How can I create a Pie charts ?
HI all,
I'm a beginner in java and i'm investigate in a web project (website) which should display statistical charts. I did a beans to generate basic bar charts, but it is most difficult to build a Pie chart. That's why i need help to put me on the rigth way to build Pie Charts beans (this pie charts should be filled up with db query).
Every kind of help will be appreciated.
Thanks in advance
Hope someone can help me.
STF
I take it you constructed the bar graphs using html and images together?
Obviously it's a little more difficult to make a pie chart with html. Chances are that it will have to be an image rendered by a Servlet or JSP. I suggest looking at how to create images using AWT or swing. This will allow you to create a circle with different color slices and what not. Then you need a Servlet or JSP that will send the image out the output stream. You can then place an image tag in your html page like this <img src="http://myserver.com/PieChartServlet>
I'm actually working on an API myself that will render pretty histograms (line graphs), and hopefully pie charts down the road. It's going to be an open source project. I decided to make my own API when I looked at some others out there who were charging an arm and a leg for theirs. Chart Builder for example, it's like $6K for their java based API <choke>.
So if you're interested, or anyone else is, shoot me an email and I'll let you know when the beta is ready. Derek.Wichmann@oracle.com
-Derek">
Hi LearningSTF,
I hope these links will help you out.
1) http://www.objectplanet.com/EasyCharts/
2)http://www.quadbase.com/espresschart/screenshot.html#colordialog
Regards,
TirumalaRao,
Developer Technical Support,
Sun Microsystems,India.
