Java Code Examples for org.jfree.chart.ChartFactory#createPieChart()

/**
 * Draws a pie chart where the label generator returns null.
 */
@Test
public void testDrawWithNullLegendLabels() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("L1", 12.0);
    dataset.setValue("L2", 11.0);
    JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
            false, false);
    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
    boolean success = false;
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
      success = false;
    }
    assertTrue(success);
}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Pie Chart Demo 1",  // chart title
        dataset,             // data
        true,               // include legend
        true,
        false
    );

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setSectionOutlinesVisible(false);
    plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
    plot.setNoDataMessage("No data available");
    plot.setCircular(false);
    plot.setLabelGap(0.02);
    return chart;
}
 

/**
 * Creates a pie chart.
 *
 * @return The pie chart.
 */
private static JFreeChart createPieChart() {
    // create a dataset...
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Java", new Double(43.2));
    data.setValue("Visual Basic", new Double(0.0));
    data.setValue("C/C++", new Double(17.5));

    // create the chart...
    return ChartFactory.createPieChart("Pie Chart",  // chart title
                                       data,         // data
                                       true,         // include legend
                                       true,
                                       false
                                       );
}
 

/**
 * Creates a chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {
    
    JFreeChart chart = ChartFactory.createPieChart(
        "Pie Chart Demo 1",  // chart title
        dataset,             // data
        true,               // include legend
        true,
        false
    );

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setSectionOutlinesVisible(false);
    plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 10));
    plot.setNoDataMessage("No data available");
    plot.setSimpleLabels(true);
    return chart;
    
}
 

/**
 * Creates a chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {
    
    JFreeChart chart = ChartFactory.createPieChart(
        "Pie Chart Demo 1",  // chart title
        dataset,             // data
        true,               // include legend
        true,
        false
    );

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setSectionOutlinesVisible(false);
    plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
    plot.setNoDataMessage("No data available");
    plot.setCircular(false);
    plot.setLabelGap(0.02);
    return chart;
    
}
 

/**
 * Draws a pie chart where the label generator returns null.
 */
@Test
public void testDrawWithNullLegendLabels() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("L1", 12.0);
    dataset.setValue("L2", 11.0);
    JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
            false, false);
    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
    boolean success = false;
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
      success = false;
    }
    assertTrue(success);
}
 

/**
 * Draws a pie chart where the label generator returns null.
 */
@Test
public void testDrawWithNullLegendLabels() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("L1", 12.0);
    dataset.setValue("L2", 11.0);
    JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
            false, false);
    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
    boolean success = false;
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
      success = false;
    }
    assertTrue(success);
}
 

/**
 * Creates a pie chart.
 *
 * @return The pie chart.
 */
private static JFreeChart createPieChart() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("Java", new Double(43.2));
    dataset.setValue("Visual Basic", new Double(0.0));
    dataset.setValue("C/C++", new Double(17.5));
    return ChartFactory.createPieChart("Pie Chart", dataset, true);
}
 

/**
 * Common test setup.
 */
protected void setUp() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("Java", new Double(43.2));
    dataset.setValue("Visual Basic", new Double(0.0));
    dataset.setValue("C/C++", new Double(17.5));
    this.pieChart = ChartFactory.createPieChart("Pie Chart", dataset,
            true);
}
 

/**
 * Some checks for the default legend firing change events.
 */
public void testLegendEvents() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset, true);
    chart.addChangeListener(this);
    this.lastChartChangeEvent = null;
    LegendTitle legend = chart.getLegend();
    legend.setPosition(RectangleEdge.TOP);
    assertNotNull(this.lastChartChangeEvent);
}
 

/**
 * Some checks for title changes and event notification.
 */
public void testTitleChangeEvent() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset, true);
    chart.addChangeListener(this);
    this.lastChartChangeEvent = null;
    TextTitle t = chart.getTitle();
    t.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    // now create a new title and replace the existing title, several
    // things should happen:
    // (1) Adding the new title should trigger an immediate
    //     ChartChangeEvent;
    // (2) Modifying the new title should trigger a ChartChangeEvent;
    // (3) Modifying the old title should NOT trigger a ChartChangeEvent
    TextTitle t2 = new TextTitle("T2");
    chart.setTitle(t2);
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    t2.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    t.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;
}
 

/**
 * Generate disk statistics
 */
public JFreeChart diskStats() throws IOException, ServletException {
	String repHome = null;

