What is the lowest version of Java, ObjectDB will run on?

I have a legacy production environment that is running "jre1.6.0_16".

I am trying to upgrade from 1.0.4 to the latest.

Thanks for your time.

Current ObjectDB versions are tested with JDK 1.7, so JDK 1.7 or later should be fine.

Maybe it can also work with JDK 1.6 but it has not been tested recently.