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What is the best way to control the size of the chart? I have tried to use setSize but that doesn't seem to work.

Not sure I fully understand your question. If you are asking whether or not it is possible to dynamically change the values of the pieces of your pie chart the answer is yes.

Simply create your dataset object in the java code, and when you update the dataset the PieChart will automatically update.

Windows 2000 professional for developement but I also test against Solaris