ef="../../../../reference/java/util/concurrent/ExecutorCompletionService.html#poll()">poll</a></span>()</nobr>
        
        <div class="jd-descrdiv">Retrieves and removes the Future representing the next
 completed task, or <code>null</code> if none are present.</div>
  
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            <a href="../../../../reference/java/util/concurrent/Future.html">Futu