Learn Java with BlueJ. BlueJ first appeared in 1999, named simply Blue. ... Classes can be individually compiled; you don’t have to rebuild an entire project if you’ve modified a single class.

Company says it was a "mistake" to try to patent a programming idea already used in BlueJ Java project. Written by Stephen Shankland, Contributor Jan. 29, 2007 at 12:06 p.m. PT.