJ to Introduce Programming" (PDF). In Bennedsen, J.; Caspersen, M.E; Kölling, M. (eds.). Reflections on the Teaching of Programming. Lecture Notes in Computer Science. Vol. 4821. Springer. pp. 182–196. ISBN 978-3-540-77933-9.

[1] Kölling, M. (2008). "Using BlueJ to Introduce Programming" (PDF). In Bennedsen, J.; Caspersen, M.E; Kölling, M. (eds.). Reflections on the Teaching of Programming. Lecture Notes in Computer Science. Vol. 4821. Springer. pp. 182–196. ISBN 978-3-540-77933-9.

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