I need sample codes for charting applet.

Hi techyv,
I need to sample codes for charting applet.
I am not that good at researching but I was told by my office group mates to research about charting applet.
We are going to create an applet design graphical user interface for our clients.
We are going to create a system that is related to a simple event organizer to be installed in Linux operating system.
I wish you can give me a solution for this problem.
Hoping for your help.
Thanks.
