ntil
 the first returns.</p></div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Throws</h5>
      <table class="jd-tagtable">  
        <tr>
            <th><a href="../../../../reference/java/io/IOException.html">IOException</a></td>
            <td>if a problem occurs closing the channel.
</td>
        </tr>
      </table>
  </div>

    </div>
</div>


<A NAME="isOpen()"></A>

<div class="jd-details api apilevel-1"> 
    <h4 class="jd-details-title">
      <span class="normal">
        public 