Question

我正在处理涉及数组的赋值。今天到期了，我的教授还没有回到我身边，因为它是复活节，所以真的很感激。

我遇到的麻烦是2D阵列和打印。我已经检查了有关堆栈溢出的其他问题，这些问题是类似的，并试图将它们应用到我自己的但我仍然没有得到它。

我需要做的是将我的阵列，手，打印到控制台。我已经使用for循环以及增强for循环以外的循环，以试图让它工作但无济于事。

package pokerapp;

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

public class PokerApp {

    public static void main(String[] args) {
        // TODO code application logic here
        System.out.println("Welcome to the Poker App");
        System.out.println();

        //scanner
        Scanner sc = new Scanner(System.in);
        String choice = "y";

        while (choice.equalsIgnoreCase("y")) {
        //create a deck
        Deck myDeck = new Deck();

        //shuffle cards
        myDeck.shuffleCards();
        String[][] hands = new String[4][5];

        //deal cards
        int i = 0;
        for(int k=0;k<5;k++){
            for(int j=0;j<4;j++){
                hands[j][i] = myDeck.dealCard(i);
            }
            System.out.println("Hand " + hands + ": ");
        }

        //print 5 hands with one hand on each line
        //four cards per hand
        /* output should look something like this:
        Hand 1: H4, C5, S7, H5
        Hand 2: H3, C3, S10, S11
        ...
        */





        //ask if user wants to continue
        System.out.println("Would you like to continue? Y/N?");
        choice = sc.nextLine();
        System.out.println();
       }
    } 
}

以下是我的甲板课程。

public class Deck {
    private String[] suites = {"H","D","C","S"};
    private String[] cards = new String[52];

    public Deck() {
        //create deck of cards
        int index = 0;
        //loop through the suite
        for(String suite: suites){
            //generate the ace through king
            for(int j = 1; j<14;j++){
                cards[index] = suite + j;
                index++;
            } //end of ace through king
        }//end of suites
    }//end of constructor

    public void printCardArray(){
        int index = 0;

        for(String suite : suites){
            for(int j =0; j<13;j++){
                System.out.print(cards[index] + " ");
                index++;
            }
        }
    }//end of print card array

    public void shuffleCards(){
        //execute random number 100 times
        for(int i=0;i<100;i++){
            String savedCard = "";
            int variant = ((int)(Math.random()*50)) + 1;
            for (int j = 0; j <  cards.length; j++){
               if (j + variant < cards.length){
                   savedCard = cards[j];
                   cards[j] = cards[j + variant];
                   cards[j + variant] = savedCard;
               } 
            }
        }
    }//end of shuffleCards

    public String dealCard(int index){
        return cards[index];
    } 
}

Answer 1

我需要做的是将我的阵列，手，打印到控制台。

打印数组的方法有很多，它只取决于您希望如何显示输出。

你可以这样打印你的数组：

for (String[] array : hands) {
     System.out.println(Arrays.toString(array));
}

或者这样：

for (String[] array : hands) {
   for (String str : array) {
       System.out.println(str);
   }
}

另一种方式：

System.out.println(Arrays.deepToString(hands));

Answer 2

取自原始代码

for(int k=0;k<5;k++){

    System.out.print("Hand " + k + ": ");

    for(int j=0;j<4;j++){
        hands[j][k] = myDeck.dealCard(k);
        System.out.print(hands[j][k]);

        if(j != 3) {
            System.out.print(", ");
        }
    }

    System.out.println();
}

你可以

    Hand 1: H4, C5, S7, H5
    Hand 2: H3, C3, S10, S11

有了这个。但是，如果只有hands[j][k] = myDeck.dealCard(k);返回H4, C5, S7, H5

Answer 3

我建议你研究Arrays.deepToString() Class Arrays

涉及2D数组的赋值问题

3 个答案: