problème entre Swing et SwingWorker

package des.jet.appli.main.test;
 
import java.awt.Color;
import java.util.ArrayList;
import java.util.Collection;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
import des.jet.appli.ihm.sortie.onglet1.Dessin;
import des.jet.appli.utils.business.Des;
import des.jet.appli.utils.business.Stat;
import des.jet.appli.utils.constantes.SortieOnglet1;
 
@SuppressWarnings("serial")
publicclass FrameTest extends JFrame implements SortieOnglet1{
private Dessin jDessin;
private JButton start;
private JButton exit;
private JButton stop;

private Collection<Des>cDes;
private ThreadSwingWorker swingWorker;

public FrameTest(){
		init();
		ajoutButton();
}
 
privatevoid ajoutButton(){
		JPanel jPanelButtons = new JPanel();
this.getContentPane().add(jPanelButtons, "South");

		start = new JButton("Start");
		start.addActionListener(new GestionActionButton(this, 1));
		jPanelButtons.add(start);

		stop = new JButton("Stop");
		stop.addActionListener(new GestionActionButton(this, 2));
		jPanelButtons.add(stop);

		exit = new JButton("Exit");
		exit.addActionListener(new GestionActionButton(this, 3));
		jPanelButtons.add(exit);
}
 
privatevoid init(){
/* Construction de l'interface graphique. */
this.setTitle("test Thread");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setBounds(400, 100, FRAME_RESULT_ONGLET1_WIDTH, FRAME_RESULT_ONGLET1_HEIGHT);

        jDessin = new Dessin(new Stat(), Color.RED);
this.getContentPane().add(jDessin, "Center");
this.setVisible(true);

// ajout des dés pour les tests
		cDes = new ArrayList<Des>();
		cDes.add(new Des(9,5));
//		cDes.add(new Des(5,6));
//		cDes.add(new Des(15,10));

		swingWorker = new ThreadSwingWorker(this);
}
 
public Dessin getJDessin(){
return jDessin;
}
 
publicvoid setJDessin(Dessin dessin){
		jDessin = dessin;
}
 
public Collection<Des> getCDes(){
return cDes;
}
 
publicvoid setCDes(Collection<Des> des){
		cDes = des;
}
 
public ThreadSwingWorker getSwingWorker(){
return swingWorker;
}
 
publicvoid setSwingWorker(ThreadSwingWorker swingWorker){
this.swingWorker = swingWorker;
}


}
 

package des.jet.appli.ihm.sortie.onglet1;
 
import java.awt.Color;
import java.awt.Graphics;
 
import javax.swing.JPanel;
 
import des.jet.appli.utils.business.Stat;
import des.jet.appli.utils.constantes.SortieOnglet1;
 
@SuppressWarnings("serial")
publicclass Dessin extends JPanel implements SortieOnglet1{
private Stat dataStat;
private Color couleur;

public Dessin(Stat dataStat, Color couleur){
this.dataStat = dataStat;
this.couleur = couleur;
this.setBounds(10, 10, 200, 100);
 
}

	@Override
publicvoid paintComponent(Graphics g){
super.paintComponent(g);
		Rectangle R = new Rectangle(10, 10, FRAME_RESULT_ONGLET1_GRAPH_WIDTH + 10,
				FRAME_RESULT_ONGLET1_GRAPH_HEIGHT + 10, Color.blue,g);

if(dataStat != null && dataStat.getLoiProba() != null && dataStat.getLoiProba().length != 0){
			dessiner(g);
}
}
 
publicvoid dessiner(Graphics g){
int l, y, a;
double h = FRAME_RESULT_ONGLET1_GRAPH_HEIGHT / dataStat.getValMax();

if(dataStat.getLoiProba().length < FRAME_RESULT_ONGLET1_GRAPH_WIDTH){
			l = FRAME_RESULT_ONGLET1_GRAPH_WIDTH / dataStat.getLoiProba().length;
			a = 1;
}
else{
			l = 1;
			a = dataStat.getLoiProba().length / FRAME_RESULT_ONGLET1_GRAPH_WIDTH;
}

for(int x = 0; a * x < dataStat.getLoiProba().length; x++){
			y = FRAME_RESULT_ONGLET1_GRAPH_HEIGHT - (int)(dataStat.getLoiProba()[a * x] * h);
new Rectangle(x * l + 15, y + 15, l, (int)(dataStat.getLoiProba()[a * x] * h), couleur, g);
}
}
 
publicvoid redessiner(Stat dataStat, Color couleur){
this.dataStat = dataStat;
this.couleur = couleur;
		Graphics g = getGraphics();

		g.clearRect(10, 10, FRAME_RESULT_ONGLET1_GRAPH_WIDTH + 10,
				FRAME_RESULT_ONGLET1_GRAPH_HEIGHT + 10);

		dessiner(g);
}
 
 
public Stat getDataStat(){
return dataStat;
}
 
 
 
publicvoid setDataStat(Stat dataStat){
this.dataStat = dataStat;
}


}
 

 
package des.jet.appli.main.test;
 
import java.awt.Color;
import java.util.List;
 
import javax.swing.SwingWorker;
 
import des.jet.appli.utils.business.Stat;
import des.jet.appli.utils.calculs.CalculsProgressifsUtils;
import des.jet.appli.utils.constantes.SortieOnglet1;
 
class ThreadSwingWorker extends SwingWorker<Stat, Stat> implements SortieOnglet1{
private FrameTest frame;
privateint boucle = 1;
privateint processe = 1;
privateboolean bFinish = true;

public ThreadSwingWorker(FrameTest frame){
this.frame = frame;
}
 
    @Override
public Stat doInBackground(){
    	Stat stat = new Stat();

try{
while(bFinish){
    			Thread.sleep(DEFAULT_LOOP_WAIT);
    			stat = CalculsProgressifsUtils.getCalculsProgressifsUtils().boucleTirageAleatoire(stat, frame.getCDes(), 100);
            	publish(stat);
            	System.out.println("boucle n° : " + boucle);
            	boucle++;
 
if(boucle == DEFAULT_LOOP_NUMBER)bFinish = false;
}
}
catch(InterruptedException e){
			e.printStackTrace();
}

return stat;
}
 
    @Override
protectedvoid process(List<Stat> stats){
/** Mise à jour du JPanel de dessin **/
    	System.out.println("processe n° : " + processe + "     nb param dans process : " + stats.size());
    	Stat stat = stats.get(0);
    	stat.calculValMax();
        frame.getJDessin().redessiner(stats.get(0), Color.RED);
        processe++;
}
 
    @Override
protectedvoid done(){
       frame.setSwingWorker(new ThreadSwingWorker(frame));
}
 
publicboolean isBFinish(){
return bFinish;
}
 
publicvoid setBFinish(boolean finish){
		bFinish = finish;
}

}
 

package des.jet.appli.main.test;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.SwingWorker;
 
publicclass GestionActionButton implements ActionListener {
private FrameTest frameTest;
privateint choix;

public GestionActionButton(FrameTest frameTest, int choix){
this.frameTest = frameTest;
this.choix = choix;
}
 
	@Override
publicvoid actionPerformed(ActionEvent arg0){
if(choix == 1){
if(frameTest.getSwingWorker().getState() != SwingWorker.StateValue.STARTED){
				frameTest.getSwingWorker().execute();
}
}
elseif(choix == 2){
			frameTest.getSwingWorker().setBFinish(false);
			System.out.println("Stop");
}
elseif(choix == 3){
			System.exit(0);
}
 
}
 
}