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.] * * ----------------------- * WaterfallChartDemo.java * ----------------------- * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: WaterfallChartDemo.java,v 1.14 2004/05/10 16:45:23 mungady Exp $ * * Changes * ------- * 21-Oct-2003 : Version 1 (DG); * 06-Nov-2003 : Modified to use ChartFactory (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import java.text.DecimalFormat; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberTickUnit; import org.jfree.chart.axis.TickUnits; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.BarRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; import org.jfree.ui.Spacer; /** * A sample waterfall chart. */ public class WaterfallChartDemo extends ApplicationFrame { /** * Creates a new WaterFall Chart demo. * * @param title the frame title. */ public WaterfallChartDemo(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)); chartPanel.setEnforceFileExtensions(false); setContentPane(chartPanel); } /** * Creates a sample dataset for the demo. * * @return A sample dataset. */ private CategoryDataset createDataset() { final DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(15.76, "Product 1", "Labour"); dataset.addValue(8.66, "Product 1", "Administration"); dataset.addValue(4.71, "Product 1", "Marketing"); dataset.addValue(3.51, "Product 1", "Distribution"); dataset.addValue(32.64, "Product 1", "Total Expense"); return dataset; } // **************************************************************************** // * 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 the chart. * * @param dataset the dataset. * * @return The chart. */ private JFreeChart createChart(final CategoryDataset dataset) { final JFreeChart chart = ChartFactory.createWaterfallChart("Product Cost Breakdown", "Expense Category", "Cost Per Unit", dataset, PlotOrientation.VERTICAL, true, true, false); chart.setBackgroundPaint(Color.white); final CategoryPlot plot = chart.getCategoryPlot(); plot.setBackgroundPaint(Color.lightGray); plot.setRangeGridlinePaint(Color.white); plot.setRangeGridlinesVisible(true); // plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0)); final ValueAxis rangeAxis = plot.getRangeAxis(); // create a custom tick unit collection... final DecimalFormat formatter = new DecimalFormat("##,###"); formatter.setNegativePrefix("("); formatter.setNegativeSuffix(")"); final TickUnits standardUnits = new TickUnits(); standardUnits.add(new NumberTickUnit(5, formatter)); standardUnits.add(new NumberTickUnit(10, formatter)); standardUnits.add(new NumberTickUnit(20, formatter)); standardUnits.add(new NumberTickUnit(50, formatter)); standardUnits.add(new NumberTickUnit(100, formatter)); standardUnits.add(new NumberTickUnit(200, formatter)); standardUnits.add(new NumberTickUnit(500, formatter)); standardUnits.add(new NumberTickUnit(1000, formatter)); standardUnits.add(new NumberTickUnit(2000, formatter)); standardUnits.add(new NumberTickUnit(5000, formatter)); rangeAxis.setStandardTickUnits(standardUnits); final BarRenderer renderer = (BarRenderer) plot.getRenderer(); renderer.setDrawBarOutline(false); final DecimalFormat labelFormatter = new DecimalFormat("$##,###.00"); labelFormatter.setNegativePrefix("("); labelFormatter.setNegativeSuffix(")"); // renderer.setLabelGenerator( // new StandardCategoryLabelGenerator("{2}", labelFormatter) // ); renderer.setItemLabelsVisible(true); return chart; } /** * Starting point for the demo. * * @param args ignored. */ public static void main(final String[] args) { final WaterfallChartDemo demo = new WaterfallChartDemo("Waterfall Chart Demo"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }