Now you can use this Java charting package. It can be used as bean, applet, in JSP pages, in PDF files (FOP), in mobile devices (Android and J2ME), with SWT.

This program can support more than 18 unlike chart types and combinations of them like piecharts, areacharts, linecharts, radarcharts, barcharts and a richt set of features like labels, notes, tips, date axis, multiple axis, transparencies, logarithmic axis, pattern fillings, stacked axis, stacked charts, curves and many more. Also the source code is available.