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.] * * ------------------- * LineChartDemo2.java * ------------------- * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: LineChartDemo2.java,v 1.18 2004/04/26 19:11:55 taqua Exp $ * * Changes * ------- * 08-Apr-2002 : Version 1 (DG); * 10-Nov-2003 : Added axis offsets and changed colors (DG); * */ package org.jfree.chart.demo; 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.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; import org.jfree.ui.Spacer; import org.jfree.ui.TextAnchor; /** * A simple demonstration application showing how to create a line chart using data from an * {@link XYDataset}. * */ public class LineChartDemo2 extends ApplicationFrame { /** * Creates a new demo. * * @param title the frame title. */ public LineChartDemo2(final String title) { super(title); final XYDataset 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 XYDataset createDataset() { final XYSeries series1 = new XYSeries("First"); series1.add(1.0, 1.0); series1.add(2.0, 4.0); series1.add(3.0, 3.0); series1.add(4.0, 5.0); series1.add(5.0, 5.0); series1.add(6.0, 7.0); series1.add(7.0, 7.0); series1.add(8.0, 8.0); final XYSeries series2 = new XYSeries("Second"); series2.add(1.0, 5.0); series2.add(2.0, 7.0); series2.add(3.0, 6.0); series2.add(4.0, 8.0); series2.add(5.0, 4.0); series2.add(6.0, 4.0); series2.add(7.0, 2.0); series2.add(8.0, 1.0); final XYSeries series3 = new XYSeries("Third"); series3.add(3.0, 4.0); series3.add(4.0, 3.0); series3.add(5.0, 2.0); series3.add(6.0, 3.0); series3.add(7.0, 6.0); series3.add(8.0, 3.0); series3.add(9.0, 4.0); series3.add(10.0, 3.0); final XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(series1); dataset.addSeries(series2); dataset.addSeries(series3); return dataset; } /** * Creates a chart. * * @param dataset the data for the chart. * * @return a chart. */ private JFreeChart createChart(final XYDataset dataset) { // create the chart... final JFreeChart chart = ChartFactory.createXYLineChart("Line Chart Demo 2", // chart title "X", // x axis label "Y", // y axis label dataset, // data PlotOrientation.HORIZONTAL, true, // include legend true, // tooltips false // urls ); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... chart.setBackgroundPaint(Color.white); // final StandardLegend legend = (StandardLegend) chart.getLegend(); // legend.setDisplaySeriesShapes(true); // get a reference to the plot for further customisation... final XYPlot plot = chart.getXYPlot(); plot.setBackgroundPaint(Color.lightGray); // plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0)); plot.setDomainGridlinePaint(Color.white); plot.setRangeGridlinePaint(Color.white); plot.setDomainCrosshairLockedOnData(true); plot.setDomainCrosshairVisible(true); plot.setRangeCrosshairLockedOnData(true); plot.setRangeCrosshairVisible(true); final StandardXYItemRenderer renderer = (StandardXYItemRenderer) plot.getRenderer(); renderer.setPlotShapes(true); renderer.setShapesFilled(true); renderer.setItemLabelsVisible(true); final ItemLabelPosition p = new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER, TextAnchor.CENTER, Math.PI / 4); renderer.setPositiveItemLabelPosition(p); // change the auto tick unit selection to integer units only... final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); // 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 LineChartDemo2 demo = new LineChartDemo2("Line Chart Demo 2"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }