The procedure in that link is what I had already done, with the exception I imported jssc.jar, and then put it in the path. Were it not in the path I would not have been able to execute the sketch because the serial class would not be available. The errors I opened this thread with are runtime errors.
If you wish to see for yourself the workspace, and the project within it, can be downloaded from:
http://www.mediafire.com/file/0ag0wrntteferqu/SensorsGraph4.zip/file