	// Allow absolute repository path
	if ((new File(Config.REPOSITORY_HOME)).isAbsolute()) {
		repHome = Config.REPOSITORY_HOME;
	} else {
		repHome = Config.HOME_DIR + File.separator + Config.REPOSITORY_HOME;
	}

	File df = new File(repHome);
	long total = df.getTotalSpace();
	long usable = df.getUsableSpace();
	long used = total - usable;
	String title = "Disk: " + FormatUtil.formatSize(total);

	log.debug("Total space: {}", FormatUtil.formatSize(total));
	log.debug("Usable space: {}", FormatUtil.formatSize(usable));
	log.debug("Used space: {}", FormatUtil.formatSize(used));

	DefaultPieDataset dataset = new DefaultPieDataset();
	dataset.setValue("Available (" + FormatUtil.formatSize(usable) + ")", usable * 100 / total);
	dataset.setValue("Used (" + FormatUtil.formatSize(used) + ")", used * 100 / total);

	return ChartFactory.createPieChart(title, dataset, true, false, false);
}
 

/**
 * Some checks for the getSubtitles() method.
 */
public void testGetSubtitles() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset, true);
    List subtitles = chart.getSubtitles();

    assertEquals(1, chart.getSubtitleCount());

    // adding something to the returned list should NOT change the chart
    subtitles.add(new TextTitle("T"));
    assertEquals(1, chart.getSubtitleCount());
}
 

/**
 * Generate memory statistics
 * http://casidiablo.net/capturar-informacion-sistema-operativo-java/
 */
public JFreeChart osMemStats() throws IOException, ServletException {
	DefaultPieDataset dataset = new DefaultPieDataset();
	Sigar sigar = new Sigar();
	String title = null;

	try {
		Mem mem = sigar.getMem();
		long max = mem.getRam();
		long available = mem.getFree();
		long total = mem.getTotal();
		long used = mem.getUsed();
		long free = mem.getFree();
		title = "OS memory: " + FormatUtil.formatSize(total);

		log.debug("OS maximun memory: {}", FormatUtil.formatSize(max));
		log.debug("OS available memory: {}", FormatUtil.formatSize(available));
		log.debug("OS free memory: {}", FormatUtil.formatSize(free));
		log.debug("OS used memory: {}", FormatUtil.formatSize(used));
		log.debug("OS total memory: {}", FormatUtil.formatSize(total));

		dataset.setValue("Available (" + FormatUtil.formatSize(free) + ")", free * 100 / total);
		dataset.setValue("Used (" + FormatUtil.formatSize(used) + ")", used * 100 / total);
	} catch (SigarException se) {
		title = "OS memory: " + se.getMessage();
	} catch (UnsatisfiedLinkError ule) {
		title = "OS memory: (missing native libraries)";
	}

	return ChartFactory.createPieChart(title, dataset, true, false, false);
}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Smart Phones Manufactured / Q3 2011", dataset);

    // set a custom background for the chart
    chart.setBackgroundPaint(new GradientPaint(new Point(0, 0), 
            new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));

    // customise the title position and font
    TextTitle t = chart.getTitle();
    t.setHorizontalAlignment(HorizontalAlignment.LEFT);
    t.setPaint(new Color(240, 240, 240));
    t.setFont(new Font("Arial", Font.BOLD, 26));

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setBackgroundPaint(null);
    plot.setInteriorGap(0.04);
    plot.setOutlineVisible(false);

    // use gradients and white borders for the section colours
    plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
    plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
    plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
    plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
    plot.setDefaultSectionOutlinePaint(Color.WHITE);
    plot.setSectionOutlinesVisible(true);
    plot.setDefaultSectionOutlineStroke(new BasicStroke(2.0f));

    // customise the section label appearance
    plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
    plot.setLabelLinkPaint(Color.WHITE);
    plot.setLabelLinkStroke(new BasicStroke(2.0f));
    plot.setLabelOutlineStroke(null);
    plot.setLabelPaint(Color.WHITE);
    plot.setLabelBackgroundPaint(null);
    
    // add a subtitle giving the data source
    TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
            new Font("Courier New", Font.PLAIN, 12));
    source.setPaint(Color.WHITE);
    source.setPosition(RectangleEdge.BOTTOM);
    source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
    chart.addSubtitle(source);
    return chart;

