Home Chartgraphs Category Step Chart Example using JFreeChart

 
 

Share on Google+Share on Google+

Category Step Chart Example using JFreeChart

Advertisement
This Example shows you how to create a category step chart using JFreeChart. Code of the chart shows you run rate at different over in a match.

Category Step Chart Example using JFreeChart

     

This Example shows you how to create a category step chart using JFreeChart. Code of the chart shows you run rate at different over 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.

createCategoryDataset(): This method is used for create data set 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.

CategoryStepChart .java

import java.awt.Color;
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.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.renderer.category.CategoryStepRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class CategoryStepChart extends ApplicationFrame {

  public CategoryStepChart(String tietel) {
  super(tietel);

  final CategoryDataset dataset = createDataset();
  final JFreeChart chart = createChart(dataset);
  final ChartPanel chartPanel = new ChartPanel(chart);
  chartPanel.setPreferredSize(
  
new java.awt.Dimension(600350));
  setContentPane(chartPanel);
  }

  private CategoryDataset createDataset() {

  double[][] run = new double[][]{
  {54367836312},
  {92268408911}
  };

  double[][] runRate = new double[2][10];
  float team1run = 0;
  float team2run = 0;
  for (int i = 0; i < run[0].length; i++) {
  
  team1run += run[0][i];
  team2run += run[1][i];

  runRate[0][i= team1run / (i+1);
  runRate[1][i= team2run / (i+1);
  }
  return DatasetUtilities.createCategoryDataset(
  "Team "
"", runRate);
  }

  private JFreeChart createChart(CategoryDataset dataset) {

  final CategoryItemRenderer renderer = 
 
new CategoryStepRenderer(true);
  final CategoryAxis domainAxis = 
 
new CategoryAxis("Over");
  final ValueAxis rangeAxis = new NumberAxis("Run Rate");
  final CategoryPlot plot = 
  new 
CategoryPlot(dataset, domainAxis, 
    rangeAxis, renderer
);
  final JFreeChart chart = 
  new 
JFreeChart("Score Bord", plot);

  chart.setBackgroundPaint(new Color(249231236));
  return chart;

  }

  public static void main(String args[]) {
  CategoryStepChart chart = 
  new 
CategoryStepChart("Candle Stick Chart");
  chart.pack();
  RefineryUtilities.centerFrameOnScreen(chart);
  chart.setVisible(true);
  }
}

Output:



Download code
Advertisements

If you enjoyed this post then why not add us on Google+? Add us to your Circles



Liked it!  Share this Tutorial


Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Posted on: September 1, 2008

Related Tutorials

Discuss: Category Step Chart Example using JFreeChart  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:0
DMCA.com