Sun Java System Application Server 9.0 Update 1 introduces two new asadmin commands for starting and stopping the Java DB Network Server.
Use the asadmin start-database command to start an instance of the Java DB network server:
start-database [--dbhost 0.0.0.0] [--dbport 1527] [--dbhome path]
The default value for the host is 0.0.0.0, which enables Java DB to listen on localhost as well as the IP/hostname interfaces. The value for the dbhome property is the location of where the Java DB databases reside. The default path is appserver_install_dir/javadb.
Use the asadmin stop-database command to shut down a running instance of the Java DB network server:
stop-database [--dbhost 0.0.0.0] [--dbport 1527]