how can i run the file correctly?

[amator]

After i have downloaded the file jfreechart.zip from the net address,i install in my computer following the tutorial.But when i compile the JFreeChartDemo.java in the "demo" directory, the java compiler tell me that "XYDataset can't be resolved" ,which means that I can't compile the file without the data file. how can i run the file correctly?

[David Gilbert]

XYDataset is in the JCommon class library. You can use the precompiled version in the jcommon-0.6.3.jar file or download the source code from the URL mentioned in the installation docs.

DG.