Interested in adding reporting capabilities in your Java applications?
See my article on integrating JasperReports library into NetBeans. The article shows you how to produce a simple "hello world" report on up to a simple list of data retrieved from an RDBMS.
Even if you not interested in reporting, this article takes you through the exercises of integrating a third party library, custom file types and Javadoc into NetBeans so that you get all the benefits of NetBeans code complete and integrated Javadoc lookup.