Customize bar colors in XYJfree chart

Question

how to paint different bars in different colors, I tried to use renderer, here is my sample code:

    public IntervalXYDataset createDataset() throws Interrupted         


        

Answer 1

What you want to do is the following:

XYPlot plot = (XYPlot) chart.getPlot();
plot.getRenderer().setSeriesPaint(1, Color.yellow);

Replace 1 with the (zero-based) index of the bar whose color you would like to change.

Edit to respond to comment:

List<Color> myBarColors = .....

XYPlot plot = (XYPlot) chart.getPlot();
XYItemRenderer renderer = plot.getRenderer();

for (int i = 0; i < 40; i++) {
    renderer.setSeriesPaint(i, myBarColors.get(i));
}

Edit 2: Misunderstood OPs problem, new solution in comments.

Answer 2

The most flexible approach is to override the getItemPaint() method of AbstractRenderer in a custom XYBarRenderer, as shown here for XYLineAndShapeRenderer.

Answer 3

I found the answer Create two series, and then add how many ever bars you want and set color for each series. using setSeriesPaint