Java/Chart/Compass Chart

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JFreeChart: Compass Chart Sample

JFreeChart: Compass Demo

   <source lang="java">

/* ===========================================================

* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info:  http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------
* CompassDemo.java
* ----------------
* (C) Copyright 2002-2004, by the Australian Antarctic Division and Contributors.
*
* Original Author:  Bryan Scott (for the Australian Antarctic Division);
* Contributor(s):   David Gilbert (for Object Refinery Limited);
*
* $Id: CompassDemo.java,v 1.15 2004/04/26 19:11:53 taqua Exp $
*
* Changes
* -------
* 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
* 10-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 27-Mar-2003 : Changed dataset to ValueDataset (DG);
* 16-Mar-2004 : Fixed null data display issue (BRS);
*
*/

package org.jfree.chart.demo; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.GridLayout; import java.awt.Insets; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingConstants; import javax.swing.border.TitledBorder; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.rupassPlot; import org.jfree.data.general.DefaultValueDataset; import org.jfree.ui.Spinner; /**

* A demo application showing how to use the {@link CompassPlot} class.
*
* @author Bryan Scott
*/

public class CompassDemo extends JPanel {

   /** Whether to output messages to the console **/
   public static final boolean DEBUG = true;
   /** The available needle types. */
   public static final String[] NEEDLE_TYPES
       = {"Arrow", "Line", "Long", "Pin", "Plum", "Pointer", "Ship", "Wind", "Arrow"};
   /** Dataset 1. */
   private DefaultValueDataset compassData = new DefaultValueDataset(new Double(0.0));
   /** Dataset 2. */
   private DefaultValueDataset shipData = new DefaultValueDataset(new Double(0.0));
   /** The compass plot. */
   private CompassPlot compassPlot = new CompassPlot(this.rupassData);
   /** The chart. */
   private JFreeChart compassChart = new JFreeChart("Compass Test",
                                                    JFreeChart.DEFAULT_TITLE_FONT,
                                                    this.rupassPlot, false);
   /** The chart panel. */
   private ChartPanel panelCompass = new ChartPanel(this.rupassChart);
   /** A grid layout. */
   private GridLayout gridLayout1 = new GridLayout();
   /** A panel. */
   private JPanel panelCompassHolder = new JPanel();
   /** A border layout. */
   private BorderLayout borderLayout = new BorderLayout();
   /** A panel. */
   private JPanel jPanel12 = new JPanel();
   /** A checkbox. */
   private JCheckBox windNullCheckBox = new JCheckBox();
   /** A checkbox. */
   private JCheckBox shipNullCheckBox = new JCheckBox();
   // SpinnerNumberModel modelWind = new SpinnerNumberModel(0, -1, 361, 1);
   // SpinnerNumberModel modelShip = new SpinnerNumberModel(0, -1, 361, 1);
   // JSpinner spinWind = new JSpinner(modelWind);
   // JSpinner spinShip = new JSpinner(modelShip);
   /** The wind spinner control. */
   private Spinner spinWind = new Spinner(270);
   /** The ship spinner control. */
   private Spinner spinShip = new Spinner(45);
   /** A panel. */
   private JPanel jPanel1 = new JPanel();
   /** A combo box. */
   private JComboBox pick1Pointer = new JComboBox(NEEDLE_TYPES);
   /** A panel. */
   private JPanel jPanel2 = new JPanel();
   /** A combo box. */
   private JComboBox pick2Pointer = new JComboBox(NEEDLE_TYPES);
   /** A titled border. */
   private TitledBorder titledBorder1;
   /** A titled border. */
   private TitledBorder titledBorder2;
   /** A grid bag layout. */
   private GridBagLayout gridBagLayout1 = new GridBagLayout();
   /** A grid bag layout. */
   private GridBagLayout gridBagLayout2 = new GridBagLayout();
   /** A titled border. */
   private TitledBorder titledBorder3;
   /** A grid layout. */
   private GridLayout gridLayout2 = new GridLayout();
   /**
    * Default constructor.
    */
   public CompassDemo() {
       try {
           //this.rupassPlot.addData(this.rupassData);
           this.rupassPlot.addData(this.shipData);
           this.rupassPlot.setSeriesNeedle(0, 7);
           this.rupassPlot.setSeriesNeedle(1, 5);
           this.rupassPlot.setSeriesPaint(0, Color.blue);
           this.rupassPlot.setSeriesOutlinePaint(0, Color.blue);
           this.rupassPlot.setSeriesPaint(1, Color.red);
           this.rupassPlot.setSeriesOutlinePaint(1, Color.red);
           this.pick1Pointer.setSelectedIndex(7);
           this.pick2Pointer.setSelectedIndex(5);
           jbInit();
       }
       catch (Exception ex) {
           ex.printStackTrace();
       }
   }
   /**
    * Initialises the user interface.
    *
    * @throws Exception if there are any exceptions.
    */
   void jbInit() throws Exception {
       this.titledBorder1 = new TitledBorder("");
       this.titledBorder2 = new TitledBorder("");
       this.titledBorder3 = new TitledBorder("");
       setLayout(this.gridLayout1);
       this.panelCompassHolder.setLayout(this.borderLayout);
       this.windNullCheckBox.setHorizontalTextPosition(SwingConstants.LEADING);
       this.windNullCheckBox.setText("Null");
       this.windNullCheckBox.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(final ActionEvent e) {
               checkWindNullActionPerformed(e);
           }
       });
       this.shipNullCheckBox.setHorizontalTextPosition(SwingConstants.LEFT);
       this.shipNullCheckBox.setText("Null");
       this.shipNullCheckBox.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(final ActionEvent e) {
               checkShipNullActionPerformed(e);
           }
       });
       this.spinShip.addPropertyChangeListener(new PropertyChangeListener() {
           public void propertyChange(final PropertyChangeEvent evt) {
             if (DEBUG) {
               System.out.println("compassDemo:spinShipPropertyChange");
             }
             final Spinner spinner = (Spinner) evt.getSource();
             if (spinner.isEnabled()) {
               shipData.setValue(new Double(spinner.getValue()));
             }
           }
       });
       this.spinWind.addPropertyChangeListener(new PropertyChangeListener() {
