Pretty pie charts in JFreechart

Question

Is it possible to get complex, beautiful colors for pie charts in JFreechart? I mean how can I achieve the colors like the image shown in the link?

Is it possible using the RGB format, or do you need to use a different format? How can we do it. thank you for your help

Answer 1

You can specify the color using RGB values for each slice of the pie with PiePlot.setSectionPaint.

Here is an example :

  DefaultPieDataset result = new DefaultPieDataset();
  result.setValue("1", 40.);
  result.setValue("2", 30.);
  result.setValue("3", 20.);
  result.setValue("4", 10.);
  JFreeChart chart = ChartFactory.createPieChart3D("", result, true, true, false);
  PiePlot3D plot = (PiePlot3D) chart.getPlot();
  plot.setBackgroundPaint(new Color(255, 255, 255, 0));
  plot.setSectionPaint("1", new Color(31, 73, 125));
  plot.setSectionPaint("2", new Color(192, 80, 77));
  plot.setSectionPaint("3", new Color(155, 187, 89));
  plot.setSectionPaint("4", new Color(128, 100, 162));

Answer 2

You can use setDrawingSupplier() to supply a custom palette, as shown here, or override lookupSectionPaint() to return any desired Paint, as shown here for getItemPaint().

You'd have to experiment with the outline stroke to approximate the highlight.