洗牌喽

思想：52张牌（不考虑大小王）cards数组存储，0-12, 13-25, 26-38, 39-51 分别为红心，方块，梅花，黑桃

   用电脑随机生成数来交换牌的位置

public class remixcards {public static void main(String[] args) {final int N = 52;String [] cardColors = {"红心","方块","梅花","黑桃"};String [] cardValuas = {"A","2","3","4","5","6","7","8","9","10","J","Q","k"};//52张牌int [] cards = new int[52];for(int i = 0; i < cards.length; i++){cards[i] = i;//牌面与循环变量的值一致，0-51之间}System.out.println("洗牌前：");for(int i = 0; i < cards.length; i++){System.out.printf("%s-%s",cardColors[cards[i]/13], cardValuas[cards[i]%13]);if((i+1) % 13 == 0){System.out.println();}else{System.out.print("\t");}}//洗牌：随机生成一个0-51之间的数字newIndex,交换cards[i]与cards[newIndex]的元素for(int i = 0; i < cards.length; i++){int newIndex = (int)(Math.random() * N);//0-51之间的随机数字int temp = cards[i];cards[i] = cards[newIndex];cards[newIndex] = temp;}System.out.println("洗牌后：");for(int i = 0; i < cards.length; i++){System.out.printf("%s-%s",cardColors[cards[i]/13], cardValuas[cards[i]%13]);if((i+1) % 13 == 0){System.out.println();}else{System.out.print("\t");}}}}