Bonjour,

J'aimerais faire en sorte qu'une légende s'affiche sur un graphe.
Par exemple, je souhaiterais que "Serie1" soit écrit sur la zone rouge dans mon graphe.

Voici mon code:
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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import java.awt.Color;
 
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
 
/**
 * A simple demonstration application showing how to create a stacked area chart using data from a
 * {@link CategoryDataset}.
 */
public class StackedAreaChartDemo extends ApplicationFrame {
 
    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public StackedAreaChartDemo(final String title) {
        super(title);
        CategoryDataset dataset = createDataset();
        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.
     */
    public CategoryDataset createDataset() {
        final double[][] data = new double[][] {
            {1.0, 4.0, 3.0, 5.0, 5.0, 7.0, 7.0, 8.0 },
            {5.0, 7.0, 6.0, 8.0, 4.0, 4.0, 2.0, 1.0 },
            {4.0, 3.0, 2.0, 3.0, 6.0, 3.0, 4.0, 3.0 }
        };
 
        final CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
            "Series ", "Type ", data
        );
        return dataset;
    }
 
    /**
     * Creates a sample chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return A sample chart.
     */
    public JFreeChart createChart(CategoryDataset dataset) {
 
        final JFreeChart chart = ChartFactory.createStackedAreaChart(
            "Stacked Area Chart",      // chart title
            "Category",                // domain axis label
            "Value",                   // range axis label
            dataset,                   // data
            PlotOrientation.VERTICAL,  // orientation
            true,                      // include legend
            true,
            false
        );
 
        chart.setBackgroundPaint(Color.white);
 
        final CategoryPlot plot = (CategoryPlot) chart.getPlot();
        plot.setForegroundAlpha(0.5f);
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinePaint(Color.white);
 
        final CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setLowerMargin(0.0);
        domainAxis.setUpperMargin(0.0);
 
        // change the auto tick unit selection to integer units only...
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
 
        final CategoryItemRenderer renderer = plot.getRenderer();
        renderer.setItemLabelsVisible(true);
 
        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 StackedAreaChartDemo demo = new StackedAreaChartDemo("Stacked Area Chart Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
}
Quelqu'un saurait-il m'expliquer comment faire ?

Merci d'avance pour votre aide.