Как я могу отобразить свою колоду? Он продолжает говорить null

Question

Некоторая помощь нужна здесь. Как я могу получить колоду для отображения. Кажется, они не отображаются. Продолжает говорить, что Card имеет значение null. Используя файл Main для вызова метода displayDeck.

public class deck { 
public Card[] deck; 

public void CreateDeck(){ 
    Card[] deck = new Card[52]; 
    String[] suit = {"Spades", "Hearts", "Diamonds", "Clubs"}; 
    int[] number = {1,2, 3, 4, 5, 6, 7, 8, 9, 10,11,12,13}; 

    deck[0] = new Card("Spades",1); 
    deck[1] = new Card("Spades",2); 
    deck[2] = new Card("Spades",3); 
    deck[3] = new Card("Spades",4); 
    deck[4] = new Card("Spades",5); 
    deck[5] = new Card("Spades",6); 
    deck[6] = new Card("Spades",7); 
    deck[7] = new Card("Spades",8); 
    deck[8] = new Card("Spades",9); 
    deck[9] = new Card("Spades",10); 
    deck[10] = new Card("Spades",11); 
    deck[11] = new Card("Spades",12); 
    deck[12] = new Card("Spades",13); 



    deck[13] = new Card("Clubs",1); 
    deck[14] = new Card("Clubs",2); 
    deck[15] = new Card("Clubs",3); 
    deck[16] = new Card("Clubs",4); 
    deck[17] = new Card("Clubs",5); 
    deck[18] = new Card("Clubs",6); 
    deck[19] = new Card("Clubs",7); 
    deck[20] = new Card("Clubs",8); 
    deck[21] = new Card("Clubs",9); 
    deck[22] = new Card("Clubs",10); 
    deck[23] = new Card("Clubs",11); 
    deck[24] = new Card("Clubs",12); 
    deck[25] = new Card("Clubs",13); 


    deck[26] = new Card("Heart",1); 
    deck[27] = new Card("Heart",2); 
    deck[28] = new Card("Heart",3); 
    deck[29] = new Card("Heart",4); 
    deck[30] = new Card("Heart",5); 
    deck[31] = new Card("Heart",6); 
    deck[32] = new Card("Heart",7); 
    deck[33] = new Card("Heart",8); 
    deck[34] = new Card("Heart",9); 
    deck[35] = new Card("Heart",10); 
    deck[36] = new Card("Heart",11); 
    deck[37] = new Card("Heart",12); 
    deck[38] = new Card("Heart",13); 

    deck[39] = new Card("Diamonds",1); 
    deck[40] = new Card("Diamonds",2); 
    deck[41] = new Card("Diamonds",3); 
    deck[42] = new Card("Diamonds",4); 
    deck[43] = new Card("Diamonds",5); 
    deck[44] = new Card("Diamonds",6); 
    deck[45] = new Card("Diamonds",7); 
    deck[46] = new Card("Diamonds",8); 
    deck[47] = new Card("Diamonds",9); 
    deck[48] = new Card("Diamonds",10); 
    deck[49] = new Card("Diamonds",11); 
    deck[50] = new Card("Diamonds",12); 
    deck[51] = new Card("Diamonds",13); 

} 
public void displayDeck(){ 
    for (int i =0;i<=50;i++){ 
     System.out.println("Card " + (i+1)+ " is: " + deck)// display deck; 
    } 
} 

} 

Answer 1

Вы переопределяете свою «колоду» переменной в своем конструкторе вместо использования своего публичного имущества.

public void CreateDeck(){ 
    //Before 
    //Card[] deck = new Card[52]; 

    //Correction 
    deck = new Card[52]; 

    String[] suit = {"Spades", "Hearts", "Diamonds", "Clubs"}; 
    int[] number = {1,2, 3, 4, 5, 6, 7, 8, 9, 10,11,12,13}; 

    deck[0] = new Card("Spades",1); 
    deck[1] = new Card("Spades",2); 
    deck[2] = new Card("Spades",3); 
    deck[3] = new Card("Spades",4); 

    ... 
}