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Taking a hint from another post to your message, I found that when adding points to a series (which I do before creating the chart), the following speeds things up by a factor of 4:

XYSeries s1 = new XYSeries(...);
s1.setNotify(false);
add all points to the series
s1.setNotify(true);

I found the same thing in using the plotting package. I found it best to lower the priority of the program doing the plotting so other tasks could get some CPU time.

I found that you can right click on the plot to get a menu that allows printing. Or do you need some special print handling?