Java/Chart/Bar Stacked Chart

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Chart2D: Bar Chart With Stack

Chart: Stack Bar Chart

JCharts: Stacked Bar Chart

JFreeChart: Stacked Bar Chart Demo 1

   <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.]
*
* -------------------------
* StackedBarChartDemo1.java
* -------------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: StackedBarChartDemo1.java,v 1.11 2004/04/26 19:12:03 taqua Exp $
*
* Changes
* -------
* 06-Nov-2002 : Version 1 (DG);
* 13-May-2003 : Renamed StackedVerticalBarChartDemo --> StackedBarChartDemo1 (DG);
*
*/

package org.jfree.chart.demo; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PlotOrientation; import org.jfree.data.category.CategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A simple demonstration application showing how to create a stacked bar chart
* using data from a {@link CategoryDataset}.
*
*/

public class StackedBarChartDemo1 extends ApplicationFrame {

   /**
    * Creates a new demo.
    *
    * @param title  the frame title.
    */
   public StackedBarChartDemo1(final String title) {
       super(title);
       final CategoryDataset dataset = createDataset();
       final JFreeChart chart = createChart(dataset);
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       setContentPane(chartPanel);
   }
   
   /**
    * Creates a sample dataset.
    * 
    * @return a sample dataset.
    */
   private CategoryDataset createDataset() {
       return DemoDatasetFactory.createCategoryDataset();
   }
   
   /**
    * Creates a sample chart.
    * 
    * @param dataset  the dataset for the chart.
    * 
    * @return a sample chart.
    */
   private JFreeChart createChart(final CategoryDataset dataset) {
       final JFreeChart chart = ChartFactory.createStackedBarChart(
           "Stacked Bar Chart Demo 1",  // chart title
           "Category",                  // domain axis label
           "Value",                     // range axis label
           dataset,                     // data
           PlotOrientation.VERTICAL,    // the plot orientation
           true,                        // legend
           true,                        // tooltips
           false                        // urls
       );
       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 StackedBarChartDemo1 demo = new StackedBarChartDemo1("Stacked Bar Chart Demo 1");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>
   
  
 
  



JFreeChart: Stacked Bar Chart 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.]
*
* -------------------------
* StackedBarChartDemo2.java
* -------------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: StackedBarChartDemo2.java,v 1.11 2004/04/26 19:12:03 taqua Exp $
*
* Changes
* -------
* 07-Nov-2002 : Version 1 (DG);
* 13-May-2003 : Renamed StackedHorizontalBarChartDemo --> StackedBarChartDemo2 (DG);
*
*/

package org.jfree.chart.demo; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.StackedBarRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A simple demonstration application showing how to create a stacked bar chart
* using data from a {@link CategoryDataset}.  This demo also has item labels displayed.
*
*/

public class StackedBarChartDemo2 extends ApplicationFrame {

   /**
    * Creates a new demo.
    *
    * @param title  the frame title.
    */
   public StackedBarChartDemo2(final String title) {
       super(title);
       
       final CategoryDataset dataset = createDataset();
       final JFreeChart chart = createChart(dataset);
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       setContentPane(chartPanel);
   }
   
   /**
    * Creates a sample dataset.
    * 
    * @return a sample dataset.
    */
   private CategoryDataset createDataset() {
       return DemoDatasetFactory.createCategoryDataset();
   }
   
   /**
    * Creates a sample chart.
    * 
    * @param dataset  the dataset.
    * 
    * @return a sample chart.
    */
   private JFreeChart createChart(final CategoryDataset dataset) {
       
       final JFreeChart chart = ChartFactory.createStackedBarChart(
           "Stacked Bar Chart Demo 2",
           "Category",                  // domain axis label
           "Value",                     // range axis label
           dataset,                     // data
           PlotOrientation.HORIZONTAL,  // the plot orientation
           true,                        // include legend
           true,                        // tooltips
           false                        // urls
       );
       final CategoryPlot plot = (CategoryPlot) chart.getPlot();
       final StackedBarRenderer renderer = (StackedBarRenderer) plot.getRenderer();
       renderer.setItemLabelsVisible(true);
       
