http://www.martiansoftware.com/jsap/
JSAP License

Copyright © 2004, Martian Software, Inc. All rights reserved.

JSAP is licensed under the Lesser GNU Public License. A copy of this license is available at http://www.fsf.org/licenses/licenses.html#LGPL.

Note: As of the time of this writing there has been much discussion regarding the LGPL and Java-based projects. As a result, the following LGPL clarification applies (based upon a similar clarification at http://www.hibernate.org):

    JSAP is Free Software. The LGPL license is sufficiently flexible to allow the use of JSAP in both open source and commercial projects. Using JSAP (by importing JSAP's public interfaces in your Java code), and extending JSAP (by subclassing) are considered by the authors of JSAP to be dynamic linking. Hence our interpretation of the LGPL is that the use of the unmodified JSAP source or binary, or the rebundling of unmodified JSAP classes into your program's .jar file, does not affect the license of your application code.

If you modify JSAP and redistribute your modifications, the LGPL applies.