BlueJ is an

integrated development environment An integrated development environment (IDE) is a Application software, software application that provides comprehensive facilities for software development. An IDE normally consists of at least a source-code editor, build automation tools, an ...

(IDE) for the

Java programming language Java is a high-level, general-purpose, memory-safe, object-oriented programming language. It is intended to let programmers ''write once, run anywhere'' ( WORA), meaning that compiled Java code can run on all platforms that support Jav ...

, developed mainly for educational purposes, but also suitable for small-scale

software development Software development is the process of designing and Implementation, implementing a software solution to Computer user satisfaction, satisfy a User (computing), user. The process is more encompassing than Computer programming, programming, wri ...

. It runs with the help of Java Development Kit (JDK). BlueJ was developed to support the learning and teaching of

object-oriented programming Object-oriented programming (OOP) is a programming paradigm based on the concept of '' objects''. Objects can contain data (called fields, attributes or properties) and have actions they can perform (called procedures or methods and impl ...

, and its design differs from other development environments as a result. 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 Object may refer to: General meanings * Object (philosophy), a thing, being, or concept ** Object (abstract), an object which does not exist at any particular time or place ** Physical object, an identifiable collection of matter * Goal, an ai ...

, communication through method calls) are represented visually and in its interaction design in the interface.

History

The development of BlueJ was started in 1999 by

Michael Kölling Michael Kölling is a German computer scientist, currently working at King's College London, best known for the development of the BlueJ and Greenfoot educational development environments and as author of introductory programming textbooks. In 2 ...

and John Rosenberg at

Monash University Monash University () is a public university, public research university based in Melbourne, Victoria (state), Victoria, Australia. Named after World War I general Sir John Monash, it was founded in 1958 and is the second oldest university in the ...

, as a successor to the

Blue Blue is one of the three primary colours in the RYB color model, RYB colour model (traditional colour theory), as well as in the RGB color model, RGB (additive) colour model. It lies between Violet (color), violet and cyan on the optical spe ...

system. Blue was an integrated system with its own programming language and environment, and was a relative of the

Eiffel Eiffel may refer to: Places * Eiffel Tower, in Paris, France, designed by Gustave Eiffel *:* Champ de Mars – Tour Eiffel station, Metro station serving the Eiffel Tower * Eiffel Bridge, Ungheni, Moldova, designed by Gustave Eiffel * Eiffel Bri ...

language. BlueJ implements the Blue environment design for the Java programming language. In March 2009, the BlueJ project became

free and open source software Free and open-source software (FOSS) is software available under a Software license, license that grants users the right to use, modify, and distribute the software modified or not to everyone free of charge. FOSS is an inclusive umbrella term ...

, and licensed under GPL-2.0-or-later with the

Classpath exception A GPL linking exception modifies the GNU General Public License (GPL) in a way that enables software projects which provide library code to be " linked to" the programs that use them, without applying the full terms of the GPL to the using program. ...

. BlueJ is currently being maintained by a team at

King's College London King's College London (informally King's or KCL) is a public university, public research university in London, England. King's was established by royal charter in 1829 under the patronage of George IV of the United Kingdom, King George IV ...

, England, where Kölling works.

Supported language

BlueJ supports programming in

Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...

and in Stride.Stride
/ref> Java support has been provided in BlueJ since its inception, while Stride support was added in 2017.

References

Bibliography

* *

External links

*
BlueJ textbook
{{DEFAULTSORT:Bluej Integrated development environments Free integrated development environments Cross-platform free software Free software programmed in Java (programming language) Java development tools Java platform Linux programming tools Software development kits MacOS programming tools Programming tools for Windows Linux software Educational programming languages Pedagogic integrated development environments 1999 software

History

Supported language

See also

References

Bibliography

External links