ListenerList.java

/******************************************************************
 *
 * CyberUtil for Java
 *
 * Copyright (C) Satoshi Konno 2002
 *
 * File: ListenerList.java
 *
 * Revision;
 *
 * 12/30/02 - first revision.
 *
 ******************************************************************/

package com.guo.duoduo.airplayreceiver.utils;


import java.util.Vector;


public class ListenerList extends Vector
{
    public boolean add(Object obj)
    {
        if (0 <= indexOf(obj))
            return false;
        return super.add(obj);
    }
}