lass="api apilevel-1"><a href="../../../reference/java/util/HashSet.html">HashSet</a></li>
          <li class="api apilevel-1"><a href="../../../reference/java/util/Hashtable.html">Hashtable</a></li>
          <li class="api apilevel-1"><a href="../../../reference/java/util/IdentityHashMap.html">IdentityHashMap</a></li>
          <li class="api apilevel-1"><a href="../../../reference/java/util/LinkedHashMap.html">LinkedHashMap</a></li>
          <li class="api apilevel-1"><a href="../../../reference/java/u