Java tutorial
/************************************************************************* * * * Mureithi David Wachira * * * * Mobile: +254 (0) 722 413 699 * * Email: davidwachira90@students.uonbi.ac.ke * * Website: davidwachira.com * * * * Date: Wednesday 30th April 2014 * * * * KCSE 2013 Results Application * * * *************************************************************************/ package kcse_2013_results; /* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2005, 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.] * * ------------------ * PieChartDemo1.java * ------------------ * (C) Copyright 2003-2005, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): ; * * $Id: PieChartDemo1.java,v 1.2 2005/03/28 19:38:45 mungady Exp $ * * Changes * ------- * 09-Mar-2005 : Version 1, copied from the demo collection that ships with * the JFreeChart Developer Guide (DG); * */ import java.awt.Font; import java.awt.Frame; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JRootPane; import javax.swing.Timer; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PiePlot; import org.jfree.chart.plot.PiePlot3D; import org.jfree.data.general.DefaultPieDataset; import org.jfree.data.general.PieDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A simple demonstration application showing how to create a pie chart using * data from a {@link DefaultPieDataset}. */ public class Pie_Chart_KCSE_School_Performance extends JFrame { /** * Default constructor. * * @param title the frame title. */ public Pie_Chart_KCSE_School_Performance(String title) { super(title); setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE); } /** * Creates a sample dataset. * * @return A sample dataset. */ private PieDataset createDataset(int[] array_school_grades_count) { DefaultPieDataset dataset = new DefaultPieDataset(); if (((double) array_school_grades_count[0]) != 0) { dataset.setValue("Grade A", new Double((double) array_school_grades_count[0])); } if (((double) array_school_grades_count[1]) != 0) { dataset.setValue("Grade A-", new Double((double) array_school_grades_count[1])); } if (((double) array_school_grades_count[2]) != 0) { dataset.setValue("Grade B+", new Double((double) array_school_grades_count[2])); } if (((double) array_school_grades_count[3]) != 0) { dataset.setValue("Grade B", new Double((double) array_school_grades_count[3])); } if (((double) array_school_grades_count[4]) != 0) { dataset.setValue("Grade B-", new Double((double) array_school_grades_count[4])); } if (((double) array_school_grades_count[5]) != 0) { dataset.setValue("Grade C+", new Double((double) array_school_grades_count[5])); } if (((double) array_school_grades_count[6]) != 0) { dataset.setValue("Grade C", new Double((double) array_school_grades_count[6])); } if (((double) array_school_grades_count[7]) != 0) { dataset.setValue("Grade C-", new Double((double) array_school_grades_count[7])); } if (((double) array_school_grades_count[8]) != 0) { dataset.setValue("Grade D+", new Double((double) array_school_grades_count[8])); } if (((double) array_school_grades_count[9]) != 0) { dataset.setValue("Grade D", new Double((double) array_school_grades_count[9])); } if (((double) array_school_grades_count[10]) != 0) { dataset.setValue("Grade D-", new Double((double) array_school_grades_count[10])); } if (((double) array_school_grades_count[11]) != 0) { dataset.setValue("Grade E", new Double((double) array_school_grades_count[11])); } if (((double) array_school_grades_count[12]) != 0) { dataset.setValue(" *** ", new Double((double) array_school_grades_count[12])); } return dataset; } /** * Creates a chart. * * @param dataset the dataset. * * @return A chart. */ public JFreeChart createChart(PieDataset dataset) { JFreeChart chart = ChartFactory.createPieChart3D("KCSE 2013 Results Summary ", // chart title dataset, // data true, // include legend true, false); PiePlot3D plot = (PiePlot3D) chart.getPlot(); plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12)); plot.setNoDataMessage("No data available"); plot.setForegroundAlpha(0.95f); plot.setCircular(true); plot.setLabelGap(0.02); return chart; } /** * Creates a panel for the demo (used by SuperDemo.java). * * @return A panel. */ public JPanel createDemoPanel(int[] array_school_grades_count) { JFreeChart chart = createChart(createDataset(array_school_grades_count)); return new ChartPanel(chart); } /** * Starting point for the demonstration application. * * @param args ignored. */ /* public static void main(String[] args) { Pie_Chart_KCSE_School_Performance demo = new Pie_Chart_KCSE_School_Performance("Pie Chart Demo 1"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } */ public void Get_Grades_Count_to_be_set_in_dataset(int[] array_school_grades_count) { setContentPane(createDemoPanel(array_school_grades_count)); } }