Java tutorial
package com.al.cellplugin; /* =========================================================== * 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.] * * ------------------- * LineChartDemo6.java * ------------------- * (C) Copyright 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: LineChartDemo6.java,v 1.5 2004/04/26 19:11:55 taqua Exp $ * * Changes * ------- * 27-Jan-2004 : Version 1 (DG); * */ 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.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; /** * A simple demonstration application showing how to create a line chart using data from an * {@link XYDataset}. * */ public class LineChart { private ChartPanel chartPanel; /** * Creates a new demo. * * @param title the frame title. */ public LineChart(final String title, Object[][] data, Object[] names) { final XYDataset dataset = setDataset(data, names); System.out.println("Number of names : " + names.length); final JFreeChart chart = createChart(dataset); setChartPanel(new ChartPanel(chart)); getChartPanel().setPreferredSize(new java.awt.Dimension(1200, 600)); } public XYDataset setDataset(Object[][] data, Object[] names) { final XYSeriesCollection dataset = new XYSeriesCollection(); for (int i = 1; i < data.length; i++) { String name = (String) data[i][0]; System.out.println("Name: " + name); System.out.println("val: " + data[i][0]); Object[] odata = data[i]; XYSeries series = new XYSeries((String) odata[0]); for (int j = 1; j < odata.length; j++) { System.out.println(odata[j]); series.add(Double.parseDouble((String) odata[j]), i + 1); } dataset.addSeries(series); } return dataset; } /** * 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 of Product SVD [V]", // chart title "X", // x axis label "Y", // y axis label dataset, // data PlotOrientation.VERTICAL, 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.setRangeGridlinesVisible(true); final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(); renderer.setSeriesLinesVisible(0, true); renderer.setSeriesShapesVisible(1, false); plot.setRenderer(renderer); // change the auto tick unit selection to integer units only... final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); //rangeAxis.setTickLabelsVisible(true); // OPTIONAL CUSTOMISATION COMPLETED. return chart; } public ChartPanel getChartPanel() { return chartPanel; } public void setChartPanel(ChartPanel chartPanel) { this.chartPanel = chartPanel; } }