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.] * ----------------- * ChartTiming2.java * ----------------- * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * $Id: ChartTiming2.java,v 1.1 2011-01-31 09:01:52 klukas Exp $ * Changes * ------- * 29-Oct-2002 : Version 1 (DG); */ package org.jfree.chart.demo; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.Rectangle2D; import java.awt.image.BufferedImage; import javax.swing.Timer; import org.jfree.chart.ChartFactory; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.XYDotRenderer; import org.jfree.data.XYDataset; /** * Draws a scatter plot over and over for 10 seconds. Reports on how many redraws were achieved. * <p> * On my PC (SuSE Linux 8.2, JDK 1.4, 256mb RAM, 2.66ghz Pentium) I get 14 charts per second. */ public class ChartTiming2 implements ActionListener { /** A flag that indicates when time is up. */ private boolean finished; /** * Creates a new application. */ public ChartTiming2() { // nothing to do } /** * Runs the test. */ public void run() { this.finished = false; // create a dataset... final XYDataset data = new SampleXYDataset2(1, 1440); // create a scatter chart... final boolean withLegend = true; final JFreeChart chart = ChartFactory.createScatterPlot("Scatter plot timing", "X", "Y", data, PlotOrientation.VERTICAL, withLegend, false, false); final XYPlot plot = chart.getXYPlot(); plot.setRenderer(new XYDotRenderer()); final BufferedImage image = new BufferedImage(400, 300, BufferedImage.TYPE_INT_RGB); final Graphics2D g2 = image.createGraphics(); final Rectangle2D chartArea = new Rectangle2D.Double(0, 0, 400, 300); // set up the timer... final Timer timer = new Timer(10000, this); timer.setRepeats(false); int count = 0; timer.start(); while (!this.finished) { chart.draw(g2, chartArea, null, null); System.out.println("Charts drawn..." + count); if (!this.finished) { count++; } } System.out.println("DONE"); } /** * Receives notification of action events (in this case, from the Timer). * * @param event * the event. */ public void actionPerformed(final ActionEvent event) { this.finished = true; } /** * Starting point for the application. * * @param args * ignored. */ public static void main(final String[] args) { final ChartTiming2 app = new ChartTiming2(); app.run(); } }