JFreeChart Download Page
Here you can download the correct versions of the LGPL libraries jcommon-0.7.0.jar and jfreechart-0.9.3.jar. When you have downloaded and unzipped the files, place them in the console/lib directory of your JRockit installation.
Note! If your JRockit Management Console runs like it should, you do not need to download the JFreeChart libraries.
Go to JFreeChart for more information about JFreeChart.