           public void propertyChange(final PropertyChangeEvent evt) {
               if (DEBUG) {
                 System.out.println("compassDemo:spinWindPropertyChange");
               }  
               final Spinner spinner = (Spinner) evt.getSource();
               if (spinner.isEnabled()) {
                 compassData.setValue(new Double(spinner.getValue()));
               }
           }
       });
       this.jPanel12.setLayout(this.gridLayout2);
       this.jPanel2.setBorder(this.titledBorder1);
       this.jPanel2.setLayout(this.gridBagLayout2);
       this.jPanel1.setBorder(this.titledBorder2);
       this.jPanel1.setLayout(this.gridBagLayout1);
       this.titledBorder1.setTitle("Second Pointer");
       this.titledBorder2.setTitle("First Pointer");
       this.titledBorder3.setTitle("Plot Options");
       this.pick2Pointer.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(final ActionEvent e) {
               pick2PointerActionPerformed(e);
           }
       });
       this.pick1Pointer.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(final ActionEvent e) {
               pick1PointerActionPerformed(e);
           }
       });
       add(this.panelCompassHolder, null);
       this.panelCompassHolder.add(this.jPanel12, BorderLayout.SOUTH);
       this.jPanel12.add(this.jPanel1, null);
       this.jPanel1.add(this.pick1Pointer,
                   new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0,
                                          GridBagConstraints.CENTER,
                                          GridBagConstraints.HORIZONTAL,
                                          new Insets(0, 0, 0, 0),
                                          0, 0));
       this.jPanel1.add(this.windNullCheckBox,
                   new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
                                          GridBagConstraints.CENTER,
                                          GridBagConstraints.NONE,
                                          new Insets(0, 0, 0, 0),
                                          0, 0));
       this.jPanel1.add(this.spinWind,
                   new GridBagConstraints(2, 0, 1, 1, 1.0, 0.0,
                                          GridBagConstraints.CENTER,
                                          GridBagConstraints.BOTH,
                                          new Insets(0, 0, 0, 0),
                                          0, 0));
       this.jPanel12.add(this.jPanel2, null);
       this.jPanel2.add(this.pick2Pointer,
                   new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0,
                                          GridBagConstraints.CENTER,
                                          GridBagConstraints.HORIZONTAL,
                                          new Insets(0, 0, 0, 0),
                                          0, 0));
       this.jPanel2.add(this.shipNullCheckBox,
                   new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
                                          GridBagConstraints.CENTER,
                                          GridBagConstraints.NONE,
                                          new Insets(0, 0, 0, 0),
                                          0, 0));
       this.jPanel2.add(this.spinShip,
                   new GridBagConstraints(2, 0, 1, 1, 1.0, 0.0,
                   GridBagConstraints.CENTER,
                   GridBagConstraints.BOTH,
                   new Insets(0, 0, 0, 0),
                   0, 0));
       this.panelCompassHolder.add(this.panelCompass, BorderLayout.CENTER);
   }
   /**
    * Entry point for the demo application.
    *
    * @param args  ignored.
    */
   public static void main(final String[] args) {
       final CompassDemo panel = new CompassDemo();
       final JFrame frame = new JFrame();
       frame.getContentPane().setLayout(new BorderLayout(5, 5));
       frame.setDefaultCloseOperation(3);
       frame.setTitle("Compass Demo");
       frame.getContentPane().add(panel, BorderLayout.CENTER);
       frame.setSize(700, 400);
       final Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
       frame.setLocation((d.width - frame.getSize().width) / 2,
                         (d.height - frame.getSize().height) / 2);
       frame.setVisible(true);
   }
   // ****************************************************************************
   // * JFREECHART DEVELOPER GUIDE                                               *
   // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
   // * to purchase from Object Refinery Limited:                                *
   // *                                                                          *
   // * http://www.object-refinery.ru/jfreechart/guide.html                     *
   // *                                                                          *
   // * Sales are used to provide funding for the JFreeChart project - please    *
   // * support us so that we can continue developing free software.             *
   // ****************************************************************************
   /**
    * Updates the data.
    *
    * @param value  the value.
    */
   public void adjustData(final double value) {
       final Number val = this.rupassData.getValue();
       double newVal = value;
       if (val != null) {
           newVal += val.doubleValue();
       }
       if (newVal > 360) {
           newVal = 0;
       }
       if (newVal < 0) {
           newVal = 360;
       }
       this.rupassData.setValue(new Double(newVal));
   }
   /**
    * Handles an action event.
    *
    * @param e  the event.
    */
   void checkWindNullActionPerformed(final ActionEvent e) {
       if (CompassDemo.DEBUG) {
           System.out.println("CompassDemo:checkWindNull: " + this.windNullCheckBox.isSelected());
       }
       if (this.windNullCheckBox.isSelected()) {
           this.rupassData.setValue(null);
           this.spinWind.setEnabled(false);
       }
       else {
           //  compassData.setValue((new Double(((Integer)spinWind.getValue()).intValue())));
           this.rupassData.setValue(new Double(this.spinWind.getValue()));
           this.spinWind.setEnabled(true);
       }
       if (CompassDemo.DEBUG) {
         System.out.println("CompassDemo:checkWindNull: " + this.rupassData.getValue());
       }
         
