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.] * * ---------------------- * MovingAverageDemo.java * ---------------------- * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: MovingAverageDemo.java,v 1.14 2004/04/30 08:11:18 mungady Exp $ * * Changes * ------- * 28-Jan-2003 : Version 1 (DG); * */ package org.jfree.chart.demo; 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.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.time.Month; import org.jfree.data.time.MovingAverage; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * An example showing the calculation of a moving average for a time series. * */ public class MovingAverageDemo extends ApplicationFrame { /** * A moving average demo. * * @param title the frame title. */ public MovingAverageDemo(final String title) { super(title); // create a title... final String chartTitle = "Legal & General Unit Trust Prices"; final XYDataset dataset = createDataset(); final JFreeChart chart = ChartFactory.createTimeSeriesChart(chartTitle, "Date", "Price Per Unit", dataset, true, true, false); // final StandardLegend legend = (StandardLegend) chart.getLegend(); // legend.setDisplaySeriesShapes(true); final XYPlot plot = chart.getXYPlot(); final XYItemRenderer renderer = plot.getRenderer(); if (renderer instanceof StandardXYItemRenderer) { final StandardXYItemRenderer rr = (StandardXYItemRenderer) renderer; rr.setPlotShapes(true); rr.setShapesFilled(true); } final DateAxis axis = (DateAxis) plot.getDomainAxis(); axis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy")); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); setContentPane(chartPanel); } /** * Creates a dataset, one series containing unit trust prices, the other a moving average. * * @return the dataset. */ public XYDataset createDataset() { final TimeSeries s1 = new TimeSeries("L&G European Index Trust", Month.class); s1.add(new Month(2, 2001), 181.8); s1.add(new Month(3, 2001), 167.3); s1.add(new Month(4, 2001), 153.8); s1.add(new Month(5, 2001), 167.6); s1.add(new Month(6, 2001), 158.8); s1.add(new Month(7, 2001), 148.3); s1.add(new Month(8, 2001), 153.9); s1.add(new Month(9, 2001), 142.7); s1.add(new Month(10, 2001), 123.2); s1.add(new Month(11, 2001), 131.8); s1.add(new Month(12, 2001), 139.6); s1.add(new Month(1, 2002), 142.9); s1.add(new Month(2, 2002), 138.7); s1.add(new Month(3, 2002), 137.3); s1.add(new Month(4, 2002), 143.9); s1.add(new Month(5, 2002), 139.8); s1.add(new Month(6, 2002), 137.0); s1.add(new Month(7, 2002), 132.8); // **************************************************************************** // * 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. * // **************************************************************************** final TimeSeries s2 = MovingAverage.createMovingAverage(s1, "Six Month Moving Average", 6, 0); final TimeSeriesCollection dataset = new TimeSeriesCollection(); dataset.addSeries(s1); dataset.addSeries(s2); return dataset; } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final MovingAverageDemo demo = new MovingAverageDemo("Moving Average Demo 1"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }