To create a database from a full backup copy at a specified location, specify the createFrom=Path attribute in the boot time connection URL.
If there is already a database with the same name in derby.system.home, an error will occur and the existing database will be left intact. If there is not an existing database with the same name in the current derby.system.home location, the system will copy the whole database from the backup location to derby.system.home and start it.
The log files are also copied to the default location. You can use the logDevice attribute in conjunction with the createFrom=Path attribute to store logs in a different location. With the createFrom=Path attribute, you do not need to copy the individual log files to the log directory.
For more information, see "createFrom=path attribute" in the Derby Reference Manual.