       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 StackedBarChartDemo2 demo = new StackedBarChartDemo2("Stacked Bar Chart Demo 2");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>
   
  
 
  



JFreeChart: Stacked Bar Chart Demo 3

   <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.]
*
* -------------------------
* StackedBarChartDemo3.java
* -------------------------
* (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: StackedBarChartDemo3.java,v 1.9 2004/05/10 16:45:23 mungady Exp $
*
* Changes
* -------
* 27-Nov-2003 : Version 1 (DG);
*
*/

package org.jfree.chart.demo; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.labels.StandardCategoryToolTipGenerator; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.CategoryItemRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /**

* A simple demonstration application showing how to create a stacked bar chart
* using data from a {@link CategoryDataset}.
*
*/

public class StackedBarChartDemo3 extends ApplicationFrame {

   /**
    * Creates a new demo.
    *
    * @param title  the frame title.
    */
   public StackedBarChartDemo3(final String title) {
       super(title);
       final CategoryDataset dataset = createDataset();
       final JFreeChart chart = createChart(dataset);
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
       setContentPane(chartPanel);
   }
   
   /**
    * Creates a sample dataset.
    * 
    * @return a sample dataset.
    */
   private CategoryDataset createDataset() {
       return DemoDatasetFactory.createCategoryDataset();
   }
   
   /**
    * Creates a sample chart.
    * 
    * @param dataset  the dataset for the chart.
    * 
    * @return a sample chart.
    */
   private JFreeChart createChart(final CategoryDataset dataset) {
       final JFreeChart chart = ChartFactory.createStackedBarChart(
           "Stacked Bar Chart Demo 3",  // chart title
           "Category",                  // domain axis label
           "Value",                     // range axis label
           dataset,                     // data
           PlotOrientation.VERTICAL,    // the plot orientation
           true,                        // legend
           false,                       // tooltips
           false                        // urls
       );
       final CategoryPlot plot = chart.getCategoryPlot();

// final CategoryItemRenderer renderer = new ExtendedStackedBarRenderer();

 //      renderer.setToolTipGenerator(new StandardCategoryToolTipGenerator());
   //    plot.setRenderer(renderer);
       
       final ValueAxis rangeAxis = plot.getRangeAxis();
       rangeAxis.setLowerMargin(0.15);
       rangeAxis.setUpperMargin(0.15);
       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 StackedBarChartDemo3 demo = new StackedBarChartDemo3("Stacked Bar Chart Demo 3");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>
   
  
 
  



JFreeChart: Stacked Bar Chart Demo 4

   <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.]
*
* -------------------------
* StackedBarChartDemo4.java
* -------------------------
* (C) Copyright 2004, by Object Refinery Limited and Contributors.
*
* Original Author:  David Gilbert (for Object Refinery Limited);
* Contributor(s):   -;
*
* $Id: StackedBarChartDemo4.java,v 1.6 2004/05/12 16:01:58 mungady Exp $
*
* Changes
* -------
* 29-Apr-2004 : Version 1 (DG);
*
*/

package org.jfree.chart.demo; import java.awt.Color; import java.awt.GradientPaint; import java.awt.Paint; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.LegendItem; import org.jfree.chart.LegendItemCollection; import org.jfree.chart.axis.SubCategoryAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.GroupedStackedBarRenderer; import org.jfree.data.KeyToGroupMap; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.GradientPaintTransformType; import org.jfree.ui.RefineryUtilities; import org.jfree.ui.StandardGradientPaintTransformer; /**

* A simple demonstration application showing how to create a stacked bar chart
* using data from a {@link CategoryDataset}.
*/

public class StackedBarChartDemo4 extends ApplicationFrame {

   /**
    * Creates a new demo.
    *
    * @param title  the frame title.
    */
   public StackedBarChartDemo4(final String title) {
       super(title);
       final CategoryDataset dataset = createDataset();
       final JFreeChart chart = createChart(dataset);
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setPreferredSize(new java.awt.Dimension(590, 350));
       setContentPane(chartPanel);
   }
   
