Jfreechart - can we set a datapoint form to a StackedAreaChart?

I am using Jfreechart to create an area chart. I am using StackedXYAreaChart class.

I wanted to know if we can draw shapes on data points for a StackedAreaChart (this is a line chart that we can label with each data point by setting SetSeriesShapes ()).

SetSeriesShape () method doesn't work. Anyone have an idea?

Here is what I have tried so far (please do not comment that I have an empty dataset. I am drawing a dynamic graph and the series will be filled in later):

 incomingData = new TimeTableXYDataset();
final JFreeChart incomingDataChart = ChartFactory.createStackedXYAreaChart(
            "Chart", "Time", "Payload (In Bytes)", incomingData, PlotOrientation.VERTICAL, true, true, false);
    final StackedXYAreaRenderer renderChart = new StackedXYAreaRenderer();
    renderChart.setSeriesPaint(0, Color.decode("#339900"));
    renderChart.setSeriesPaint(1, Color.decode("#CC9933"));
    renderChart.setSeriesPaint(2, Color.decode("#33CCFF"));
    renderChart.setSeriesPaint(3, Color.decode("#FF6600"));
    renderChart.setSeriesShape(0, new Ellipse2D.Double(-3, -3, 10, 10));
    renderChart.setSeriesShape(1, new Ellipse2D.Double(-3, -3, 10, 10));
    renderChart.setSeriesShape(2, new Ellipse2D.Double(-3, -3, 10, 10));
    renderChart.setSeriesShape(3, new Ellipse2D.Double(-3, -3, 10, 10));
    incomingDatachart.getPlot().setRenderer(renderChart);