To use ij, you must have derbytools.jar in your classpath. If you are using the embedded driver, you must also
include derby.jar.
To use the import and export utilities and the database class utilities,
you must have derby.jar in your classpath.
To use sysinfo, either derby.jar or derbytools.jar must be in your classpath.
To use Derby tools from a client with the Derby Network Server,
you must have derbyclient.jar and derbytools.jar in your classpath. See the Derby Server and Administration Guide for more information.