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.] * * -------------------------- * IntervalBarChartDemo1.java * -------------------------- * (C) Copyright 2002-2004, by Jeremy Bowman and Contributors. * * Original Author: Jeremy Bowman. * Contributor(s): David Gilbert (for Object Refinery Limited); * * $Id: IntervalBarChartDemo1.java,v 1.16 2004/05/10 16:45:23 mungady Exp $ * * Changes * ------- * 29-Apr-2002 : Version 1, contributed by Jeremy Bowman. Name changed to * IntervalBarChartDemo, and the chart is displayed in a frame rather than * saved to a file (DG); * 25-Jun-2002 : Removed unnecessary imports (DG); * 10-Oct-2002 : Fixed errors reported by Checkstyle (DG); * */ package org.jfree.chart.demo; import java.awt.Color; import java.awt.Font; import java.text.DecimalFormat; import org.jfree.chart.ChartFrame; 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.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.IntervalBarRenderer; import org.jfree.data.category.DefaultIntervalCategoryDataset; import org.jfree.ui.TextAnchor; /** * An interval bar chart. * * @author Jeremy Bowman */ public class IntervalBarChartDemo1 { /** The categories. */ private static final String[] CATEGORIES = { "1", "3", "5", "10", "20" }; /** The label font. */ private static Font labelFont = null; /** The title font. */ private static Font titleFont = null; /** The chart. */ private JFreeChart chart = null; static { labelFont = new Font("Helvetica", Font.PLAIN, 10); titleFont = new Font("Helvetica", Font.BOLD, 14); } /** * Creates a new demo. */ public IntervalBarChartDemo1() { DefaultIntervalCategoryDataset data = null; final double[][] lows = { { -.0315, .0159, .0306, .0453, .0557 } }; final double[][] highs = { { .1931, .1457, .1310, .1163, .1059 } }; data = new DefaultIntervalCategoryDataset(lows, highs); data.setCategoryKeys(CATEGORIES); final String title = "Strategie Sicherheit"; final String xTitle = "Zeitraum (in Jahren)"; final String yTitle = "Performance"; final CategoryAxis xAxis = new CategoryAxis(xTitle); xAxis.setLabelFont(titleFont); xAxis.setTickLabelFont(labelFont); xAxis.setTickMarksVisible(false); final NumberAxis yAxis = new NumberAxis(yTitle); yAxis.setLabelFont(titleFont); yAxis.setTickLabelFont(labelFont); yAxis.setRange(-0.2, 0.40); final DecimalFormat formatter = new DecimalFormat("0.##%"); yAxis.setTickUnit(new NumberTickUnit(0.05, formatter)); final IntervalBarRenderer renderer = new IntervalBarRenderer(); renderer.setSeriesPaint(0, new Color(51, 102, 153)); // renderer.setLabelGenerator(new IntervalCategoryLabelGenerator()); renderer.setItemLabelsVisible(true); renderer.setItemLabelPaint(Color.white); final ItemLabelPosition p = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER); renderer.setPositiveItemLabelPosition(p); final CategoryPlot plot = new CategoryPlot(data, xAxis, yAxis, renderer); plot.setBackgroundPaint(Color.lightGray); plot.setOutlinePaint(Color.white); plot.setOrientation(PlotOrientation.VERTICAL); this.chart = new JFreeChart(title, titleFont, plot, false); this.chart.setBackgroundPaint(Color.white); } // **************************************************************************** // * 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. * * @return the chart. */ public JFreeChart getChart() { return this.chart; } /** * Starting point for the demo. * * @param args ignored. */ public static void main(final String[] args) { final IntervalBarChartDemo1 sample = new IntervalBarChartDemo1(); final JFreeChart chart = sample.getChart(); final ChartFrame frame = new ChartFrame("Interval Bar Chart Demo", chart); frame.pack(); frame.setVisible(true); } }