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I encountered the exact same problem with bar chart. The thing is that I used rotation method such that it messed up the label position. To vertical bar chart with label bottom up, I repositioned label as following: CategoryAxis xAxis = this.plot.getDomainAxis(); this.plot.getDomainAxis().setCategor...

Thanks for the hint. I figured it out finally. The Plot can have more than one secondary dataset and renderer. Regards, Hongbing Hi, have you tried void setSecondaryDataset(int index, XYDataset dataset) Adds or changes a secondary dataset for the plot. through wich you can provide multiple datasets?

I've been working on a project using TaskSeriesCollection to draw Gantt chart and found a bug in the implementation. It could not return the correct value to getStartValue() and getEndValue() in case there are some holes in the gantt chart. (A category doesn't have all series.) Here is the revised c...

The new jfreechart doesn't support overlaid plot anymore. I checked out the demo and found that the overlaid demo is just another version of dual axis demo. I don't agree with the announcement that overlaid plot is redundant since the dual axis is supported. Overlaid can support more than two datase...