   }
   /**
    * Handles an action event.
    *
    * @param e  the event.
    */
   void checkShipNullActionPerformed(final ActionEvent e) {
       if (CompassDemo.DEBUG) {
           System.out.println("CompassDemo:checkShipNull: " + this.shipNullCheckBox.isSelected());
       }
       if (this.shipNullCheckBox.isSelected()) {
           this.shipData.setValue(null);
           this.spinShip.setEnabled(false);
       }
       else {
          // shipData.setValue((new Double(((Integer)spinShip.getValue()).intValue())));
           this.shipData.setValue(new Double(this.spinShip.getValue()));
           this.spinShip.setEnabled(true);
       }
   }
   /**
    * Handles an action event.
    *
    * @param e  the event.
    */
   void pick2PointerActionPerformed(final ActionEvent e) {
     if (CompassDemo.DEBUG) {
       System.out.println("compassDemo:pick2PointActionPerformed " + e.getActionCommand() + ",");
     }
     this.rupassPlot.setSeriesNeedle(1, this.pick2Pointer.getSelectedIndex());
     this.rupassPlot.setSeriesPaint(1, Color.red);
     this.rupassPlot.setSeriesOutlinePaint(1, Color.red);
   }
   /**
    * Handles an action event.
    *
    * @param e  the event.
    */
   void pick1PointerActionPerformed(final ActionEvent e) {
       if (CompassDemo.DEBUG) {
         System.out.println("compassDemo:pick1PointActionPerformed " + e.getActionCommand() + ",");
       }
       
