BlueJ is an integrated Java environment specifically designed for introductory teaching.

The aim of BlueJ is to provide an easy-to-use teaching environment for the Java language that facilitates the teaching of Java to first year students.

Special emphasis has been placed on visualisation and interaction techniques to create a highly interactive environment that encourages experimentation and exploration.

Here are some key features of "BlueJ":

· fully integrated environment
· graphical class structure display
· graphical and textual editing
· built-in editor, compiler, virtual machine, debugger, etc.
· easy-to-use interface, ideal for beginners
· interactive object creation
· interactive object calls
· interactive testing
· incremental application development.