unit test « hsqldb « Java Database Q&A

1. starting and stopping hsqldb from unit tests    stackoverflow.com

I'm trying to create integration tests using hsqldb in an in memory mode. At the moment, I have to start the hsqldb server from the command line before running the unit ...

2. What is the difference between HSQLDB and JavaDB? Which one is suitable for unit testing?    stackoverflow.com

Could you tell me the differences between HSQLDB and JavaDB? And which one should I use in unit testing, assuming that I only use standard features? Thanks.