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.] * * ------------------ * BarChartDemo5.java * ------------------ * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: BarChartDemo5.java,v 1.10 2004/04/26 19:11:53 taqua Exp $ * * Changes * ------- * 11-Jun-2002 : Version 1 (DG); * 25-Jun-2002 : Removed unnecessary imports (DG); * 09-Oct-2002 : Added frame centering (DG); * 14-Nov-2002 : Renamed HorizontalBarChartDemo --> HorizontalBarChartDemo2 (DG); * 28-Nov-2003 : Renamed HorizontalBarChartDemo2 --> BarChartDemo5 (DG); * */ package j2se.jfreechart.barchart; import java.awt.Color; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; 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 horizontal bar chart. * */ public class BarChartDemo5 extends ApplicationFrame { /** * Creates a new demo instance. * * @param title the frame title. */ public BarChartDemo5(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); } /** * Creates a sample dataset. * * @return A sample dataset. */ private CategoryDataset createDataset() { final double[][] data = new double[][] { { 1.0, 43.0, 35.0, 58.0, 54.0, 77.0, 71.0, 89.0 }, { 54.0, 75.0, 63.0, 83.0, 43.0, 46.0, 27.0, 13.0 }, { 41.0, 33.0, 22.0, 34.0, 62.0, 32.0, 42.0, 34.0 } }; return DatasetUtilities.createCategoryDataset("Series ", "Factor ", data); } /** * Creates a chart. * * @param dataset the dataset. * * @return A chart. */ private JFreeChart createChart(final CategoryDataset dataset) { // create the chart... final JFreeChart chart = ChartFactory.createBarChart("Bar Chart", // chart title "Category", // domain axis label "Score (%)", // range axis label dataset, // data PlotOrientation.HORIZONTAL, // orientation true, // include legend true, false); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... chart.setBackgroundPaint(Color.lightGray); // get a reference to the plot for further customisation... final CategoryPlot plot = chart.getCategoryPlot(); plot.getRenderer().setSeriesPaint(0, new Color(0, 0, 255)); plot.getRenderer().setSeriesPaint(1, new Color(75, 75, 255)); plot.getRenderer().setSeriesPaint(2, new Color(150, 150, 255)); // change the auto tick unit selection to integer units only... final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setRange(0.0, 100.0); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); // NumberAxis hna = rangeAxis; // MarkerAxisBand band = new MarkerAxisBand(hna, 2.0, 2.0, 2.0, 2.0, // new Font("SansSerif", Font.PLAIN, 9)); // IntervalMarker m1 = new IntervalMarker(0.0, 33.0, "Low", Color.gray, // new BasicStroke(0.5f), Color.green, 0.75f); // IntervalMarker m2 = new IntervalMarker(33.0, 66.0, "Medium", Color.gray, // new BasicStroke(0.5f), Color.orange, 0.75f); // IntervalMarker m3 = new IntervalMarker(66.0, 100.0, "High", Color.gray, // new BasicStroke(0.5f), Color.red, 0.75f); // band.addMarker(m1); // band.addMarker(m2); // band.addMarker(m3); // hna.setMarkerBand(band); // OPTIONAL CUSTOMISATION COMPLETED. return chart; } // **************************************************************************** // * 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 BarChartDemo5 demo = new BarChartDemo5("Bar Chart Demo 5"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }