I've been writing in Java since I was about 16, after switching from Pascal. Currently I'm a J2SE/J2EE developer.
My projects are:
musique - java audio player, support almost all popular formats, lossy and lossless, gapless-playback, CUE-files, Music Library, and some other cool stuff
sleek-git - cross-platform git server based on apache-sshd and jgit, glue code written in scala
jkeymaster - a library for registering global hotkeys in java with JNA. Supports X11-based platforms, Windows and MacOSX