遍历数组并打印每个对象

Question

我的数组正在加载，并且正在按计划（按照它们在文件中出现的顺序）将卡打印出来。当我尝试在单独的方法中循环遍历arraylist以检查数据是否存在时，它只打印最后一个对象而不是每个对象。有人能告诉我为什么吗？

加载法

public class
    TestFrame {

//VARIABLES
private static Deck deck;
private static Card card;
private static Scanner scan;
private final static String fileName = "cards.txt";
static ArrayList<Card> cards = new ArrayList<>();

private static void Load(){

    deck = new Deck();
    card = new Card();

    // Load in the card file so that we can work with the data from cards.txt internally rather than from the file constantly.

    try(FileReader fr = new FileReader(fileName);
            BufferedReader br = new BufferedReader(fr);
            Scanner infile = new Scanner(br)){

        int numOfCards = infile.nextInt();
        infile.nextLine(); // Do we need this? Yes we do. Illuminati confirmed.
        for(int i=0; i < numOfCards; i++){
            String value = infile.nextLine();
            String suit = infile.nextLine();
            Card newCard = new Card(value, suit);
            card.addCard(newCard);
            System.out.print(newCard.getValue());
            System.out.print(newCard.getSuit());
            System.out.println(" ");
            //Print out the object before cycling through again so we can see if it's working
            //We can use this to add then cards to the shuffle array at a later date
        }

    }

ah 
2h 
3h 
4h 
5h 
6h 
7h 
8h 

private static void displayAllCards(){
    Card[] cards = Card.getAll();
    for(Card c : cards){
        System.out.print(Card.getValue());
        System.out.print(Card.getSuit());
        System.out.println(" ");
    }
}

和getAll（）方法

public static Card[] getAll(){
    Card[] brb = new Card[cards.size()];
    int tempCount = -1;
    for(Card c : cards){
        tempCount++;
        brb[tempCount] = c;
    }
    return brb;
}

运行getAll()时，它只打印出.txt文件中的最后一张牌“KS”（黑桃之王）。有人能告诉我为什么会这样吗？

谢谢

package uk.ac.aber.dcs.cs12320.cards;

import java.util.ArrayList;


public class Card {

protected static String value;
protected static String suit;
static ArrayList<Card> cardsList = new ArrayList<>();

public Card(String v, String s){
    this.value = v;
    this.suit = s;
}

public Card() {

}

public static Card[] getAll(){
    Card[] brb = new Card[cardsList.size()];
    int tempCount = -1;
    for(Card c : cardsList){
        tempCount++;
        brb[tempCount] = c;
    }
    return brb;
}

public static void deleteAll(){
    cardsList.clear();
}

public static String getValue() {
    return value;
}

public void setValue(String value) {
    Deck.value = value;
}

public static String getSuit() {
    return suit;
}

public void setSuit(String suit) {
    Deck.suit = suit;
}

public void addCard(Card card){
    cardsList.add(card);
}

}

Answer 1

card.addCard(newCard);

我认为这应该是cards.addcard(newCard)；