BlueJ 2.2.1, a free integrated development environment
(IDE) for Java aimed at education, has been released. "This is a smallish bug fix release (with a small number of feature
improvements). This release has been made mainly as a preparation for
larger changes in the next BlueJ version, where we will drop support
for JDK 1.4. This release in intended to bring some up-to-date bug
fixes into the last JDK 1.4-compatible version."