BlueJ is an

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

(IDE) for the

Java programming language Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers ''write once, run anywh ...

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

software development Software development is the process of conceiving, specifying, designing, programming, documenting, testing, and bug fixing involved in creating and maintaining applications, frameworks, or other software components. Software development invo ...

. 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", which can contain data and code. The data is in the form of fields (often known as attributes or ''properties''), and the code is in the form of ...

, 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 ...

and John Rosenberg at

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

, as a successor to the

Blue Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when ...

system. BlueJ is an IDE (Integrated Development Environment). Blue was an integrated system with its own programming language and environment, and was a relative of the Eiffel 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 a term used to refer to groups of software consisting of both free software and open-source software where anyone is freely licensed to use, copy, study, and change the software in any way, and the sour ...

, 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 research university located in London, England. King's was established by royal charter in 1829 under the patronage of King George IV and the Duke of Wellington. In 1836, King's ...

, England, where Kölling works.

Supported language

BlueJ supports programming in

Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...

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

History

Supported language

See also

References

Bibliography

External links