contains3 : Practice-It

public static boolean contains3(List<String> l) {
   Map<String, Integer> m = new HashMap<String, Integer>();
   Iterator<String> itr = l.iterator();
   while(itr.hasNext()) {
      String word = itr.next();
      if(m.containsKey(word)) {
         int value = m.get(word)+1;
         m.put(word, value);
      } else {
         m.put(word, 1);
      }
   }
   Iterator it = m.keySet().iterator();
   while(it.hasNext()) {
      if(m.get(it.next()) >= 3 )
         return true;
   }
   return false;
}