Java tutorial
package cn.edu.thss.iise.bpmdemo.charts; /* =========================================================== * 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.] * * ------------------ * PieChartDemo4.java * ------------------ * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: PieChartDemo4.java,v 1.21 2004/06/03 15:05:10 mungady Exp $ * * Changes * ------- * 11-Feb-2003 : Version 1 (DG); * */ import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.text.NumberFormat; import javax.swing.JPanel; import javax.swing.JTable; import javax.swing.Timer; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.labels.StandardPieItemLabelGenerator; import org.jfree.chart.plot.PiePlot; import org.jfree.data.general.DefaultPieDataset; import org.jfree.data.general.PieDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; import org.jfree.util.Log; import org.jfree.util.PrintStreamLogTarget; /** * A simple demonstration application showing how to create a pie chart using * data from a {@link DefaultPieDataset}. This chart has a lot of labels and * rotates, so it is useful for testing the label distribution algorithm. */ public class PieChartDemo4 extends ApplicationFrame { /** * Default constructor. * * @param title * the frame title. */ public PieChartDemo4(final String title) { super(title); final PieDataset dataset = createDataset(14); // create the chart... final JFreeChart chart = ChartFactory.createPieChart("Pie Chart Demo 4", // chart title dataset, // dataset false, // include legend true, false); // set the background color for the chart... chart.setBackgroundPaint(new Color(222, 222, 255)); final PiePlot plot = (PiePlot) chart.getPlot(); plot.setBackgroundPaint(Color.white); plot.setCircular(true); plot.setLabelGenerator(new StandardPieItemLabelGenerator("{0} = {2}", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance())); plot.setNoDataMessage("No data available"); // add the chart to a panel... final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); // add table Object[][] data = { { "Kathy0", new Integer(0) }, { "Kathy1", new Integer(2) }, { "Kathy2", new Integer(5) }, { "Kathy3", new Integer(5) }, { "Kathy4", new Integer(5) }, { "Kathy5", new Integer(5) }, { "Kathy6", new Integer(5) }, { "Kathy7", new Integer(5) }, { "Kathy8", new Integer(5) }, { "Kathy9", new Integer(5) } }; String[] columnNames = { "Model Name", "Reuse Number" }; JTable table = new JTable(data, columnNames); final JPanel panel = new JPanel(); panel.add(chartPanel); panel.add(table); setContentPane(panel); final Rotator rotator = new Rotator(plot); rotator.start(); } /** * Creates a sample dataset. * * @param sections * the number of sections. * * @return A sample dataset. */ private PieDataset createDataset(final int sections) { final DefaultPieDataset result = new DefaultPieDataset(); for (int i = 0; i < sections; i++) { final double value = 100.0 * Math.random(); result.setValue("Section " + i, value); } return result; } // **************************************************************************** // * 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) { Log.getInstance().addTarget(new PrintStreamLogTarget()); final PieChartDemo4 demo = new PieChartDemo4("Pie Chart Demo 4"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } /** * The rotator. * */ static class Rotator extends Timer implements ActionListener { /** The plot. */ private PiePlot plot; /** The angle. */ private int angle = 270; /** * Constructor. * * @param plot * the plot. */ Rotator(final PiePlot plot) { super(100, null); this.plot = plot; addActionListener(this); } /** * Modifies the starting angle. * * @param event * the action event. */ public void actionPerformed(final ActionEvent event) { this.plot.setStartAngle(angle); this.angle = this.angle + 1; if (this.angle == 360) { this.angle = 0; } } } }