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.] * * ------------------------- * LayeredBarChartDemo1.java * ------------------------- * (C) Copyright 2003, 2004, by Arnaud Lelievre and Contributors. * * Original Author: Arnaud Lelievre (for Garden); * Contributor(s): David Gilbert (for Object Refinery Limited); * * $Id: LayeredBarChartDemo1.java,v 1.10 2004/04/26 19:11:55 taqua Exp $ * * Changes * ------- * 28-Aug-2003 : Version 1 (AL); * 11-Nov-2003 : Minor changes (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.LayeredBarRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.general.DatasetUtilities; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A simple demonstration application showing how to create a superimposed horizontal bar chart. * * @author Arnaud Lelievre */ public class LayeredBarChartDemo1 extends ApplicationFrame { /** * Creates a new demo instance. * * @param title the frame title. */ public LayeredBarChartDemo1(final String title) { super(title); final CategoryDataset dataset = createDataset(); final JFreeChart chart = createChart(dataset); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); 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. * // **************************************************************************** /** * Returns a sample dataset. * * @return a sample dataset. */ private CategoryDataset createDataset() { // create a dataset... final double[][] data = new double[][] { { 41.0, 33.0, 22.0, 64.0, 42.0, 62.0, 22.0, 14.0 }, { 55.0, 63.0, 55.0, 48.0, 54.0, 37.0, 41.0, 39.0 }, { 57.0, 75.0, 43.0, 33.0, 63.0, 46.0, 57.0, 33.0 } }; return DatasetUtilities.createCategoryDataset("Series ", "Factor ", data); } /** * Creates a chart for the specified dataset. * * @param dataset the dataset. * * @return a chart. */ private JFreeChart createChart(final CategoryDataset dataset) { final CategoryAxis categoryAxis = new CategoryAxis("Category"); //categoryAxis.setMaxCategoryLabelWidthRatio(10.0f); final ValueAxis valueAxis = new NumberAxis("Score (%)"); final CategoryPlot plot = new CategoryPlot(dataset, categoryAxis, valueAxis, new LayeredBarRenderer()); plot.setOrientation(PlotOrientation.HORIZONTAL); final JFreeChart chart = new JFreeChart("Layered Bar Chart", JFreeChart.DEFAULT_TITLE_FONT, plot, true); // set the background color for the chart... chart.setBackgroundPaint(Color.lightGray); final LayeredBarRenderer renderer = (LayeredBarRenderer) plot.getRenderer(); // we can set each series bar width individually or let the renderer manage a standard view. // the width is set in percentage, where 1.0 is the maximum (100%). renderer.setSeriesBarWidth(0, 1.0); renderer.setSeriesBarWidth(1, 0.7); renderer.setSeriesBarWidth(2, 0.4); renderer.setItemMargin(0.01); final CategoryAxis domainAxis = plot.getDomainAxis(); domainAxis.setCategoryMargin(0.25); domainAxis.setUpperMargin(0.05); domainAxis.setLowerMargin(0.05); return chart; } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final LayeredBarChartDemo1 demo = new LayeredBarChartDemo1("Layered Bar Chart Demo 1"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }