JAVA | Réafficher une JList

Bonjour,

Je cherche désespérément à supprimer un élément de ma JList, qui comprend un DefaultListModel.
Les données de ma liste proviennent d'une BDD, j'arrive bien a effectuer les requêtes de suppressions mais j'ai toujours un problème sur le ré affichage de l'objet.
J'ai tenter de clear la DLM, puis de réinserer, comme j'fais habituellement pour du réaffichage après insertion ( la dessus pas de soucis )

Bref trêve de blabla je vous montre en speed ce que j'ai, tout d'abord mes déclarations de JList et DLM :

    private DefaultListModel dlm = new DefaultListModel();		
    private JList mesVinsGest = new JList(dlm);
    private JScrollPane monScrollGest = new JScrollPane();
    

    private JList mesVinsSupp = new JList(dlm);
    private JScrollPane monScrollSupp = new JScrollPane();

Voici ensuite la méthode de ré affichage ( qui fonctionne ) :

	private void chargerLaListe(JList laListe, DefaultListModel dlm) {
		dlm.clear();
		laListe.removeAll();
		try {
			Connection conn = DriverManager.getConnection(url, user, passwd);
			Statement etat = conn.createStatement();


			ResultSet resultat = etat.executeQuery("SELECT codebout, nomb FROM bouteille ORDER BY codebout");


			while(resultat.next()){
				if(! resultat.getString("codebout").equals("0"))
				dlm.addElement(resultat.getString("codebout") + " " + resultat.getString("nomb"));
			}

			
            resultat.close();

            etat.close();

			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

et voici le bout de code permettant la suppression :

btnSupp.addActionListener(new ActionListener()
	    {
	        @Override
	        public void actionPerformed(ActionEvent e){
	        	try{
	        		String str = mesVinsSupp.getSelectedValue().toString();
	        		String[] stStrCode = str.split(" ");
		    		

	        		if(!str.equals("")){
	        			Connection conn = DriverManager.getConnection(url, user, passwd);

		    			PreparedStatement ps;	 
		    			PreparedStatement psB;
		    			
		    			ResultSet rsPres;
		    			PreparedStatement psPres;	    			
		    			String sqlstrPresB = null;	 
		    			String sqlstrPres = "SELECT COUNT(*) FROM vinavecappellation WHERE codebout = ?";	    		    			
		    			psPres = conn.prepareStatement(sqlstrPres);	   

		    			psPres.setInt(1, Integer.valueOf(stStrCode[0]));	    

		    			rsPres = psPres.executeQuery();
		    			rsPres.next();

		    			if(rsPres.getInt(1)==1){

			    			sqlstrPres = "DELETE FROM vinavecappellation WHERE codebout = ?";	    		    			
			    			ps = conn.prepareStatement(sqlstrPres);	    			
			    			ps.setInt(1, Integer.valueOf(stStrCode[0]));	    			
			    			ps.executeUpdate();


		    			}
		    			else{

			    			sqlstrPres = "DELETE FROM vinsimple WHERE codebout = ?";	    		    			
			    			ps = conn.prepareStatement(sqlstrPres);
			    			ps.setInt(1, Integer.valueOf(stStrCode[0]));	    			
			    			ps.executeUpdate();
			 



		    			}

		    			sqlstrPresB = "DELETE FROM bouteille WHERE codebout = ?";	
		    			psB = conn.prepareStatement(sqlstrPresB);	   
		    			psB.setInt(1, Integer.valueOf(stStrCode[0]));	
		    			psB.executeUpdate();


		    			rsPres.close();

		    			conn.close();

	        			JOptionPane.showMessageDialog(null, "Cette bouteille à bien été supprimée", "Alerte", JOptionPane.ERROR_MESSAGE); 

	        			
	        		}
	        	}//try
	        	catch(Exception evt){
        			JOptionPane.showMessageDialog(null, "Selectionnez une bouteille", "Alerte", JOptionPane.ERROR_MESSAGE); 

	        	}//catch
        		dlm.removeElementAt(mesVinsSupp.getSelectedIndex());

	        	
        		chargerLaListe(mesVinsSupp,dlm);
        		chargerLaListe(mesVinsGest,dlm);
	            } 

	     });

et bien sur l'erreur :

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at fr.xineroks.mesclasses.Fenetre$2.valueChanged(Fenetre.java:409)
	at javax.swing.JList.fireSelectionValueChanged(Unknown Source)
	at javax.swing.JList$ListSelectionHandler.valueChanged(Unknown Source)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
	at javax.swing.DefaultListSelectionModel.removeIndexInterval(Unknown Source)
	at javax.swing.plaf.basic.BasicListUI$Handler.intervalRemoved(Unknown Source)
	at javax.swing.AbstractListModel.fireIntervalRemoved(Unknown Source)
	at javax.swing.DefaultListModel.removeElementAt(Unknown Source)
	at fr.xineroks.mesclasses.Fenetre$3.actionPerformed(Fenetre.java:550)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

Merci de votre aide, car je bloque sur un truc tout bête pour terminer mon application


Cordialement,

Xineroks