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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.

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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

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Category Step Chart Example using JFreeChart

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