JFreeChart : Pie charts

A pie chart is a specialized circular graph used in statistics, it is divided into slices to illustrate numerical proportion.

Simple way to create Pie Charts

You can create a Pie chart by using ChatFactory class. ChatFactory class provides following factory methods to create Pie chart.

public static JFreeChart createPieChart(String title, PieDataset dataset);

public static JFreeChart createPieChart(String title, PieDataset dataset,
   boolean legend, boolean tooltips, Locale locale);

public static JFreeChart createPieChart(String title, PieDataset dataset,
   boolean legend, boolean tooltips, boolean urls);

public static JFreeChart createPieChart(String title, PieDataset dataset,
   PieDataset previousDataset, int percentDiffForMaxScale,
   boolean greenForIncrease, boolean legend, boolean tooltips,
   Locale locale, boolean subTitle, boolean showDifference);


public static JFreeChart createPieChart(String title, PieDataset dataset,
   PieDataset previousDataset, int percentDiffForMaxScale,
   boolean greenForIncrease, boolean legend, boolean tooltips,
   boolean urls, boolean subTitle, boolean showDifference);

Parameter details

Parameter	Description
title	Specifies chart title
dataset	Input for the chart.
legend	Boolean flag specifies whether a legend is required or not.
tooltips	If tooltips set to true, then tooltips are enabled on chart, else not.
locale	Specifies the locale
previousDataSet	The dataset for the last run, this will be used to compare each key in the dataset
percentDiffForMaxScale	Integer value, goes from bright red/green to black, percentDiffForMaxScale indicate the change required to reach top scale.
subtitle	If set to true, then it displays a sub title with color scheme
showDifference	create a new dataset that will show the % difference between the two datasets.
urls	Configure chart to generate URLs

Example1

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;

public class Main {
 public static void main(String args[]) {
  /* Create dataset */
  DefaultPieDataset dataset = new DefaultPieDataset();
  dataset.setValue("2004-2005", 58);
  dataset.setValue("2005-2006", 41);
  dataset.setValue("2006-2007", 85.3);
  dataset.setValue("2007-2008", 81);

  /* create chart */
  JFreeChart chart = ChartFactory.createPieChart("Simple Piechart",
    dataset);

  /* create and display chart on frame */
  ChartFrame frame = new ChartFrame("First", chart);
  frame.pack();
  frame.setVisible(true);
 }
}

By default, legend and tooltip are enabled for this constructor.

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