[hardwired]

Code:

import java.util.*;

public class CardDrawer {
    Card[] cards;
    Random seed = new Random();
    List<Card> cardsDrawn = new ArrayList<Card>();
    boolean drawOnce = false;

    CardDrawer(boolean drawOnce) {
        this();
        this.drawOnce = drawOnce;
    }

    CardDrawer() {
        initCards(1, 14);
    }

    CardDrawer(int low, int high, boolean drawOnce) {
        this(low, high);
        this.drawOnce = drawOnce;
    }

    CardDrawer(int low, int high) {
        initCards(low, high);
    }

    public Card drawCard() {
        return getCard();
    }

    public Card[] drawCard(int n) {
        Card[] draws = new Card[n];
        for(int j = 0; j < n; j++) {
            draws[j] = getCard();
        }
        return draws;
    }

    private Card getCard() {
        Card card;
        boolean drawAgain = true;
        do {
            card = cards[seed.nextInt(cards.length)];
            drawAgain = drawOnce ? cardsDrawn.contains(card)
                                 :  false;
        } while(drawAgain);
        if(drawOnce)
            cardsDrawn.add(card);
        return card;
    }

    private void initCards(int low, int high) {
        String[] faces = { "jack", "queen", "king", "ace" };
        String[] suits = { "spades", "hearts", "clubs", "diamonds" };
        int len = high - low + 1;
        cards = new Card[4*len];
        int count = 0;
        for(int j = 0; j < len; j++) {
            for(int k = 0; k < suits.length; k++) {
                cards[count++] = new Card(low+j, suits[k]);
            }
        }
    }

    /** Test this class. */
    public static void main(String[] args) {
        CardDrawer cd1 = new CardDrawer();
        Card[] cards = cd1.drawCard(5);
        System.out.printf("cd1 cards = %s%n", Arrays.toString(cards));
        CardDrawer cd2 = new CardDrawer(10, 14, true);
        cards = cd2.drawCard(5);
        System.out.printf("cd2 cards = %s%n", Arrays.toString(cards));
        System.out.println("-------------");
        CardDrawer cd3 = new CardDrawer(false);
        cards = cd3.drawCard(20);
        System.out.println("cd3 card duplicates:");
        Card[] uniqueCards = getUniqueCards(cards);
        List<Card> cardList = new ArrayList<Card>(Arrays.asList(cards));
        for(int j = 0; j < uniqueCards.length; j++) {
            int freq = Collections.frequency(cardList, uniqueCards[j]);
            if(freq > 1)
                System.out.println(uniqueCards[j] + " occurs " +
                                   freq + " times");
        }
        System.out.println("-------------");
        System.out.println("cardList = " + cardList);
    }

    private static Card[] getUniqueCards(Card[] cards) {
        List<Card> list = new ArrayList<Card>();
        for(int j = 0; j < cards.length; j++) {
            if(!list.contains(cards[j]))
                list.add(cards[j]);
        }
        return list.toArray(new Card[list.size()]);
    }
}

class Card {
    int value;
    String suit;

    Card(int value, String suit) {
        this.value = value;
        this.suit = suit;
    }

    public String toString() {
        String[] vals = { "jack", "queen", "king", "ace" };
        String s;
        if(value > 10)
            s = vals[value-11];
        else
            s = String.valueOf(value);
        return s + " of " + suit;
    }
}