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How can I programmatically generate pie charts from java? I have some data that is processed by a program, then I want to create an image file (PNG, GIF, etc) that has a pie chart. Is there a library that does this, or at least which I can use to do this?
Alternately, would it be better to use a library that will draw pie charts in a JFrame and then somehow automatically screenshot those?
JFreeChart can generate pie charts and can save the resultant chart to JPEG format. Here is an example of how to do so. Here is a 3D example.
There are more examples and documentation available in the developers guide.
Other charting libraries which generate piecharts: