Java tutorial
/* =========================================================== * 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.] * * -------------------- * XYStepChartDemo.java * -------------------- * (C) Copyright 2002-2004, by Roger Studner and Contributors. * * Original Author: Roger Studner; * Contributor(s): David Gilbert (for Object Refinery Limited); * * $Id: XYStepChartDemo.java,v 1.13 2004/04/26 19:40:15 taqua Exp $ * * Changes * ------- * 13-May-2002 : Version 1, contributed by Roger Studner (DG); * 11-Oct-2002 : Moved create method to ChartFactory class, and fixed issues reported by * Checkstyle (DG); * */ package org.jfree.chart.demo; import java.awt.BasicStroke; import java.awt.Color; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartFrame; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.date.DateUtilities; import org.jfree.ui.RefineryUtilities; /** * A demonstration of the {@link org.jfree.chart.renderer.XYStepRenderer} class. * * @author Roger Studner */ public class XYStepChartDemo { /** A frame for displaying the chart. */ private ChartFrame frame = null; /** * Displays a sample chart in its own frame. */ private void displayChart() { if (this.frame == null) { // create a default chart based on some sample data... final String title = "LCACs in use at given time"; final String xAxisLabel = "Time"; final String yAxisLabel = "Number of Transports"; final XYDataset data = createStepXYDataset(); final JFreeChart chart = ChartFactory.createXYStepChart(title, xAxisLabel, yAxisLabel, data, PlotOrientation.VERTICAL, true, // legend true, // tooltips false // urls ); // then customise it a little... chart.setBackgroundPaint(new Color(216, 216, 216)); final XYPlot plot = chart.getXYPlot(); plot.getRenderer().setSeriesStroke(0, new BasicStroke(2.0f)); plot.getRenderer().setSeriesStroke(1, new BasicStroke(2.0f)); // and present it in a frame... this.frame = new ChartFrame("Plan Comparison", chart); this.frame.pack(); RefineryUtilities.positionFrameRandomly(this.frame); this.frame.setVisible(true); } else { this.frame.setVisible(true); this.frame.requestFocus(); } } /** * Creates and returns a sample dataset for the XY 'Step' chart. * * @return the sample dataset. */ public static XYDataset createStepXYDataset() { final int feb = 2; final XYSeries s1 = new XYSeries("Plan 1", false, true); s1.add(DateUtilities.createDate(2002, feb, 19, 8, 0).getTime(), 0); s1.add(DateUtilities.createDate(2002, feb, 19, 8, 1).getTime(), 2); s1.add(DateUtilities.createDate(2002, feb, 19, 9, 5).getTime(), 4); s1.add(DateUtilities.createDate(2002, feb, 19, 10, 6).getTime(), 4); s1.add(DateUtilities.createDate(2002, feb, 19, 11, 6).getTime(), 5); s1.add(DateUtilities.createDate(2002, feb, 19, 12, 6).getTime(), 3); s1.add(DateUtilities.createDate(2002, feb, 19, 13, 6).getTime(), 6); s1.add(DateUtilities.createDate(2002, feb, 19, 14, 6).getTime(), 6); s1.add(DateUtilities.createDate(2002, feb, 19, 15, 30).getTime(), 2); s1.add(DateUtilities.createDate(2002, feb, 19, 16, 7).getTime(), 0); final XYSeries s2 = new XYSeries("Plan 2"); s2.add(DateUtilities.createDate(2002, feb, 19, 8, 40).getTime(), 0); s2.add(DateUtilities.createDate(2002, feb, 19, 8, 45).getTime(), 1); s2.add(DateUtilities.createDate(2002, feb, 19, 9, 0).getTime(), 6); s2.add(DateUtilities.createDate(2002, feb, 19, 10, 6).getTime(), 2); s2.add(DateUtilities.createDate(2002, feb, 19, 10, 45).getTime(), 4); s2.add(DateUtilities.createDate(2002, feb, 19, 12, 0).getTime(), 7); s2.add(DateUtilities.createDate(2002, feb, 19, 13, 0).getTime(), 5); s2.add(DateUtilities.createDate(2002, feb, 19, 14, 6).getTime(), 4); s2.add(DateUtilities.createDate(2002, feb, 19, 15, 15).getTime(), 4); s2.add(DateUtilities.createDate(2002, feb, 19, 16, 0).getTime(), 0); final XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(s1); dataset.addSeries(s2); return dataset; } // **************************************************************************** // * 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. * // **************************************************************************** /** * The starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final XYStepChartDemo demo = new XYStepChartDemo(); demo.displayChart(); } }