I'm not sure what you mean by "include it with the source code", because the source code won't be part of the application once it's built.
You can either distribute the library jar together with the application jar, and have the application jar file manifest refer to the library in the
Class-Path attribute.
Or you could re-package them into a single jar file, thus side-stepping any classpath issues.
[ July 28, 2007: Message edited by: Ulf Dittmer ]