How to use

onChanged

method

in

javafx.collections.ListChangeListener

@Override
public void onChanged(final Change<? extends E> change) {
  delegate.onChanged(change);
}

  @Override
  public void onChanged(final Change<? extends E> change) {
    if (isFxApplicationThread()) {
      getDelegate().onChanged(change);
    } else {
      runLater(() -> getDelegate().onChanged(change));
    }
  }
}

l.onChanged(change);

@Override
public void listChanged(ListEvent<E> source_changes) {
  synchronized (invalidation_listeners) {
    for (int i = invalidation_listeners.size() - 1; i >= 0; i--) {
      invalidation_listeners.get(i).invalidated(this);
    }
  }
  synchronized (list_listeners) {
    for (int i = list_listeners.size() - 1; i >= 0; i--) {
      ListEvent<E> changes_to_distribute = source_changes.copy();
      ListChangeListener.Change<E> change;
      if (source_changes.isReordering()) {
        change = new GLReorderChangeWrapper(this, changes_to_distribute);
      } else {
        change = new GLChangeWrapper(this, changes_to_distribute);
      }
      // noinspection unchecked
      list_listeners.get(i).onChanged(change);
    }
  }
}

private void notifyListeners(Change<? extends E> change) {
  ListHelper.forEach(invalidationListeners, l -> l.invalidated(this));
  ListHelper.forEach(listListeners, l -> l.onChanged(change));
}