Disk-backed allocations or collections
... the second may be even more immediately useful to you): http://www.quadcap.com/ http://www.coyotegulch.com/jisp/ Roedy Green also see http://mindprod.com/jgloss/hermitcrab ...
http://www.javakb.com/Uwe/Forum.aspx/java-databases/972

Database with Java
... are quite a few, with more on the way.  My company, Quadcap Software, makes QED, a pure Java SQL92 database.  It's a free ... and has a low cost license for external redistribution... http://www.quadcap
http://www.javakb.com/Uwe/Forum.aspx/java-databases/344

Embedded Java database recommendations
... again, no updatable resultsets. Thanks Moray Stan Bailes You might look at QED: http://www.quadcap.com/products/qed/ Updateable ResultSets, no royalties, free download... Stan Bailes Quadcap
http://www.javakb.com/Uwe/Forum.aspx/java-databases/333

Geting data from joined tables
... In fact there is a database that just works like this. Look at quadcap.com. Regards Bernard Mladen Adamovic You can use select t1.id as t1_id, t2.id ...
http://www.javakb.com/Uwe/Forum.aspx/java-databases/2429

Compare Java DBMS - Cloudscap/Derby, hSQLDB, others
... options? Here are the ones I've heard of: Cloudscape/Derby Quadcap QED hSQLDB Daffodil Lee Fesperman Add FirstSQL/J to your list. See my ...
http://www.javakb.com/Uwe/Forum.aspx/java-programmer/19169

Migrating project from MySQL to embedded, relational Java-Database
... www.smallsql.de/ )   commercial: http://www.smallsql.de/faq-general.html - Quadcup QED ( http://www.quadcap.com/home.html )   commercial - ozone ( http://www.ozone-db.org/frames/home/what.html )   Objekt ...
http://www.javakb.com/Uwe/Forum.aspx/java-programmer/37555