Java db is sun's supported distribution of the open source apache derby 100% java technology database. it is fully transactional, secure, easy-to-use, standards-based -- sql, jdbc api, and java ee -- yet small, only 2mb.

this package adds the optional java db to your jdk 6 installation.

for more information, check out the java db website: http://developers.sun.com/prodtech/javadb/