Enumeration names = Collections.enumeration(properties.keySet());
HashSet set = new HashSet(); set.addAll(properties.keySet()); set.add("JMSXDeliveryCount"); Enumeration names = Collections.enumeration(set);
   public Enumeration getPropertyNames() throws JMSException   {      Enumeration names = Collections.enumeration(properties.keySet());      return names;   }