}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Smart Phones Manufactured / Q3 2011",  // chart title
        dataset,            // data
        false,              // no legend
        true,               // tooltips
        false               // no URL generation
    );

    // set a custom background for the chart
    chart.setBackgroundPaint(new GradientPaint(new Point(0, 0), 
            new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));

    // customise the title position and font
    TextTitle t = chart.getTitle();
    t.setHorizontalAlignment(HorizontalAlignment.LEFT);
    t.setPaint(new Color(240, 240, 240));
    t.setFont(new Font("Arial", Font.BOLD, 26));

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setBackgroundPaint(null);
    plot.setInteriorGap(0.04);
    plot.setOutlineVisible(false);

    // use gradients and white borders for the section colours
    plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
    plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
    plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
    plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
    plot.setBaseSectionOutlinePaint(Color.WHITE);
    plot.setSectionOutlinesVisible(true);
    plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));

    // customise the section label appearance
    plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
    plot.setLabelLinkPaint(Color.WHITE);
    plot.setLabelLinkStroke(new BasicStroke(2.0f));
    plot.setLabelOutlineStroke(null);
    plot.setLabelPaint(Color.WHITE);
    plot.setLabelBackgroundPaint(null);
    
    // add a subtitle giving the data source
    TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
            new Font("Courier New", Font.PLAIN, 12));
    source.setPaint(Color.WHITE);
    source.setPosition(RectangleEdge.BOTTOM);
    source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
    chart.addSubtitle(source);
    return chart;

}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Smart Phones Manufactured / Q3 2011",  // chart title
        dataset,            // data
        false,              // no legend
        true,               // tooltips
        false               // no URL generation
    );

    // set a custom background for the chart
    chart.setBackgroundPaint(new GradientPaint(new Point(0, 0), 
            new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));

    // customise the title position and font
    TextTitle t = chart.getTitle();
    t.setHorizontalAlignment(HorizontalAlignment.LEFT);
    t.setPaint(new Color(240, 240, 240));
    t.setFont(new Font("Arial", Font.BOLD, 26));

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setBackgroundPaint(null);
    plot.setInteriorGap(0.04);
    plot.setOutlineVisible(false);

    // use gradients and white borders for the section colours
    plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
    plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
    plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
    plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
    plot.setBaseSectionOutlinePaint(Color.WHITE);
    plot.setSectionOutlinesVisible(true);
    plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));

    // customise the section label appearance
    plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
    plot.setLabelLinkPaint(Color.WHITE);
    plot.setLabelLinkStroke(new BasicStroke(2.0f));
    plot.setLabelOutlineStroke(null);
    plot.setLabelPaint(Color.WHITE);
    plot.setLabelBackgroundPaint(null);
    
    // add a subtitle giving the data source
    TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
            new Font("Courier New", Font.PLAIN, 12));
    source.setPaint(Color.WHITE);
    source.setPosition(RectangleEdge.BOTTOM);
    source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
    chart.addSubtitle(source);
    return chart;

}
 

private void renderChartInfo() {
    HashMap<Object, Marker> marks = new HashMap<>();
    DefaultPieDataset dataset = buildDataset(marks);

    JFreeChart chart = ChartFactory.createPieChart(
            null, // chart title
            dataset, // data
            true, // include legend
            true,
            false);
    chart.setBackgroundPaint(null);
    //chart.setBorderStroke(null);
    chart.setBorderVisible(false);
    final PiePlot plot = (PiePlot) chart.getPlot();
    // plot.setBackgroundPaint(null);
    //  plot.setShadowPaint(null);

    for(Object o: marks.keySet()) {
        if (iCurrentView == ID_ALLY_CHART) {
            Ally a = (Ally) o;
            plot.setSectionPaint(a.getTag(), marks.get(a).getMarkerColor());
        } else {
            Tribe t = (Tribe) o;
            plot.setSectionPaint(t.getName(), marks.get(t).getMarkerColor());
        }
    }
    //plot.setCircular(true);
    //  plot.setMaximumLabelWidth(30.0);
 /*
     * plot.setLabelGenerator(new StandardPieSectionLabelGenerator( "{0} = {2}", NumberFormat.getNumberInstance(),
     * NumberFormat.getPercentInstance()));
     */
    //   chart.getLegend().setVerticalAlignment(VerticalAlignment.CENTER);
    //  chart.getLegend().setPosition(RectangleEdge.RIGHT);
    // plot.setMaximumLabelWidth(20.0);
    plot.setLabelGenerator(null);
    plot.setBackgroundPaint(Constants.DS_BACK);
    /*
     * plot.setInteriorGap(0.0); plot.setLabelGap(0.0);
     */
    plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(
            "{0} = {2}", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance()));

