public class BlackjackHand extends Hand {

    /**
     * Computes and returns the value of this hand in the game
     * of Blackjack.
     */
    public int getBlackjackValue() {

        int val;      // The value computed for the hand.
        boolean ace;  // This will be set to true if the
        //   hand contains an ace.
        int cards;    // Number of cards in the hand.

        val = 0;
        ace = false;
        cards = getCardCount();  // (method defined in class Hand.)

        for ( int i = 0;  i < cards;  i++ ) {
            // Add the value of the i-th card in the hand.
            Card card;    // The i-th card; 
            int cardVal;  // The blackjack value of the i-th card.
            card = getCard(i);
            cardVal = card.getValue();  // The normal value, 1 to 13.
            if (cardVal > 10) {
                cardVal = 10;   // For a Jack, Queen, or King.
            }
            if (cardVal == 1) {
                ace = true;     // There is at least one ace.
            }
            val = val + cardVal;
        }

        // Now, val is the value of the hand, counting any ace as 1.
        // If there is an ace, and if changing its value from 1 to 
        // 11 would leave the score less than or equal to 21,
        // then do so by adding the extra 10 points to val. 

        if ( ace == true  &&  val + 10 <= 21 )
            val = val + 10;

        return val;

    }  // end getBlackjackValue()

} // end class BlackjackHand