How to dynamically update HistogramDataset with two series in jfreechart?

问题

I want to dynamically update two separate series in a jfree chart histogram. When i look at HistogramDataset it doesn't seem like there is a method for that. Is this possible? I know it can be done in SimpleHistogramDataset but I need to have two series on this chart.

回答1:

Some alternatives:

1. Replace the HistogramDataset with each update:

   chart.getXYPlot().setDataset(newDataset);
   

2. Add a second SimpleHistogramDataset and XYItemRenderer to the plot:

   SimpleHistogramDataset newDataset = createDataset();
   chart.getXYPlot().setDataset(1, newDataset);
   XYItemRenderer renderer = new XYBarRenderer();
   renderer.setBasePaint(Color.blue);
   chart.getXYPlot().setRenderer(1, renderer);
   

3. Create a custom AbstractIntervalXYDataset that supports mutation.

来源：https://stackoverflow.com/questions/44688808/how-to-dynamically-update-histogramdataset-with-two-series-in-jfreechart