在 Java 中创建一副纸牌时出现 ArrayIndexOutOfBoundsException

Question

我希望得到一些帮助，尽管我知道这可能是一个非常简单的错误，我似乎找不到答案。我想要完成的是创建一副纸牌，并且我将运行保持为越界错误。这是我的代码：

卡片Class:

public class Card {
    private String suit;
    private int face;

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

    public int getFace(){
        return face;
    }

    public String getFaceAsString(int face){
        int faceName = face;
        String faceString = "";
        if(faceName == 11){
            faceString = "J";
        } else if(faceName == 12){
            faceString = "Q";
        } else if(faceName == 13){
            faceString = "K";
        } else if(faceName == 14){
            faceString = "A";
        } else {
            faceString = Integer.toString(faceName);
        }

        return faceString;

    }

    public String getSuit(){
        return suit;
    }

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

 }

这是我的主class:

import java.util.Random;
import java.util.Scanner;

public class Hero_Game {

    public static void main(String[] args) {


        String[] suits = {"Spades","Clubs","Hearts","Diamonds"};
        int[] faces = {2,3,4,5,6,7,8,9,10,11,12,13,14,15};
        int index = 0;

        Card[] deck = new Card[52];

        for(int i = 0; i<suits.length;i++){
            for(int j = 0; j<faces.length;j++){
               deck[index] = new Card(faces[i],suits[j]);
               index++;
            }
        }

Answer 1

您在 for 循环中切换了 faces 和 suits 数组的索引。应该是：

for(int i = 0; i<suits.length;i++){
    for(int j = 0; j<faces.length;j++){
        deck[index] = new Card(faces[j],suits[i]);
        index++;
    }
}

Answer 2

您的 "faces" 数组中还有一个额外的数字 - 您正在尝试创建 14 * 4 = 56 张卡片而不是 13 * 4 = 52 张。

Answer 3

int[] faces = {2,3,4,5,6,7,8,9,10,11,12,13,14,15};

去掉 15 并按照@Geshode

的建议进行循环

Answer 4

为什么你有 14 张面孔而不是 13 张？

无论如何，为了更安全地在您的牌组中分配正确数量的物品，请使用 int numCardsInDeck = suits.length * faces.length; 来计算牌组中的物品总数。

试试这个：

import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

public class Game {
    public static class Card {
        final int face;
        final String suit;
        public Card(int face, String suit) {
            this.face = face;
            this.suit = suit;
        }

        @Override
        public String toString() {
            return face + " of " + suit;
        }
    }

    public static void main(String[] args) {
        String[] suits = {"Spades","Clubs","Hearts","Diamonds"};
        int[] faces = {2,3,4,5,6,7,8,9,10,11,12,13,14};
        int index = 0;

        int numCardsInDeck = suits.length * faces.length;

        Card[] deck = new Card[numCardsInDeck];

        for(int i = 0; i < suits.length; i++) {
            for(int j = 0; j < faces.length; j++) {
                deck[index] = new Card(faces[j],suits[i]);
                index++;
            }
        }

        System.out.println(Arrays.toString(deck));
    }
}

在 Java 中创建一副纸牌时出现 ArrayIndexOutOfBoundsException

ArrayIndexOutOfBoundsException When Creating Deck of Cards in Java

java

arrays

indexoutofboundsexception