i reproduced the error with jfreechart-1.0.14. it seems to be a bug in chartcomposite in version 1.0.14.


you can use the libraries of jfreechart-1.0.13. i have tested it with the code in your question, and it works.

there is also an entry in the jfreechart bug tracker.


there is a fix for this within patch 3506228. the fix will be included in the upcoming 1.0.15 release.

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