java - 带有用户输入的标记变量以退出

Question

我有一个程序应该用java模拟扑克游戏。我有一个名为 Poker 的方法类和一个名为 CheckPoker 的支票类，它调用方法类中的方法。我什至无法检查算法部分是否有效，因为在询问用户是否愿意更换任何卡时。循环应在输入 5 张卡后退出，或者如果用户输入“1”，但在运行程序时，for 循环不会退出，直到输入 5 张卡值，然后抛出“java.lang.ArrayIndexOutOfBoundsException:Index” -1 超出长度 56"错误。我尝试过 for 循环、while 循环、do-while 循环，但到目前为止似乎都不起作用。

import java.util.*;

public class Poker {
    private String[] deck = {
            "D1","D2","D3","D4","D5","D6","D7","D8","D9","D10","DJ","DQ","DK","DA",
            "C1","C2","C3","C4","C5","C6","C7","C8","C9","C10","CJ", "CQ","CK","CA",
            "H1","H2","H3","H4","H5","H6","H7","H8","H9","H10","HJ", "HQ","HK","HA",
            "S1","S2","S3","S4","S5","S6","S7","S8","S9","S10","SJ", "SQ","SK","SA"};
    private List<String> hand = new ArrayList<>();
    public Poker(){
        Collections.shuffle(Arrays.asList(deck));
    }

    public void playGame(){
        System.out.print("The first five cards are: ");
        for(int i = 0; i<5; i++){
            System.out.print(deck[i] +", ");
        }
        System.out.println(" ");
        int k = 0;
        String j;
        List<String> discard = new ArrayList<>();
        Scanner in = new Scanner(System.in);
        System.out.println("Enter up to 5 cards you want to get rid of (1 to quit): ");
        while (k<5) { //this is the loop I'm having trouble with
            j = in.next();
            if(!j.equals("1")){
                j = in.next();
                discard.add(j);
                k++;
            }else{
                break;
            }
        }
        List deckList = Arrays.asList(deck);
        String[] discard1 = discard.toArray(new String[0]);
        for(int l = 0; l<k; l++){
            int m = deckList.indexOf(discard1[l]);
            String n = deck[m];
            deck[m] = deck[l+5];
            deck[l+5] = n;
        }
        System.out.print("Your new hand is: ");
        for(int i = 0; i<5; i++){
            System.out.print(deck[i] +", ");
            hand.add(deck[i]);
        }
        System.out.println(" ");
    }

Answer 1

尝试下面的代码。看来您每次迭代都抓取了两张卡，并且没有将它们全部捕获到 ArrayList 中。

Scanner in = new Scanner(System.in);
System.out.println("Enter up to 5 cards you want to get rid of (1 to quit): ");
while (k<5) { //this is the loop I'm having trouble with
    j = in.nextLine();
    if(j.equals("1") {
        break;
    }
    discard.add(j);
    k++;
}