Ho inserito un grafico a torta in un pannello, ma ora come faccio a ridimensinarlo?
codice:
package grafici;

import java.awt.EventQueue;

import javax.swing.JFrame;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.RefineryUtilities;

import java.awt.Panel;
import java.awt.event.ContainerListener;

import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.border.MatteBorder;

public class Provagrafici {

    private JFrame frame;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Provagrafici window = new Provagrafici();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public Provagrafici() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 450, 335);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        JPanel panel = new JPanel();
        FlowLayout flowLayout = (FlowLayout) panel.getLayout();
        flowLayout.setVgap(0);
        flowLayout.setHgap(0);
        panel.setBackground(Color.GREEN);
        panel.setBounds(10, 11, 272, 247);
        frame.getContentPane().add(panel);

        GraficoTorta chartPanel = new GraficoTorta();
        panel.add(chartPanel.createChartPanelMetodo());

        JPanel panel_1 = new JPanel();
        panel_1.setBounds(292, 51, 113, 117);
        panel_1.setBackground(Color.GREEN);
        frame.getContentPane().add(panel_1);

        GraficoTorta provaTorta = new GraficoTorta();
        panel_1.add(provaTorta.createChartPanelMetodo());
    }
}
Classe per creare il mio grafico con metodi.
codice:
package grafici;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;

public class GraficoTorta {
    public GraficoTorta() {
        super();
        final PieDataset dataset = createDataset();
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(50, 50));
        // setContentPane(chartPanel);
    }

    public PieDataset createDataset() {
        final DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Uno", new Double(43.2));
        dataset.setValue("Due", new Double(10.0));
        dataset.setValue("Tre", new Double(27.5));
        dataset.setValue("Quattro", new Double(17.5));
        dataset.setValue("Cinque", new Double(11.0));
        dataset.setValue("Sei", new Double(19.4));
        return dataset;
    }

    public JFreeChart createChart(final PieDataset dataset) {
        final JFreeChart chart = ChartFactory.createPieChart("Grafico a Torta", dataset, true, true, false);
        final PiePlot plot = (PiePlot) chart.getPlot();
        plot.setInteriorGap(0.0);
        plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{2} {0}={1}"));
        return chart;
    }

    public JPanel createChartPanelMetodo() {
        DefaultPieDataset pieDataset = new DefaultPieDataset();
        pieDataset.setValue("one", 10);
        pieDataset.setValue("two", 20);
        pieDataset.setValue("three", 30);
        pieDataset.setValue("four", 40);
        pieDataset.setValue("five", 20);
        pieDataset.setValue("six", 10);
        JFreeChart chart = ChartFactory.createPieChart("3d pie chart", pieDataset, true, true, true);
        return new ChartPanel(chart);
    }
}