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Create a polar chart using JFreeChart

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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(600600));
  setContentPane(chartPanel);
  }

  private XYDataset createDataset() {
  final XYSeriesCollection data = new XYSeriesCollection();
  XYSeries series = new XYSeries("Average Size");
  series.add(4540.0);
  series.add(135.045.0);
  series.add(270.040.0);
  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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Posted on: September 3, 2008

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