statisticalbarchartdemo.java

这是一个segy数据显示程序

/* ===========================================================
 * 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.]
 *
 * ----------------------------
 * StatisticalBarChartDemo.java
 * ----------------------------
 * (C) Copyright 2002-2004, by Pascal Collet and Contributors.
 *
 * Original Author:  Pascal Collet;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: StatisticalBarChartDemo.java,v 1.15 2004/05/07 15:51:37 mungady Exp $
 *
 * Changes
 * -------
 * 21-Aug-2002 : Version 1, contributed by Pascal Collet (DG);
 * 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 05-Feb-2003 : Updated for documentation (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Font;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.CategoryItemRenderer;
import org.jfree.chart.renderer.StatisticalBarRenderer;
import org.jfree.data.statistics.DefaultStatisticalCategoryDataset;
import org.jfree.data.statistics.StatisticalCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * Demonstration of the statistical bar graph.
 *
 * @author Pascal Collet
 */
public class StatisticalBarChartDemo extends ApplicationFrame {

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

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

        final CategoryAxis xAxis = new CategoryAxis("Type");
        xAxis.setLowerMargin(0.01d); // percentage of space before first bar
        xAxis.setUpperMargin(0.01d); // percentage of space after last bar
        xAxis.setCategoryMargin(0.05d); // percentage of space between categories
        final ValueAxis yAxis = new NumberAxis("Value");

        // define the plot
        final CategoryItemRenderer renderer = new StatisticalBarRenderer();
        final CategoryPlot plot = new CategoryPlot(dataset, xAxis, yAxis, renderer);

        final JFreeChart chart = new JFreeChart("Statistical Bar Chart Demo",
                                          new Font("Helvetica", Font.BOLD, 14),
                                          plot,
                                          true);
        //chart.setBackgroundPaint(Color.white);
        // 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 sample dataset.
     *
     * @return The dataset.
     */
    private StatisticalCategoryDataset createDataset() {

        final DefaultStatisticalCategoryDataset result = new DefaultStatisticalCategoryDataset();

        result.add(32.5, 17.9, "Series 1", "Type 1");
        result.add(27.8, 11.4, "Series 1", "Type 2");
        result.add(29.3, 14.4, "Series 1", "Type 3");
        result.add(37.9, 10.3, "Series 1", "Type 4");

        result.add(22.9,  7.9, "Series 2", "Type 1");
        result.add(21.8, 18.4, "Series 2", "Type 2");
        result.add(19.3, 12.4, "Series 2", "Type 3");
        result.add(30.3, 20.7, "Series 2", "Type 4");

        result.add(12.5, 10.9, "Series 3", "Type 1");
        result.add(24.8,  7.4, "Series 3", "Type 2");
        result.add(19.3, 13.4, "Series 3", "Type 3");
        result.add(17.1, 10.6, "Series 3", "Type 4");

        return result;

    }

    /**
     * For testing from the command line.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {

        final StatisticalBarChartDemo demo = new StatisticalBarChartDemo(
            "Statistical Bar Chart Demo"
        );
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}