Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package view; import controller.ServerController; import javax.swing.JFrame; import javax.swing.JPanel; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PiePlot; import org.jfree.data.general.DefaultPieDataset; import org.jfree.data.general.PieDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * * @author atef */ public class PieChartDemo1 extends JFrame { static double online; static double offline; public PieChartDemo1(String title, double on, double off) { super(title); online = on; offline = off; online = (online / (online + offline)) * 100; offline = 100 - online; setContentPane(createDemoPanel()); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); this.pack(); RefineryUtilities.centerFrameOnScreen(this); this.setVisible(true); } private static PieDataset createDataset() { DefaultPieDataset dataset = new DefaultPieDataset(); dataset.setValue("Online", new Double(online)); dataset.setValue("offline", new Double(offline)); return dataset; } /** * Creates a chart. * * @param dataset the dataset. * * @return A chart. */ private static JFreeChart createChart(PieDataset dataset) { JFreeChart chart = ChartFactory.createPieChart("Statics", // chart title dataset, // data true, // include legend true, false); PiePlot plot = (PiePlot) chart.getPlot(); plot.setSectionOutlinesVisible(false); plot.setNoDataMessage("No data available"); return chart; } /** * Creates a panel for the demo (used by SuperDemo.java). * * @return A panel. */ public static JPanel createDemoPanel() { JFreeChart chart = createChart(createDataset()); return new ChartPanel(chart); } }