Method comparator

vm/JavaAPI/src/java/util/TreeMap.java:3765–3767

Returns the comparator used to compare elements in this map. @return the comparator or null if the natural ordering is used.

()

     * @return the comparator or {@code null} if the natural ordering is used.
     */
    public Comparator<? super K> comparator() {
        return comparator;
    }

    /**
     * Returns whether this map contains the specified key.