Don't think you need a codec to use java applications. This is a decent site for java apps and games:
http://www.zedge.no/?side=java_applications&pid=259If looking for movie player with codecs,
SmartMovie is good.
QUOTE
SmartMovie is a full screen, high performance movie player, well known from all other Symbian platforms. It supports standard AVI format and downloadable DirectShow codecs (e.g. DivX or XViD). The program comes with fast PC converter and works with subtitles.