TrueMusic is a simple Java music player that supports MP3, WAV, Ogg Vorbis, AIFF, and AU. It requires JRE 5+ (attempts to use native LookAndFeel in Sun implementions).
The playlist UI is now table-based. Start-up time was made faster with playlists saved as serialized objects (backed up as m3u files).
URL: TrueMusic - Java mp3 player