Java SE (Java Platform, Standard Edition)

Hi everyone !

     Here is the code that set the user data:

            FXMLLoader loader = new FXMLLoader(getClass().getResource(page.toString()));

            Parent node = (Parent) loader.load();

            loader.getController().setParent(handler);

            controllers.put(page.name(), loader.getController());

            controller = controllers.get(page.name());

           node.setUserData(page.name());

            node.getProperties().put("page", page.name());

     the variable page is an Enum object, I'm using the name 'page.name()' as the user data

     Here is the code that gets the user data

     while (iterator.hasNext()) {

            Node node = iterator.next();

            String name = node.getProperties().get("page").toString();

            System.out.println(name);

            ....

        }

     now this what happens:

     the System.out.println(name); prints out the user data correctly,

     and then I get a NullPointException pointing to

     String name = node.getProperties().get("page").toString();

     the point is System.out.println(name) that prints the user date

     prints it correct.

     pls can some tell me what going on here. Thank!.