NotificationEmitterSupport.java 文件源码

public void removeNotificationListener(NotificationListener listener)
    throws ListenerNotFoundException {

    synchronized (listenerLock) {
        List<ListenerInfo> newList = new ArrayList<>(listenerList);
        /* We scan the list of listeners in reverse order because
           in forward order we would have to repeat the loop with
           the same index after a remove.  */
        for (int i=newList.size()-1; i>=0; i--) {
            ListenerInfo li = newList.get(i);

            if (li.listener == listener)
                newList.remove(i);
        }
        if (newList.size() == listenerList.size())
            throw new ListenerNotFoundException("Listener not registered");
        listenerList = newList;
    }
}