Hello,
I've java.lang.NullPointerException when I want to copy a TimeTableXYDataset item of series to another TimeTableXYDataset.
TimeTableXYDataset SourceXYDataset = null;
TimeTableXYDataset TargetXYDataset = null;
int item = 0;
int series = 0;
..... I set SourceXYDataset data from a database.
TargetXYDataset.add(SourceXYDataset.getTimePeriod(item), SourceXYDataset.getYValue(series, item), SourceXYDataset.getSeriesKey(series));