JCommon is a free general purpose library for Java that is shared by several other projects, including JFreeChart and JFreeReport.

See:
Description

Packages

com.keypoint	PNG Encoder.
org.jfree	The root package for the JCommon class library.
org.jfree.date	Date classes.
org.jfree.io	Input/output related classes.
org.jfree.layout	Custom layout managers.
org.jfree.resources	General localised resources for the JCommon class library.
org.jfree.threads	Additional support for multi-threaded programs.
org.jfree.ui	Utility classes for creating user interfaces.
org.jfree.ui.about	Classes for providing information about an application.
org.jfree.ui.about.resources	Resource bundles for items that require localisation.
org.jfree.util	General utility classes.
org.jfree.xml	XML parser.
org.jfree.xml.factory.objects	Object descriptions for the parser.

JCommon is a free general purpose library for Java that is shared by several other projects, including JFreeChart and JFreeReport.

Please visit http://www.jfree.org/jcommon/index.html for the latest information about JCommon.