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Box And Whisker Chart Example using JFreeChart

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This Example shows you how to create a box and whisker chart using JFreeChart. Code of the chart given below shows product value at different date .

Box And Whisker Chart Example using JFreeChart

     

This Example shows you how to create a box and whisker chart using JFreeChart. Code of the chart given below shows product value at different date .

In the code given below we have extended class ApplicationFrame to create a frame and also pass a string value to the constructor of ApplicationFrame class by using super keyword that will be name of the created frame.

Methods used in this example are described below:

pack(): This method invokes the layout manager.

centerFrameOnScreen(): This method is used for the position of the frame in the middle of the screen.

setVisible(): This method is used for display frame on the screen.

add(): This method is used for added data into DefaultBoxAndWhiskerXYDataset class object.

createBoxAndWhiskerChart(): This method is used to create box and whisker chart for given values. It takes title, domain axisa label, range axis label, dataset and legend as parameters.

BoxAndWhiskerChart.java

import java.awt.*;

import java.util.List;
import java.util.ArrayList;
import java.util.Date;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.statistics.BoxAndWhiskerCalculator;
import org.jfree.data.statistics.BoxAndWhiskerXYDataset;
import org.jfree.data.statistics.DefaultBoxAndWhiskerXYDataset;
import org.jfree.date.DateUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class BoxAndWhiskerChart extends ApplicationFrame {

  public BoxAndWhiskerChart(String titel) {
  super(titel);

  final BoxAndWhiskerXYDataset dataset = createDataset();
  final JFreeChart chart = createChart(dataset);

  final ChartPanel chartPanel = new ChartPanel(chart);
  chartPanel.setPreferredSize(new java.awt.Dimension(500300));
  setContentPane(chartPanel);

  }

  private BoxAndWhiskerXYDataset createDataset() {
  final int ENTITY_COUNT = 14;

  DefaultBoxAndWhiskerXYDataset dataset = new 
DefaultBoxAndWhiskerXYDataset
("Test");


  for (int i = 0; i < ENTITY_COUNT; i++) {
 Date date = DateUtilities.createDate(20037, i + 1120);
  List values = new ArrayList();
  for (int j = 0; j < 10; j++) {
  values.add(new Double(10.0 + Math.random() 10.0));
  values.add(new Double(13.0 + Math.random() 4.0));
  }
  dataset.add(date, 
 BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics
(values));
  }
  return dataset;
  }

  private JFreeChart createChart(
   final 
BoxAndWhiskerXYDataset dataset) {
  JFreeChart chart = ChartFactory.createBoxAndWhiskerChart(
  "Box and Whisker Chart""Time""Value", dataset, true);
  chart.setBackgroundPaint(new Color(249231236));

  return chart;
  }

  public static void main(final String[] args) {

  final BoxAndWhiskerChart demo = new BoxAndWhiskerChart("");
  demo.pack();
  RefineryUtilities.centerFrameOnScreen(demo);
  demo.setVisible(true);
  }
}


Output:



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Posted on: September 1, 2008

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