Can't read all attribute of my serialized object

Question

Hello everybody,
I've got a problem with my program. I try to serialized a MutableTreeNode root in order to save and then open my JTree.
I serialize it and i have no problem but when i open it the parent hierarchy is saved (x is son of y...) but their name are null. I loose nodes' name... :/
               try {
                    //Je cr�e un fichier temporaire dans le r�p�rtoire courant
                    //Ce fichier est l'arbre (selection de l'utilisateur) serializ�
                    //Flux cr�ant un fichier
                    FileOutputStream fos = new FileOutputStream(this.path);
                    //Flux dans lequel je stocke un objet
                    ObjectOutputStream oos = new ObjectOutputStream(fos);
                    //J'�cris dans mon flux mon objet
                    System.out.println("root before drag = "+this.root); 
                    oos.writeObject(this.root);
                    //On ferme le flux
                    oos.flush();
                    fos.close();
               } catch (FileNotFoundException e1) {
                    System.err.println("FileNotFoundException");
                    e1.printStackTrace();
                    return null;
               } catch (IOException e1) {
                    System.err.println("IOException");
                    return null;
               } catch (ClassCastException e1) {
                    System.err.println("ClassCastException");
                    return null;
               try {
                    FileInputStream fos = new FileInputStream(this.path);
                    ObjectInputStream oos = new ObjectInputStream(fos);
                    //J'�cris dans mon flux mon objet
                    MutableTreeNode sousArbre = (MutableTreeNode) oos.readObject();
                    //On ferme le flux
                    fos.close();
                    //On r�cup�re l'arbre
                    System.out.println("root after drag = " + sousArbre);
                    this.root = sousArbre;
                    modele = new DefaultTreeModel(root);
                    Arbre.setModel(modele);
                    Aide a = new Aide(Arbre);
               } catch (FileNotFoundException e1) {
                    System.err.println("FileNotFoundException");
                    e1.printStackTrace();
               } catch (IOException e1) {
                    System.err.println("IOException");
                    e1.printStackTrace();
               } catch (ClassNotFoundException e1) {
                    System.err.println("ClassNotFoundException");
                    e1.printStackTrace();
               } catch (ClassCastException e1) {
                    System.err.println("ClassCastException");
                    e1.printStackTrace();
               }so:
System.out.println("root before drag = "+this.root);
return node name
Mais :
System.out.println("root after drag = " + sousArbre);
return null
Have you an idea ?
Thx :)

Answer 1

Please check your Node Object, I mean all Objects that you are going to save is serialized or not.