Partition pie chart into equal parts jfreechart

Question

I have a data source in which there are three departments and each department has equal employees that are 8. I want to make a pie chart using jFreeChart such that first we partition the pie into 3 equal parts for departments that is 120' for each department. Then in these partitions I want to show the sales of each employee. How can I do this in jFreeChart.

score 2 · Answer 1 · edited May 23 '17 at 11:50

2

PieChartDemo1 is a good starting point; focus on createDataset(); the full source is included in the distribution.

Addendum: How to further create partitions?

Ah, you want to sub-divide each 120° partition. DefaultPieDataset doesn't support a hierarchical structure directly, but you can use color in the PiePlot to highlight the grouping. Create related colors using Color.getHSBColor(), as shown here, and use setSectionPaint() to apply the colors accordingly.

edited May 23 '17 at 11:50

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answered Jun 27 '13 at 09:27

trashgod

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Its simple to create partitions but how to further create partitions in that? Thanks. – wali Jun 27 '13 at 09:58
I've suggested one approach above. – trashgod Jun 27 '13 at 11:26

score 2 · Accepted Answer · answered Jun 27 '13 at 09:28

public class PieChart extends JFrame {  

  private  PieDataset createDataset() {
            DefaultPieDataset result = new DefaultPieDataset();
            result.setValue("department1", 33.33);
            result.setValue("department2", 33.33);
            result.setValue("department3", 33.33);
            return result;

        }

     private JFreeChart createChart(PieDataset dataset, String title) {

            JFreeChart chart = ChartFactory.createPieChart3D(title,          // chart title
                dataset,                // data
                true,                   // include legend
                true,
                false);

            PiePlot3D plot = (PiePlot3D) chart.getPlot();
            plot.setStartAngle(290);
            plot.setDirection(Rotation.CLOCKWISE);
            plot.setForegroundAlpha(0.5f);
            return chart;

        }

}

public static void main(String[] args) {
          PieChart demo = new PieChart("Comparison", "Which operating system are you using?");
          demo.pack();
          demo.setVisible(true);
      }

Its simple to create partitions but how to further create partitions in that? Thanks. — wali, Jun 27 '13 at 10:09
make paratition accordingly means pie chart usefull to partition so when you assigning any student then your 100% will be 33.33 as per department partition assign value below 33.33 and if you want to assign each 8 student equal then 33.33/8 — shreyansh jogi, Jun 27 '13 at 10:09

Partition pie chart into equal parts jfreechart

2 Answers2