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.] * * ------------------------ * WaterfallChartDemo2.java * ------------------------ * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: Darshan Shah; * Contributor(s): David Gilbert (for Object Refinery Limited); * * $Id: WaterfallChartDemo2.java,v 1.11 2004/05/10 16:45:23 mungady Exp $ * * Changes * ------- * 20-Oct-2003 : Version 1, based on code contributed by Darshan Shah (DG); * */ package org.jfree.chart.demo; import java.awt.BasicStroke; import java.awt.Color; import java.text.DecimalFormat; 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.NumberTickUnit; import org.jfree.chart.axis.TickUnits; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.ValueMarker; import org.jfree.chart.renderer.category.WaterfallBarRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.Layer; import org.jfree.ui.RefineryUtilities; /** * A sample waterfall chart. */ public class WaterfallChartDemo2 extends ApplicationFrame { /** * Creates a new WaterFall Chart demo. * * @param title the frame title. */ public WaterfallChartDemo2(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(-890.76, "S1", "PY OM"); dataset.addValue(-3021.51, "S1", "Vol CM"); dataset.addValue(-218.32, "S1", "Price"); dataset.addValue(221.75, "S1", "Mat Inf"); dataset.addValue(-1504.1, "S1", "Oth Inf"); dataset.addValue(7103.8, "S1", "VCP"); dataset.addValue(3503.3, "S1", "CM FX"); dataset.addValue(-6561.97, "S1", "Base"); dataset.addValue(-824.25, "S1", "OM"); return dataset; } /** * Returns the chart. * * @param dataset the dataset. * * @return The chart. */ private JFreeChart createChart(final CategoryDataset dataset) { final CategoryAxis xAxis = new CategoryAxis("Category"); final NumberAxis yAxis = new NumberAxis("$ in Thousands"); yAxis.setLowerMargin(0.10); yAxis.setUpperMargin(0.10); // create a custom tick unit collection... final DecimalFormat formatter = new DecimalFormat("##,###"); formatter.setNegativePrefix("("); formatter.setNegativeSuffix(")"); final TickUnits standardUnits = new TickUnits(); 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)); yAxis.setStandardTickUnits(standardUnits); // **************************************************************************** // * 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. * // **************************************************************************** final DecimalFormat labelFormatter = new DecimalFormat("##,###"); labelFormatter.setNegativePrefix("("); labelFormatter.setNegativeSuffix(")"); final WaterfallBarRenderer renderer = new WaterfallBarRenderer(); // renderer.setLabelGenerator( // new StandardCategoryLabelGenerator("{2}", labelFormatter) // ); renderer.setItemLabelsVisible(Boolean.TRUE); final CategoryPlot plot = new CategoryPlot(dataset, xAxis, yAxis, renderer); plot.setBackgroundPaint(Color.lightGray); plot.setRangeGridlinePaint(Color.white); plot.setRangeGridlinesVisible(true); final ValueMarker baseline = new ValueMarker(0.0); baseline.setPaint(Color.blue); baseline.setStroke(new BasicStroke(1.1f)); plot.addRangeMarker(baseline, Layer.FOREGROUND); final JFreeChart chart = new JFreeChart("OM WaterFall Chart", JFreeChart.DEFAULT_TITLE_FONT, plot, false); chart.setBackgroundPaint(Color.white); return chart; } /** * Starting point for the demo. * * @param args ignored. */ public static void main(final String[] args) { final WaterfallChartDemo2 demo = new WaterfallChartDemo2("Waterfall Chart Demo 2"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }