public  void addListDataListener(ListDataListener l) 
{
                                 
        listenerList.add(ListDataListener.class, l);
}

Adds a listener to the list that's notified each time a change to the data model occurs.

 protected  void fireContentsChanged(Object source,
    int index0,
    int index1) 
{
        Object[] listeners = listenerList.getListenerList();
        ListDataEvent e = null;
        for (int i = listeners.length - 2; i  >= 0; i -= 2) {
            if (listeners[i] == ListDataListener.class) {
                if (e == null) {
                    e = new ListDataEvent(source, ListDataEvent.CONTENTS_CHANGED, index0, index1);
                }
                ((ListDataListener)listeners[i+1]).contentsChanged(e);
            }
        }
}

AbstractListModel subclasses must call this method after one or more elements of the list change. The changed elements are specified by the closed interval index0, index1 -- the endpoints are included. Note that index0 need not be less than or equal to index1.

 protected  void fireIntervalAdded(Object source,
    int index0,
    int index1) 
{
        Object[] listeners = listenerList.getListenerList();
        ListDataEvent e = null;
        for (int i = listeners.length - 2; i  >= 0; i -= 2) {
            if (listeners[i] == ListDataListener.class) {
                if (e == null) {
                    e = new ListDataEvent(source, ListDataEvent.INTERVAL_ADDED, index0, index1);
                }
                ((ListDataListener)listeners[i+1]).intervalAdded(e);
            }
        }
}

AbstractListModel subclasses must call this method after one or more elements are added to the model. The new elements are specified by a closed interval index0, index1 -- the enpoints are included. Note that index0 need not be less than or equal to index1.

 protected  void fireIntervalRemoved(Object source,
    int index0,
    int index1) 
{
        Object[] listeners = listenerList.getListenerList();
        ListDataEvent e = null;
        for (int i = listeners.length - 2; i  >= 0; i -= 2) {
            if (listeners[i] == ListDataListener.class) {
                if (e == null) {
                    e = new ListDataEvent(source, ListDataEvent.INTERVAL_REMOVED, index0, index1);
                }
                ((ListDataListener)listeners[i+1]).intervalRemoved(e);
            }
        }
}

AbstractListModel subclasses must call this method after one or more elements are removed from the model. index0 and index1 are the end points of the interval that's been removed. Note that index0 need not be less than or equal to index1.

 public ListDataListener[] getListDataListeners() 
{
        return (ListDataListener[])listenerList.getListeners(
                ListDataListener.class);
}

Returns an array of all the list data listeners registered on this AbstractListModel.

 public T[] getListeners(Class listenerType) 
{
        return listenerList.getListeners(listenerType);
}

Returns an array of all the objects currently registered as FooListeners upon this model. FooListeners are registered using the addFooListener method.

You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a list model m for its list data listeners with the following code:

ListDataListener[] ldls = (ListDataListener[])(m.getListeners(ListDataListener.class));

If no such listeners exist, this method returns an empty array.

 public  void removeListDataListener(ListDataListener l) 
{
        listenerList.remove(ListDataListener.class, l);
}

Removes a listener from the list that's notified each time a change to the data model occurs.