java - 如何使用java中的基本switch方法洗牌

Question

我现在正在创建卡牌游戏的基础，我只是为卡牌做一些基本功能。我想洗牌，但不知道如何编写它的函数。它将在主程序中调用，这是我迄今为止拥有的套牌类:

    import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*  ;      //capture mouse events
    import java.awt.Graphics ;
    import java.awt.Event;
    import java.util.Random;

    public class Deck 
    {
        private  Random random = new Random (); 
        protected Card cards[] = new Card[52] ; 

        protected int numcards = 0; 

        public Deck()
        {
            int i = 0; 
            for (int s = 1; s<5 ; s++)
            {
                for (int n=1; n<14 ; n++)
                {
                    cards[i] = new Card(n,s);
                    i++; 
                    numcards =  numcards + 1; 
                }
            }

        }

        public void giveCard(Deck p) 
        {
             numcards =  numcards - 1; 
             p.takeCard(cards[numcards]); 
             return;  
        }

        public void takeCard(Card c)
        {
            cards[numcards] = c;
            numcards = numcards + 1;

        }

        public void shuffle ()
        {
             int temp;  
             for (int i = 0; i<52; i++)
             {
                 //cards[i] = temp ; 
             }
        }

        public void draw (Container c ,Graphics g, int x , int y  )
        {
            for (int i = 0; i<numcards; i++)
            {
                 cards[i].draw(c, g, x+i*20,y) ; 
            }

        }

    }

Answer 1

如果您更改 Card[]进入List<Card>相反，您可以简单地使用 Collections.shuffle(cards) 。否则，循环遍历数组，在每个点将当前卡与随机选择的卡交换。