How do I draw bar charts using java api

Hi floks,
How do i draw bar graphs using java api/or any third party tools. Actually I have to draw graphs for given data, and show into swing object and finally save to html file. So that i have to save into gif or jpeg format.
I cound't find the java api for drawing bar graphs. Could any body suggest me in this regard. Also suggest me where do i get the sufficient information on the net.
Thanks in advance.
Venkat

You have following choices:
Visual Engineering's KavaChart at http://www.ve.com/kavachart (commercial)
Sitraka's JClass at http://www.sitraka.com (commercial with trial version)
HIH

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Valentin Crettaz
Sun Certified Programmer for Java 2 Platform

Some open source options (all sourceforge projects)
http://jrefinery.com/jfreechart/
http://jopenchart.sourceforge.net/
http://chart2d.sourceforge.net/
http://jcharts.sourceforge.net/

Just a note that the home page for JFreeChart is:
http://www.object-refinery.com/jfreechart
Regards,
Dave Gilbert
JFreeChart Project Leader