BlueJ

BlueJ is an integrated development environment (IDE) specifically designed for the teaching and learning of the Java programming language. It provides a visual representation of class structures, allowing users to observe the relationships between objects and classes through a graphical interface. The environment allows for the creation of objects and the invocation of methods directly, which assists in understanding the execution flow of object-oriented programs. It is primarily intended for introductory computer science education.

The software supports the development of Java applications by providing a code editor, a compiler, and a debugger within a single workspace. It is compatible with standard Java Development Kits and allows for the export of projects to other development environments. While it is built to simplify the initial learning curve for students, it includes the necessary tools for writing, compiling, and testing Java code. The application is available for Linux and is licensed under the GPL-2.0-only with Classpath-exception-2.0.