/**

     * Constructs a new, empty hashtable with the specified initial

     * capacity and the specified load factor.

     *

     * @param      initialCapacity   the initial capacity of the hashtable.

     * @param      loadFactor        the load factor of the hashtable.

     * @exception  IllegalArgumentException  if the initial capacity is less

     *             than zero, or if the load factor is nonpositive.

     */

    public Hashtable(int initialCapacity, float loadFactor) {

        if (initialCapacity < 0)

            throw new IllegalArgumentException("Illegal Capacity: "+

                                               initialCapacity);

        if (loadFactor <= 0 || Float.isNaN(loadFactor))

            throw new IllegalArgumentException("Illegal Load: "+loadFactor);

        if (initialCapacity==0)

            initialCapacity = 1;

        this.loadFactor = loadFactor;

        table = new Entry<?,?>[initialCapacity];

        threshold = (int)Math.min(initialCapacity * loadFactor, MAX_ARRAY_SIZE + 1);

    }

    /**

     * Constructs a new, empty hashtable with the specified initial capacity

     * and default load factor (0.75).

     *

     * @param     initialCapacity   the initial capacity of the hashtable.

     * @exception IllegalArgumentException if the initial capacity is less

     *              than zero.

     */

    public Hashtable(int initialCapacity) {

        this(initialCapacity, 0.75f);

    }

    /**

     * Constructs a new, empty hashtable with a default initial capacity (11)

     * and load factor (0.75).

     */

    public Hashtable() {

        this(11, 0.75f);

    }

    /**

     * Constructs a new hashtable with the same mappings as the given

     * Map.  The hashtable is created with an initial capacity sufficient to

     * hold the mappings in the given Map and a default load factor (0.75).

     *

     * @param t the map whose mappings are to be placed in this map.

     * @throws NullPointerException if the specified map is null.

     * @since   1.2

     */

    public Hashtable(Map<? extends K, ? extends V> t) {

        this(Math.max(2*t.size(), 11), 0.75f);

        putAll(t);

    }