Home Chartgraphs Create a polar chart using JFreeChart

Create a polar chart using JFreeChart
Posted on: September 3, 2008 at 12:00 AM

This Example shows you how to create a polar chart using JFreeChart. Code given below creates a simple polar chart for the given values.

Create a polar chart using JFreeChart

This Example shows you how to create a polar chart using JFreeChart. Code given below creates a simple polar chart for the given values. 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.

createCategoryDataset(): This method is used to create the instance of CategoryDataset Interface and that contains a copy of the data in an array.

createPolarChart(): This method is used to create bar chart for given values. It takes title, dataset, legend, tool tips and urls as parameters.

saveChartAsPNG(): This method is used to save chart in to png format.

PolarChart.java




import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.data.xy.XYDataset;

import org.jfree.data.xy.XYSeries;

import org.jfree.data.xy.XYSeriesCollection;

import org.jfree.ui.ApplicationFrame;

import org.jfree.ui.RefineryUtilities;



public class PolarChart extends ApplicationFrame {



  public PolarChart(String titel) {

  super(titel);



  XYDataset dataset = createDataset();

  JFreeChart chart = createChart(dataset);

  

  ChartPanel chartPanel = new ChartPanel(chart);

  chartPanel.setPreferredSize(new java.awt.Dimension(600, 600));

  setContentPane(chartPanel);

  }



  private XYDataset createDataset() {

  final XYSeriesCollection data = new XYSeriesCollection();

  XYSeries series = new XYSeries("Average Size");

  series.add(45, 40.0);

  series.add(135.0, 45.0);

  series.add(270.0, 40.0);

  data.addSeries(series);

  return data;

  }



  private JFreeChart createChart(XYDataset dataset) {

  JFreeChart chart = ChartFactory.createPolarChart(

  "Polar Chart", dataset, true, true, false

  ); 

  return chart;

  }



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

  PolarChart chart = new PolarChart("Polar Chart");

  chart.pack();

  RefineryUtilities.centerFrameOnScreen(chart);

  chart.setVisible(true);

  }

}

Output:

Download code

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