En lille bug?

Hej.

Jeg er ved at skrive en poker program. Jeg har en enkelt bug der har plaget mig noget. Her følger kildekoden til det mest relevante:

/*
* Player.java
*/

package pokertexasholdem;
import java.util.*;
import java.lang.Integer;
/**
* Player class
* Manage the the players name, cards and money
*/
public class Player {
    private String name; 
    private int money; 
    private ArrayList<Card> handCards; 
    private ArrayList<Card> availableCards;
   
    /** Creates a new instance of Player
    * @param name
    * @param money
    */
    /** Creates a new instance of Player */
    public Player(String name, int money) {
        name = name;
        money = money;
        // handCards manage a list of the 2 cards on the players hand
        handCards = new ArrayList<Card>(2);
        availableCards = new ArrayList<Card>(7);
    }

    /** Add a card to the players hand
    * @param cardToAdd the card object to add
    */ 
    public void addCard(Card cardToAdd) {
        handCards.add(cardToAdd);
    }
 
    /** Get a list of the players available cards (hand+community)
    * @return a array with the players available cards
    */
    public ArrayList<Card> availableCards() {
        // combines the handCards array (from the player class) and the CommunityCards array (from the dealer class).
        availableCards.addAll(Dealer.getCommunityCards()); // HER ER DER PROBLEMER!!
        availableCards.addAll(handCards);
        return(availableCards);
    }
   
}




/*
* Dealer.java
*/

package pokertexasholdem;
import java.util.ArrayList;

public class Dealer {
    private static CommunityCards cCards;
   
    /** Creates a new instance of Dealer */
    public Dealer() {
        CommunityCards cCards = new CommunityCards();
             
        Card card1 = new Card("hearts", 1);
        Card card2 = new Card("hearts", 2);
        Card card3 = new Card("hearts", 10);
        Card card4 = new Card("hearts", 11);
        Card card5 = new Card("hearts", 12);
        Card card6 = new Card("hearts", 13);
        Card card7 = new Card("hearts", 14);
               
        cCards.addCard(card1);
        cCards.addCard(card2);
        cCards.addCard(card3);
        cCards.addCard(card4);
        cCards.addCard(card5);
       
    dialog.Print("Comm cards: "+cCards.getList().toString());
       
        // opret kort hos player
        Player player1 = new Player("Peter", 100);
        player1.addCard(card6);
        player1.addCard(card7);
        ArrayList p1 = player1.availableCards();
        dialog.Print("alle korts mulige for player 1: "+p1.toString());
    }
   
    /** Get a list of the community cards
    * @return an array with the community cards
    */
    public static ArrayList<Card> getCommunityCards() {
        return cCards.getList();
    }
}







/*
* CommunityCards.java
*/

package pokertexasholdem;
import java.util.ArrayList;
/**
* CommunityCards class
* Manage the community cards
*/
public class CommunityCards {
    private ArrayList<Card> cardList;

    /** Creates a new instance of CommunityCards */
    public CommunityCards() {
        // cardList manage a list of the 5 community cards
        cardList = new ArrayList<Card>(5);
    }
   
    /** Add a card to the community cards
    * @param cardToAdd the card object to add
    */ 
    public void addCard(Card cardToAdd) {
        cardList.add(cardToAdd);
    }
   
    /** Get a list of community cards
    * @return a array list with the community cards
    */
    public ArrayList<Card> getList() {   
        return(cardList);
    }
}





Det var lige de indvoldverede klasser skåret ned til det nødvendige. Card klassen er blot en kort klasse.

Fejlen kommer i player klassen i linjen:
availableCards.addAll(Dealer.getCommunityCards()); // HER ER DER PROBLEMER!!

Det er som om referencen Dealer.getComminityCards ikke virker. Udkommenter man denne linje er der ingen problemer. Kompileren er ikke til meget hjælp:

run:
Welcome to Texas Hold'em
Comm cards: [pokertexasholdem.Card@1820dda, pokertexasholdem.Card@15b7986, pokertexasholdem.Card@87816d, pokertexasholdem.Card@422ede, pokertexasholdem.Card@112f614]
Exception in thread "main" java.lang.NullPointerException
        at pokertexasholdem.Dealer.getCommunityCards(Dealer.java:51)
        at pokertexasholdem.Player.availableCards(Player.java:49)
        at pokertexasholdem.Dealer.<init>(Dealer.java:42)
        at pokertexasholdem.TexasHoldemPoker.main(TexasHoldemPoker.java:27)
Java Result: 1

Som det kan ses er den ikke til nogen hjælp. Fejlen ligger i den der reference, som nævnt.

Er der nogen der har et bud?