min mit explizitem Komparator

public static <T> 
T min (Collection<? extends T> coll, 
       Comparator<? super T> comp) {
   Iterator<? extends T> i = coll.iterator();
   T candidate = i.next();
   while(i.hasNext()) {
       T next = i.next();
       if (comp.compare(next, candidate) < 0)
           candidate = next;
   }
   return candidate;
}