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Create charts using Java code

Please let me know if there are any APIs that allow creation of charts (bar graphs / histograms / pie charts, etc) through Java code. At this point of time, I am not particular about the output format - Excel file / Matlab file / R (Stats language) etc. But, it would be great if something exists for Excel.

The important thing is that I must be able to create a chart through Java code only, and there must not be a requirement for predefined external templates as is the case with jxls.

Thanks!

JFreeChart

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JFreeChart is the most popular in this area and mkaes very good charts

ASKER

Thanks!

Are there any APIs for Excel?

Looka at it, I can post the whole PDF manual if you want.

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There was a lot of questions just toadya bout it in this zone

http://jxls.sourceforge.net/

ASKER

With jxls, we need to create a template.
POI doesnt seem to support charts.

http://poi.apache.org/ - this is not so for graphs but for read/write MS docs, xls

ASKER

Right. Do we have something for graphs in Excel?
If possible, please post the link to the manual for JFreeChart.

JXLS is for graphs in Excel created by Java

ASKER

Right. But, the problem with jxls is that it requires a template file. I want to do everything from Java without having to create templates first.

Type JXLS in the serach here on EE and maybe limit to the latest days - you'll see soem traikls
This is the manual
jfreechart-1.0.13-A4.pdf

But you can wriote templet in Java with POI first (tjhough it seesm too much work to me - better do them once and use them)

ASKER

That's a nice idea!

Well, I'm glad you like it - id you need to create them all the time different on the fly, then maybe it is a way

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Think you'll find you can't create templates in POI

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ASKER

@CEHJ:
Could you give me the exact link to the API and some tutorials / examples?

Thanks!