       this.rupassPlot.setSeriesNeedle(0, this.pick1Pointer.getSelectedIndex());
       this.rupassPlot.setSeriesPaint(0, Color.blue);
       this.rupassPlot.setSeriesOutlinePaint(0, Color.blue);
   }

}


      </source>
   
  
 
  



JFreeChart: Compass Demo 2

   <source lang="java">

/* ===========================================================

* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info:  http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
* in the United States and other countries.]
*
* -----------------
* CompassDemo2.java
* -----------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: CompassDemo2.java,v 1.7 2004/04/26 19:11:53 taqua Exp $
*
* Changes
* -------
* 04-Aug-2003 : Version 1 (DG);
*
*/

package org.jfree.chart.demo; import java.awt.Color; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.rupassPlot; import org.jfree.data.general.DefaultValueDataset; import org.jfree.data.general.ValueDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A simple demonstration application showing how to...
*
*/

public class CompassDemo2 extends ApplicationFrame {

   /**
    * Creates a new demo application.
    *
    * @param title  the frame title.
    */
   public CompassDemo2(final String title) {
       super(title);
       final ValueDataset dataset = new DefaultValueDataset(new Double(45.0));
       final JFreeChart chart = createChart(dataset);
       
       // add the chart to a panel...
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       chartPanel.setEnforceFileExtensions(false);
       setContentPane(chartPanel);
   }
   /**
    * Creates a chart.
    * 
    * @param dataset  the dataset.
    * 
    * @return The chart.
    */
   private JFreeChart createChart(final ValueDataset dataset) {
       
       final CompassPlot plot = new CompassPlot(dataset);
       plot.setSeriesNeedle(7);
       plot.setSeriesPaint(0, Color.red);
       plot.setSeriesOutlinePaint(0, Color.red);
       final JFreeChart chart = new JFreeChart(plot);
       return chart;
       
   }
   
   // ****************************************************************************
   // * JFREECHART DEVELOPER GUIDE                                               *
   // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
   // * to purchase from Object Refinery Limited:                                *
   // *                                                                          *
   // * http://www.object-refinery.ru/jfreechart/guide.html                     *
   // *                                                                          *
   // * Sales are used to provide funding for the JFreeChart project - please    * 
   // * support us so that we can continue developing free software.             *
   // ****************************************************************************
   
   /**
    * Starting point for the demonstration application.
    *
    * @param args  ignored.
    */
   public static void main(final String[] args) {
       final CompassDemo2 demo = new CompassDemo2("Compass Demo 2");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}


      </source>
   
  
 
  



JFreeChart: Compass Format Demo

   <source lang="java">

/* ===========================================================

* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info:  http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
* in the United States and other countries.]
*
* ----------------------
* CompassFormatDemo.java
* ----------------------
* (C) Copyright 2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: CompassFormatDemo.java,v 1.4 2004/04/27 14:53:09 mungady Exp $
*
* Changes
* -------
* 18-Feb-2004 : Version 1 (DG);
*
*/

package org.jfree.chart.demo; import java.awt.Color; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.rupassFormat; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.NumberTickUnit; import org.jfree.chart.axis.TickUnits; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYAreaRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.time.Minute; import org.jfree.data.time.RegularTimePeriod; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A demo of the {@link CompassFormat} class.
*
*/

