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.] * * -------------------- * TimeSeriesDemo4.java * -------------------- * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: TimeSeriesDemo4.java,v 1.13 2004/04/30 07:43:20 mungady Exp $ * * Changes * ------- * 08-Apr-2002 : Version 1 (DG); * 25-Jun-2002 : Removed unnecessary import (DG); * 28-Aug-2002 : Centered frame on screen (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import java.awt.Insets; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.Marker; import org.jfree.chart.plot.ValueMarker; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.time.Day; import org.jfree.data.time.Hour; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * An example of a time series chart using hourly data and including a null value. The plot * has an image set for the background, and a blue range marker is added to the plot. * */ public class TimeSeriesDemo4 extends ApplicationFrame { /** * A demonstration application showing a quarterly time series containing a null value. * * @param title the frame title. */ public TimeSeriesDemo4(final String title) { super(title); final TimeSeries series = new TimeSeries("Random Data", Hour.class); final Day today = new Day(); series.add(new Hour(1, today), 500.2); series.add(new Hour(2, today), 694.1); series.add(new Hour(3, today), 734.4); series.add(new Hour(4, today), 453.2); series.add(new Hour(7, today), 500.2); series.add(new Hour(8, today), null); series.add(new Hour(12, today), 734.4); series.add(new Hour(16, today), 453.2); final TimeSeriesCollection dataset = new TimeSeriesCollection(series); // create a title with Unicode characters (currency symbols in this case)... final String chartTitle = "\u20A2\u20A2\u20A3\u20A4\u20A5\u20A6\u20A7\u20A8\u20A9\u20AA"; final JFreeChart chart = ChartFactory.createTimeSeriesChart(chartTitle, "Time", "Value", dataset, true, true, false); final XYPlot plot = chart.getXYPlot(); // plot.setInsets(new Insets(0, 0, 0, 20)); final Marker marker = new ValueMarker(700.0); marker.setPaint(Color.blue); marker.setAlpha(0.8f); plot.addRangeMarker(marker); plot.setBackgroundPaint(null); plot.setBackgroundImage(JFreeChart.INFO.getLogo()); final XYItemRenderer renderer = plot.getRenderer(); if (renderer instanceof StandardXYItemRenderer) { final StandardXYItemRenderer r = (StandardXYItemRenderer) renderer; r.setPlotShapes(true); r.setShapesFilled(true); } final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); chartPanel.setMouseZoomable(true, false); 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 TimeSeriesDemo4 demo = new TimeSeriesDemo4("Time Series Demo 4"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }