PieCharts and Graphs, urgent...

[san geetha]

hi,
Have a web-appln which has pie-charts and graphs being used extensively.
They have to be generated dynamically, say i have a select list, with respect to what is selected in the list i need to generate a pie chart, graph dynamically...
Any pointers about which software to use,that is faster or can produce charts dynamically?

Thanks,
Sangeetha

[kri shan]

Use open source charting - JFreeChart foo creating the charts.
Try open source reporting tool iReport for creating the Pie-chart. iReport inturn uses JFreeChart.

[Peter Rooke]

JavaWorld - Chart a new course with JFreeChart

Maybe a bit old [bits of the API may have changed slightly], but still worth a look.