If you do not specify the system directory when starting up ,
the current directory becomes the system directory.
uses the derby.system.home property
to determine which directory is its system directory - and thus what databases
are in its system, where to create new databases, and what configuration parameters
to use. See for
more information on setting this property.
If you specify a system directory at startup that does not exist, creates
this new directory - and thus a new system with no databases-automatically.