   /**
    * Creates a sample dataset.
    * 
    * @return A sample dataset.
    */
   private CategoryDataset createDataset() {
       DefaultCategoryDataset result = new DefaultCategoryDataset();
       result.addValue(20.3, "Product 1 (US)", "Jan 04");
       result.addValue(27.2, "Product 1 (US)", "Feb 04");
       result.addValue(19.7, "Product 1 (US)", "Mar 04");
       result.addValue(19.4, "Product 1 (Europe)", "Jan 04");
       result.addValue(10.9, "Product 1 (Europe)", "Feb 04");
       result.addValue(18.4, "Product 1 (Europe)", "Mar 04");
       result.addValue(16.5, "Product 1 (Asia)", "Jan 04");
       result.addValue(15.9, "Product 1 (Asia)", "Feb 04");
       result.addValue(16.1, "Product 1 (Asia)", "Mar 04");
       result.addValue(13.2, "Product 1 (Middle East)", "Jan 04");
       result.addValue(14.4, "Product 1 (Middle East)", "Feb 04");
       result.addValue(13.7, "Product 1 (Middle East)", "Mar 04");
       result.addValue(23.3, "Product 2 (US)", "Jan 04");
       result.addValue(16.2, "Product 2 (US)", "Feb 04");
       result.addValue(28.7, "Product 2 (US)", "Mar 04");
       result.addValue(12.7, "Product 2 (Europe)", "Jan 04");
       result.addValue(17.9, "Product 2 (Europe)", "Feb 04");
       result.addValue(12.6, "Product 2 (Europe)", "Mar 04");
       result.addValue(15.4, "Product 2 (Asia)", "Jan 04");
       result.addValue(21.0, "Product 2 (Asia)", "Feb 04");
       result.addValue(11.1, "Product 2 (Asia)", "Mar 04");
       result.addValue(23.8, "Product 2 (Middle East)", "Jan 04");
       result.addValue(23.4, "Product 2 (Middle East)", "Feb 04");
       result.addValue(19.3, "Product 2 (Middle East)", "Mar 04");
       result.addValue(11.9, "Product 3 (US)", "Jan 04");
       result.addValue(31.0, "Product 3 (US)", "Feb 04");
       result.addValue(22.7, "Product 3 (US)", "Mar 04");
       result.addValue(15.3, "Product 3 (Europe)", "Jan 04");
       result.addValue(14.4, "Product 3 (Europe)", "Feb 04");
       result.addValue(25.3, "Product 3 (Europe)", "Mar 04");
       result.addValue(23.9, "Product 3 (Asia)", "Jan 04");
       result.addValue(19.0, "Product 3 (Asia)", "Feb 04");
       result.addValue(10.1, "Product 3 (Asia)", "Mar 04");
       result.addValue(13.2, "Product 3 (Middle East)", "Jan 04");
       result.addValue(15.5, "Product 3 (Middle East)", "Feb 04");
       result.addValue(10.1, "Product 3 (Middle East)", "Mar 04");
       
       return result;
   }
   
   /**
    * Creates a sample chart.
    * 
    * @param dataset  the dataset for the chart.
    * 
    * @return A sample chart.
    */
   private JFreeChart createChart(final CategoryDataset dataset) {
       final JFreeChart chart = ChartFactory.createStackedBarChart(
           "Stacked Bar Chart Demo 4",  // chart title
           "Category",                  // domain axis label
           "Value",                     // range axis label
           dataset,                     // data
           PlotOrientation.VERTICAL,    // the plot orientation
           true,                        // legend
           true,                        // tooltips
           false                        // urls
       );
       
