How to monitor changes on objects contained in an ObservableList JavaFX

Question

I really have difficulties to understand how the ObservableList object is working in JavaFX. I want to monitor if an object in the List has been modified. So fa

Answer 1

public static void main(String[] args) {
    ArrayList intList = new ArrayList();
    intList.add(0);
    intList.add(1);

    ObservableList ob = FXCollections.observableArrayList(intList);
    ob.addListener(new ListChangeListener() {
        @Override
        public void onChanged(javafx.collections.ListChangeListener.Change c) {
            System.out.println("Changed on " + c);
            if(c.next()){
                System.out.println(c.getFrom());
            }

        }

    });

    ob.set(0, 1);
}

The event (c in my case) is the index that the change occurred on (when you do .getFrom()). Also if you print the event out you get a string that tells you exactly what happend. You mistakenly interpret it has a change being done on the list as a whole!