compile with jcommon-1.0.16, else the chart text doesn't show

jfreeswt.java

package frech;


import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.custom.*;

import org.jfree.experimental.chart.swt.*;
import org.jfree.data.general.*;
import org.jfree.chart.*;
import org.jfree.chart.plot.*;


public class Frech {
	
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);

		shell.setLayout(new GridLayout());
		CTabFolder folder = new CTabFolder(shell, SWT.TOP);
		GridData gd = new GridData(GridData.FILL, GridData.FILL, true, true, 2, 1);
		folder.setLayoutData(gd);

		CTabItem ti=new CTabItem(folder, SWT.NONE);
		ti.setText("Egyes");
		CTabItem ti2=new CTabItem(folder, SWT.NONE);
		ti2.setText("Kettes");
		CTabItem ti3=new CTabItem(folder, SWT.NONE);
		ti3.setText("Hármas");
		CTabItem ti4=new CTabItem(folder, SWT.NONE);
		ti4.setText("Chart");

		Text text = new Text(folder, SWT.BORDER);
		text.setText("Ohai");
		ti.setControl(text);
		ti2.setControl(text);

		Label c3 = new Label(folder, SWT.BORDER);
		c3.setImage(display.getSystemImage(SWT.ICON_ERROR));
		ti3.setControl(c3);

		ChartComposite composite = new ChartComposite(folder, SWT.NONE);
		DefaultPieDataset dataset = new DefaultPieDataset();
		dataset.setValue("Mormota", new Double(49));
		dataset.setValue("Cica", new Double(51));
		JFreeChart piechart = ChartFactory.createPieChart("Állatok", dataset, true, true, false);
		PiePlot plot = (PiePlot) piechart.getPlot();
		plot.setCircular(true);
		composite.setChart(piechart);

		ti4.setControl(composite);


		shell.open();
		while(!shell.isDisposed()) {
			if(!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}
}