public class CompassFormatDemo extends ApplicationFrame {

   /**
    * Creates a new demo instance.
    *
    * @param title  the frame title.
    */
   public CompassFormatDemo(final String title) {
       super(title);
       final JFreeChart chart = createChart();
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       setContentPane(chartPanel);
   }
   // ****************************************************************************
   // * JFREECHART DEVELOPER GUIDE                                               *
   // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
   // * to purchase from Object Refinery Limited:                                *
   // *                                                                          *
   // * http://www.object-refinery.ru/jfreechart/guide.html                     *
   // *                                                                          *
   // * Sales are used to provide funding for the JFreeChart project - please    * 
   // * support us so that we can continue developing free software.             *
   // ****************************************************************************
   
   /**
    * Creates a sample dataset.
    *
    * @param count  the item count.
    * 
    * @return the dataset.
    */
   private XYDataset createDirectionDataset(final int count) {
       final TimeSeriesCollection dataset = new TimeSeriesCollection();
       final TimeSeries s1 = new TimeSeries("Wind Direction", Minute.class);
       RegularTimePeriod start = new Minute();
       double direction = 180.0;
       for (int i = 0; i < count; i++) {
           s1.add(start, direction);
           start = start.next();
           direction = direction + (Math.random() - 0.5) * 15.0;
           if (direction < 0.0) {
               direction = direction + 360.0;
           }
           else if (direction > 360.0) {
               direction = direction - 360.0;
           }
       }
       dataset.addSeries(s1);
       return dataset;
   }
   /**
    * Creates a sample dataset.
    *
    * @param count  the item count.
    * 
    * @return the dataset.
    */
   private XYDataset createForceDataset(final int count) {
       final TimeSeriesCollection dataset = new TimeSeriesCollection();
       final TimeSeries s1 = new TimeSeries("Wind Force", Minute.class);
       RegularTimePeriod start = new Minute();
       double force = 3.0;
       for (int i = 0; i < count; i++) {
           s1.add(start, force);
           start = start.next();
           force = Math.max(0.5, force + (Math.random() - 0.5) * 0.5);
       }
       dataset.addSeries(s1);
       return dataset;
   }
   /**
    * Creates a sample chart.
    * 
    * @return a sample chart.
    */
   private JFreeChart createChart() {
       final XYDataset direction = createDirectionDataset(600);
       final JFreeChart chart = ChartFactory.createTimeSeriesChart(
           "Time", 
           "Date", 
           "Direction",
           direction,
           true,
           true,
           false
       );
       final XYPlot plot = chart.getXYPlot();
       plot.getDomainAxis().setLowerMargin(0.0);
       plot.getDomainAxis().setUpperMargin(0.0);
       
       // configure the range axis to display directions...
       final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
       rangeAxis.setAutoRangeIncludesZero(false);
       final TickUnits units = new TickUnits();
       units.add(new NumberTickUnit(180.0, new CompassFormat()));
       units.add(new NumberTickUnit(90.0, new CompassFormat()));
       units.add(new NumberTickUnit(45.0, new CompassFormat()));
       units.add(new NumberTickUnit(22.5, new CompassFormat()));
       rangeAxis.setStandardTickUnits(units);
       
       // add the wind force with a secondary dataset/renderer/axis
       plot.setRangeAxis(rangeAxis);
       final XYItemRenderer renderer2 = new XYAreaRenderer();
       final ValueAxis axis2 = new NumberAxis("Force");
       axis2.setRange(0.0, 12.0);
       renderer2.setSeriesPaint(0, new Color(0, 0, 255, 128));
       plot.setDataset(1, createForceDataset(600));
       plot.setRenderer(1, renderer2);
       plot.setRangeAxis(1, axis2);
       plot.mapDatasetToRangeAxis(1, 1);
       
       return chart;
   }
   /**
    * Starting point for the demonstration application.
    *
    * @param args  ignored.
    */
   public static void main(final String[] args) {
       final CompassFormatDemo demo = new CompassFormatDemo("Compass Format Demo");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>