At this time, the source code for
InstantDB is not made publicly available, nor are there any plans
to do so. Please don't ask for the InstantDB source code - as it always pains
to have to refuse a request.
If you're interested in seeing the source code for a Java database,
try one of the following:
Of course I'd much prefer you used InstantDB, but if free databases aren't for you,
and you'd rather hand over some cash, you could try:
And, not really a Java database, more a persistent storage engine
for Java objects, but what list of Java database links would be
complete without PSE ObjectStore
from ODI.