Testing Homework - isLegalHand

    /** Determine if the given hand is legal.
        A legal hand must:
            1.Contain at least one and no more than six cards.
            2.Not contain a Joker as the only card.
            3.Not contain more than one King.
            4.Not contain more than one Ace.
            5.Not contain both a King and an Ace.
       @return integer representing which rule is violated,
       or zero if the hand is legal.
    */
    public int isLegalHand(ArrayList<Card> hand)
    {
        int result = 0;

        if (hand.size() < 1 || hand.size() > 6)
        {
            result = 1;
        }

        if (hand.size() == 1 && hand.get(0) == Card.joker)
        {
            result = 2;
        }

        int aceCount = 0;
        int kingCount = 0;
        for (Card card : hand)
        {
            if (card == Card.king)
            {
                kingCount++;
            }
            if (card == Card.ace)
            {
                aceCount++;
            }
        }

        if (aceCount > 1)
        {
            result = 3;
        }
        if (kingCount > 1)
        {
            result = 4;
        }

        if (aceCount == 1 && kingCount == 1)
        {
            result = 5;
        }

        return result;
    }

    enum Card
    {
        ace, two, three, four, five, six, seven, eight, nine, ten,
        jack, queen, king, joker
    };