Question

这个程序应该使用ArrayList来创建一副牌。用户输入要绘制的卡数和打印的卡，然后打印保留在卡座中的其余卡。我拿到了用户的卡片进行打印，但我无法弄清楚如何将剩余的卡片打印到卡座中。任何帮助将不胜感激。

public class Card 
{
    private int type, value;
    private String[] cardType = {"Clubs", "Spades", "Diamonds", "Hearts"};
    private String[] cardValue = {"Ace", "King", "Queen", "Jack", "10",
                                   "9", "8", "7", "6", "5", "4", "3", "2"};

    public Card(int types, int values)
    {
        type = types; 
        value = values;
    }

    public String toString()
    {
        String finalCard = cardValue[value] + " of " + cardType[type];

        return finalCard;
    }

}

import java.util.Random;
import java.util.ArrayList;

public class Deck 
{
    private ArrayList<Card> cards;

    public Deck()
    {
        cards = new ArrayList<Card>();

        for(int a =0; a<=3; a++)
        {
            for(int b =0; b<=12;b++)
            {
                cards.add(new Card(a,b));
            }
        }  
    }

    public Card drawRandomCard()
    {
        Random generator = new Random();
        int index = generator.nextInt(cards.size());
        return cards.remove(index);
    }

    public String toString()
    {
        String result = "Cards remaining in deck: " + cards;

        return result;

    }    
}


import java.util.Scanner;

public class CardProgram 
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        Card C;
        Deck deck = new Deck();

        System.out.println("Enter number of cards to be dealt: ");
        int numberCards = scan.nextInt();

        System.out.println("Cards drawn: ");
        for(int i=0; i<numberCards; i++)
        {
            C = deck.drawRandomCard();
            System.out.println(C.toString());
        }

        //C = deck.toString();
        //System.out.println(cards.toString());
       // System.out.println(C.toString());


    }

}

Answer 1

我认为这应该做你的工作

System.out.println(deck.toString());
//System.out.println(deck); // Note : this will also work

虽然我认为创建一个新方法remainingCard并返回cards ArrayList是有意义的，而不是用剩余的卡覆盖toString。

Answer 2

  for(int i=0; i<deck.cards.size(); i++)
    {
        System.out.println(deck.cards.get(i).toString());
    }

在你有一个for循环打印掉你绘制的卡后，立即试试这个循环

你在主要方法中有一个牌组......牌组有牌......你从牌组中抽出一些牌......然后你说deck.cards会给你牌组卡牌列表..然后你说.get（i）将每张牌放到那张牌中......最后.toString（）打印出牌的内容

注意：你必须在你的套牌类中公开私人数组列表，或者在套牌类中添加一个公共getter方法来获得卡片的arraylist ......

Java ArrayList Deck类

2 个答案: