lement.html#ApiLevels">API level 1</a></div>
        
  

      </div>
    <div class="jd-details-descr">
      
  <div class="jd-tagdata jd-tagdescr"><p>Submits a value-returning task for execution and returns a Future
 representing the pending results of the task.  Upon completion,
 this task may be taken or polled.</p></div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Parameters</h5>
      <table class="jd-tagtable">
        <tr>
          <th>task</td>
          <td>the task to submit</td>
