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

WWW: http://www.bluej.org