    /*
     * plot.getL plot.setLabelFont(g2d.getFont().deriveFont(10.0f));
     */


    //plot.setLabelGenerator(null);

    //plot.setMaximumLabelWidth(30.0);
    //plot.getLabelDistributor().distributeLabels(10.0, 20.0);
    //chart.draw(g2d, new Rectangle2D.Float(20, 20, 100, 100));

    //  g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));
    plot.setOutlineVisible(false);
    mChartImage = chart.createBufferedImage(getWidth(), getHeight());
    //chart.draw(g2d, new Rectangle2D.Float(50, 50, 400, 400));
    //g2d.drawImage(bi, 30, 30, null);

    //  g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));

    //bi = chart.createBufferedImage(240, 240);
    // g2d.drawImage(bi, 30, 30, null);
}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Smart Phones Manufactured / Q3 2011",  // chart title
        dataset,            // data
        false,              // no legend
        true,               // tooltips
        false               // no URL generation
    );

    // set a custom background for the chart
    chart.setBackgroundPaint(new GradientPaint(new Point(0, 0), 
            new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));

    // customise the title position and font
    TextTitle t = chart.getTitle();
    t.setHorizontalAlignment(HorizontalAlignment.LEFT);
    t.setPaint(new Color(240, 240, 240));
    t.setFont(new Font("Arial", Font.BOLD, 26));

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setBackgroundPaint(null);
    plot.setInteriorGap(0.04);
    plot.setOutlineVisible(false);

    // use gradients and white borders for the section colours
    plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
    plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
    plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
    plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
    plot.setBaseSectionOutlinePaint(Color.WHITE);
    plot.setSectionOutlinesVisible(true);
    plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));

    // customise the section label appearance
    plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
    plot.setLabelLinkPaint(Color.WHITE);
    plot.setLabelLinkStroke(new BasicStroke(2.0f));
    plot.setLabelOutlineStroke(null);
    plot.setLabelPaint(Color.WHITE);
    plot.setLabelBackgroundPaint(null);
    
    // add a subtitle giving the data source
    TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
            new Font("Courier New", Font.PLAIN, 12));
    source.setPaint(Color.WHITE);
    source.setPosition(RectangleEdge.BOTTOM);
    source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
    chart.addSubtitle(source);
    return chart;

}
 

/**
 * Creates a chart.
 *
 * @param dataset  the dataset.
 *
 * @return A chart.
 */
private static JFreeChart createChart(PieDataset dataset) {

    JFreeChart chart = ChartFactory.createPieChart(
        "Smart Phones Manufactured / Q3 2011",  // chart title
        dataset,            // data
        false,              // no legend
        true,               // tooltips
        false               // no URL generation
    );

    // set a custom background for the chart
    chart.setBackgroundPaint(new GradientPaint(new Point(0, 0), 
            new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));

    // customise the title position and font
    TextTitle t = chart.getTitle();
    t.setHorizontalAlignment(HorizontalAlignment.LEFT);
    t.setPaint(new Color(240, 240, 240));
    t.setFont(new Font("Arial", Font.BOLD, 26));

    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setBackgroundPaint(null);
    plot.setInteriorGap(0.04);
    plot.setOutlineVisible(false);

    // use gradients and white borders for the section colours
    plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
    plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
    plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
    plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
    plot.setBaseSectionOutlinePaint(Color.WHITE);
    plot.setSectionOutlinesVisible(true);
    plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));

    // customise the section label appearance
    plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
    plot.setLabelLinkPaint(Color.WHITE);
    plot.setLabelLinkStroke(new BasicStroke(2.0f));
    plot.setLabelOutlineStroke(null);
    plot.setLabelPaint(Color.WHITE);
    plot.setLabelBackgroundPaint(null);
    
    // add a subtitle giving the data source
    TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
            new Font("Courier New", Font.PLAIN, 12));
    source.setPaint(Color.WHITE);
    source.setPosition(RectangleEdge.BOTTOM);
    source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
    chart.addSubtitle(source);
    return chart;

}