populationchartdemo.java

JfreeChart 常用图表例子

/* ===========================================================
 * 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.]
 *
 * ------------------------
 * PopulationChartDemo.java
 * ------------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: PopulationChartDemo.java,v 1.14 2004/04/26 19:12:00 taqua Exp $
 *
 * Changes
 * -------
 * 23-Apr-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.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DefaultKeyedValues2DDataset;
import org.jfree.data.general.KeyedValues2DDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A population pyramid demo.
 *
 */
public class PopulationChartDemo extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public PopulationChartDemo(final String title) {

        super(title);
        final CategoryDataset dataset = createDataset();

        // create the chart...
        final JFreeChart chart = ChartFactory.createStackedBarChart(
            "Population Chart Demo",
            "Age Group",     // domain axis label
            "Population (millions)", // range axis label
            dataset,         // data
            PlotOrientation.HORIZONTAL,
            true,            // include legend
            true,            // tooltips
            false            // urls
        );

        // add the chart to a panel...
        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.com/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 dataset.
     * 
     * @return A dataset.
     */
    private KeyedValues2DDataset createDataset() {

        final DefaultKeyedValues2DDataset data = new DefaultKeyedValues2DDataset();
        data.addValue(-6.0, "Male", "70+");
        data.addValue(-8.0, "Male", "60-69");
        data.addValue(-11.0, "Male", "50-59");
        data.addValue(-13.0, "Male", "40-49");
        data.addValue(-14.0, "Male", "30-39");
        data.addValue(-15.0, "Male", "20-29");
        data.addValue(-19.0, "Male", "10-19");
        data.addValue(-21.0, "Male", "0-9");
        data.addValue(10.0, "Female", "70+");
        data.addValue(12.0, "Female", "60-69");
        data.addValue(13.0, "Female", "50-59");
        data.addValue(14.0, "Female", "40-49");
        data.addValue(15.0, "Female", "30-39");
        data.addValue(17.0, "Female", "20-29");
        data.addValue(19.0, "Female", "10-19");
        data.addValue(20.0, "Female", "0-9");
        return data;

    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {

        final PopulationChartDemo demo = new PopulationChartDemo("Population Chart Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}