xybarchartdemo.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.]
 *
 * -------------------
 * XYBarChartDemo.java
 * -------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: XYBarChartDemo.java,v 1.11 2004/05/11 14:56:17 mungady Exp $
 *
 * Changes
 * -------
 * 20-Jun-2002 : Version 1 (DG);
 * 02-Jul-2002 : Removed unnecessary imports (DG);
 * 24-Aug-2002 : Set preferred size for ChartPanel (DG);
 * 11-Oct-2002 : Fixed issues reported by Checkstyle (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;
import java.awt.GradientPaint;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickMarkPosition;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.XYItemRenderer;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A simple demonstration application showing how to create a vertical bar chart.
 *
 */
public class XYBarChartDemo extends ApplicationFrame {

    /**
     * Constructs the demo application.
     *
     * @param title  the frame title.
     */
    public XYBarChartDemo(final String title) {

        super(title);

        final TimeSeriesCollection data = DemoDatasetFactory.createTimeSeriesCollection1();
        data.setDomainIsPointsInTime(false);
        final JFreeChart chart = ChartFactory.createXYBarChart(
            title,
            "X",
            true,
            "Y",
            data,
            PlotOrientation.VERTICAL,
            true,
            false,
            false
        );

        // then customise it a little...
        chart.setBackgroundPaint(new GradientPaint(0, 0, Color.white, 1000, 0, Color.blue));

        final XYItemRenderer renderer = chart.getXYPlot().getRenderer();
        final StandardXYToolTipGenerator generator = new StandardXYToolTipGenerator(
            "{1} = {2}", new SimpleDateFormat("yyyy"), new DecimalFormat("0.00")
        );
        renderer.setToolTipGenerator(generator);

        final XYPlot plot = chart.getXYPlot();
        final DateAxis axis = (DateAxis) plot.getDomainAxis();
        axis.setTickMarkPosition(DateTickMarkPosition.MIDDLE);
        
        // add the chart to a panel...
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 300));
        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.             *
    // ****************************************************************************
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {

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

    }

}