StackedXYBarRenderer problem with XYSeries adding & remo

[sesar]

I use:
- DefaultTableXYDataset
- StackedXYBarRenderer
- XYPlot
- XYSeries

XYSeries method:
- clear() does not work properly (there still remain all Items with null values)
- add(x,y) does not work properly beacuse of:
Exception in thread "AWT-EventQueue-0" org.jfree.data.general.SeriesException: X-value already exists.
at org.jfree.data.xy.XYSeries.add(XYSeries.java:364)
at org.jfree.data.xy.XYSeries.add(XYSeries.java:325)
at org.jfree.data.xy.XYSeries.add(XYSeries.java:250)

Is it possible to update/add/remove XYSeries from my StackedXYBarRendered Chart ??

[RichardWest]

Is it possible to update/add/remove XYSeries from my StackedXYBarRendered Chart ??

XYSeries has an update(Number x, Number y) method. You could also use addOrUpdate(Number x, Number y) if you are not sure that a y-value has been specified for the given x-value. Note that both of these methods do not take null for arguments (see XYSeries JavaDoc for details).