title: Java: reverse the order of the iteration on an hashtable keySet. How?
body: <p>I'm iterating on an hashtable, concatenating the string values:</p>
  
  <pre><code>    Iterator&lt;String&gt; it = jsonHashtableTemp.keySet().iterator();
      String json = new String("[");
      while (it.hasNext()) {
          String s = it.next();
          json = json.concat(jsonHashtableTemp.get(s).toString());
          if (it.hasNext()) {
               json = json.concat(", ");
          }
      }
      json = json.concat("]");
  </code></pre>
  
  <p>I would to reverse the order of the iteration . </p>
  
  <p>Is it possible?</p>