Method lastKey

lib/java/util/TreeMap.java:1403–1409

Returns the last key in this map. @return the last key in this map. @throws NoSuchElementException if this map is empty.

()

     *             if this map is empty.
     */
    public K lastKey() {
        if (root != null) {
            Node<K, V> node = maximum(root);
            return node.keys[node.right_idx];
        }
        throw new NoSuchElementException();
    }

    static <K,V> Node<K, V> minimum(Node<K, V> x) {
        if (x == null) {