       GroupedStackedBarRenderer renderer = new GroupedStackedBarRenderer();
       KeyToGroupMap map = new KeyToGroupMap("G1");
       map.mapKeyToGroup("Product 1 (US)", "G1");
       map.mapKeyToGroup("Product 1 (Europe)", "G1");
       map.mapKeyToGroup("Product 1 (Asia)", "G1");
       map.mapKeyToGroup("Product 1 (Middle East)", "G1");
       map.mapKeyToGroup("Product 2 (US)", "G2");
       map.mapKeyToGroup("Product 2 (Europe)", "G2");
       map.mapKeyToGroup("Product 2 (Asia)", "G2");
       map.mapKeyToGroup("Product 2 (Middle East)", "G2");
       map.mapKeyToGroup("Product 3 (US)", "G3");
       map.mapKeyToGroup("Product 3 (Europe)", "G3");
       map.mapKeyToGroup("Product 3 (Asia)", "G3");
       map.mapKeyToGroup("Product 3 (Middle East)", "G3");
       renderer.setSeriesToGroupMap(map); 
       
       renderer.setItemMargin(0.0);
       Paint p1 = new GradientPaint(
           0.0f, 0.0f, new Color(0x22, 0x22, 0xFF), 0.0f, 0.0f, new Color(0x88, 0x88, 0xFF)
       );
       renderer.setSeriesPaint(0, p1);
       renderer.setSeriesPaint(4, p1);
       renderer.setSeriesPaint(8, p1);
        
       Paint p2 = new GradientPaint(
           0.0f, 0.0f, new Color(0x22, 0xFF, 0x22), 0.0f, 0.0f, new Color(0x88, 0xFF, 0x88)
       );
       renderer.setSeriesPaint(1, p2); 
       renderer.setSeriesPaint(5, p2); 
       renderer.setSeriesPaint(9, p2); 
       
       Paint p3 = new GradientPaint(
           0.0f, 0.0f, new Color(0xFF, 0x22, 0x22), 0.0f, 0.0f, new Color(0xFF, 0x88, 0x88)
       );
       renderer.setSeriesPaint(2, p3);
       renderer.setSeriesPaint(6, p3);
       renderer.setSeriesPaint(10, p3);
           
       Paint p4 = new GradientPaint(
           0.0f, 0.0f, new Color(0xFF, 0xFF, 0x22), 0.0f, 0.0f, new Color(0xFF, 0xFF, 0x88)
       );
       renderer.setSeriesPaint(3, p4);
       renderer.setSeriesPaint(7, p4);
       renderer.setSeriesPaint(11, p4);
       renderer.setGradientPaintTransformer(
           new StandardGradientPaintTransformer(GradientPaintTransformType.HORIZONTAL)
       );
       
       SubCategoryAxis domainAxis = new SubCategoryAxis("Product / Month");
       domainAxis.setCategoryMargin(0.05);
       domainAxis.addSubCategory("Product 1");
       domainAxis.addSubCategory("Product 2");
       domainAxis.addSubCategory("Product 3");
       
       CategoryPlot plot = (CategoryPlot) chart.getPlot();
       plot.setDomainAxis(domainAxis);
       //plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
       plot.setRenderer(renderer);
       plot.setFixedLegendItems(createLegendItems());
       return chart;
       
   }
   /**
    * Creates the legend items for the chart.  In this case, we set them manually because we
    * only want legend items for a subset of the data series.
    * 
    * @return The legend items.
    */
   private LegendItemCollection createLegendItems() {
       LegendItemCollection result = new LegendItemCollection();

// LegendItem item1 = new LegendItem("US", new Color(0x22, 0x22, 0xFF));

 //      LegendItem item2 = new LegendItem("Europe", new Color(0x22, 0xFF, 0x22));
   //    LegendItem item3 = new LegendItem("Asia", new Color(0xFF, 0x22, 0x22));
     //  LegendItem item4 = new LegendItem("Middle East", new Color(0xFF, 0xFF, 0x22));

// result.add(item1);

 //      result.add(item2);
   //    result.add(item3);
     //  result.add(item4);
       return result;
   }
   
   // ****************************************************************************
   // * 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 StackedBarChartDemo4 demo = new StackedBarChartDemo4("Stacked Bar Chart Demo 4");
       demo.pack();
       RefineryUtilities.centerFrameOnScreen(demo);
       demo.setVisible(true);
   }

}

      </source>