how to represent the output from a query in bar or pie graphs

My query will retrive the counts of different groups.I would like to represent the count which will be different for different groups in a graphical format that is either bar graph or pie graph.can you please suggest me any procedure or give me a piece of code as how to do it.

thanks in advance

Not strictly a JDBC question, however you can use a third party API to produce graphs. jCharts for example. Have a google there will be others.