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Combined Category Plot Example using JFreeChart
Posted on: September 1, 2008 at 12:00 AM

This Example shows you how to create a Combined Category Plot chart using JFreeChart. Code for the chart shows runs of two team in a match.

Combined Category Plot Example using JFreeChart

This Example shows you how to create a Combined Category Plot chart using JFreeChart. Code for the chart shows runs of two team in a match.

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.

The method 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.

addValue(): This method is used for add data into DefaultCategoryDataset class object according to the category.

JFreeChart: JFreeChart class object is used to create new chart according CategoryPlot class object

setBackgroundPaint(): This method is used to set the paint used to fill the chart background.

CombinedCategoryPlot.java


import java.awt.Font;



import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.CategoryAxis;

import org.jfree.chart.axis.NumberAxis;

import org.jfree.chart.labels.StandardCategoryToolTipGenerator;

import org.jfree.chart.plot.CategoryPlot;

import org.jfree.chart.plot.CombinedDomainCategoryPlot;

import org.jfree.chart.renderer.category.BarRenderer;

import org.jfree.data.category.CategoryDataset;

import org.jfree.data.category.DefaultCategoryDataset;

import org.jfree.ui.ApplicationFrame;

import org.jfree.ui.RefineryUtilities;



public class CombinedCategoryPlot extends ApplicationFrame {



  public CombinedCategoryPlot(String titel) {

  super(titel);





  final JFreeChart chart = createChart();

  final ChartPanel chartPanel = new ChartPanel(chart);

  chartPanel.setPreferredSize(

  new java.awt.Dimension(600, 350));

  setContentPane(chartPanel);

  }



  public CategoryDataset createDatasetTeam1() {



  final DefaultCategoryDataset result = 

   new DefaultCategoryDataset();



  double[] run = 

  new double[]{5, 4, 3, 6, 7, 8, 3, 6, 3, 6,};



  for (int i = 0; i < run.length; i++) {

  result.addValue(run[i], "Team 1", "" + (i + 1));

  }

  return result;

  }



  public CategoryDataset createDatasetTeam2() {



  final DefaultCategoryDataset result 

   = new DefaultCategoryDataset();



  double[] run = new double[]{3, 2, 2, 6, 8, 4, 1, 8, 9, 11};



  for (int i = 0; i < run.length; i++) {

  result.addValue(run[i], "Team 2", "" + (i + 1));

  }

  return result;

  }



  private JFreeChart createChart() {



  final CategoryDataset dataset1 = createDatasetTeam1();

  final NumberAxis rangeAxis1 = 

  new NumberAxis("Run");

  rangeAxis1.setStandardTickUnits(

   NumberAxis.createIntegerTickUnits());

  final BarRenderer renderer1 = new BarRenderer();

  renderer1.setBaseToolTipGenerator(

  new StandardCategoryToolTipGenerator());

  final CategoryPlot subplot1 = 

   new CategoryPlot(dataset1, null, rangeAxis1, 

  renderer1);

  subplot1.setDomainGridlinesVisible(true);





  final CategoryDataset dataset2 = createDatasetTeam2();

  final NumberAxis rangeAxis2 = 

   new NumberAxis("Run");

  rangeAxis2.setStandardTickUnits(

   NumberAxis.createIntegerTickUnits());

  final BarRenderer renderer2 = 

  new BarRenderer();

  renderer2.setBaseToolTipGenerator(

  new StandardCategoryToolTipGenerator());

  final CategoryPlot subplot2 = 

  new CategoryPlot(dataset2, null, rangeAxis2, 

  renderer2);

  subplot2.setDomainGridlinesVisible(true);







  final CategoryAxis domainAxis = new CategoryAxis("Over");

  final CombinedDomainCategoryPlot plot = new 

CombinedDomainCategoryPlot(domainAxis);

plot.add(subplot1, 1); plot.add(subplot2, 1); final JFreeChart chart = new JFreeChart( "Score Bord", new Font("SansSerif", Font.BOLD, 12), plot, true); return chart; } public static void main(final String[] args) { final String title = "Combined Category Plot Demo"; final CombinedCategoryPlot demo = new CombinedCategoryPlot(title); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }

Output:

Download code

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