What's a good java library for graphing tabular data?

Question

i have some tab-delimiter data in csv file, and i want to graph these data, and overlap the graph if possible. i'm currently doing this using excel, which is kinda slow when i have many graphs to make. i'm looking for ways to automate this, the data is generated thru some java process, so i would like to extend the process to graph the data. is there any good java library suited for this purpose? hopefully it's light-weight, open-source, and easy to start with.

thanks!

Answer 1

JFreeChart

Answer 2

JFreeChart seems to be recommended pretty often. It's used in JIRA to generate their charts.

Answer 3

I frequently rely on H2 Database for this, as it has good CSV support; and I'll second @mcandre's and @BrennaSoft's suggestion of JFreeChart.

Addendum: The essential JFreeChart and H2 Database JARs weigh in at about 1.7 MB and 1.2 MB, respectively. H2 Database has a nice sample gallery and web start demo.