Pie Chart

In this section we are providing you an example to create a Pie Chart.

Description of Example

For creating a Pie Chart we use PieDataset. In this example, for creating a PieDataset we are using DefaultPieDataset class. Then we add some data in this dataset that will show in chart.

Description of Code

        DefaultPieDataset pieDataset = new DefaultPieDataset();
For defining a dataset for a pie chart we have to create an object of DefaultPieDataSet type :

        setValue(“one”, new Integer(10));
After creating the instance of dataset then we have to add the data in the data set by invoking the method setValue(). Like

        JFreeChart chart = ChartFactory.createPieChart("Pie Chart using JFreeChart", pieDataset true, true, true);
After added the data in dataset we create the Pie Chart by invoking the createPieChart() method. This method is a static method of ChartFactory class and its returns the object of JFreeChart type. This method syntax is:
        Public static JFreeChart createPieChart(java.lang.String title, pieDataset dataset, boolean legend, boolean tooltips, boolean urls);

ChartFrame frame1=new ChartFrame("Pie Chart",chart);
After this we create the object of ChartFrame. It used to display a chart.

Here is code of the program :


import java.awt.*;

import org.jfree.chart.*;

import org.jfree.chart.title.*;

import org.jfree.data.general.DefaultPieDataset;

import org.jfree.ui.*;



public class pie{

public static void main(String arg[]){

  DefaultPieDataset pieDataset = new DefaultPieDataset();

  pieDataset.setValue("One", new Integer(10));

  pieDataset.setValue("Two", new Integer(20));

  pieDataset.setValue("Three", new Integer(30));

  pieDataset.setValue("Four", new Integer(10));

  pieDataset.setValue("Five", new Integer(20));

  pieDataset.setValue("Six", new Integer(10));

  JFreeChart chart = ChartFactory.createPieChart

   ("Pie Chart using JFreeChart", pieDataset, true,true,true);



  ChartFrame frame1=new ChartFrame("Pie Chart",chart);

  frame1.setVisible(true);

  frame1.setSize(300,300);

  }

}

Output of the Program :

Download this example

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