Java编程练习：洗牌

咸蛋超银

今天开篇做了一个洗牌练习。既然要洗牌，首先要做牌。牌主要可以拆分成：

1. 大小王各一张

String[] kings = {"BigKing", "SmallKing"};

2. 四色花色各13张

String[] colors = {"♥", "♠", "♣", "♦"};
String[] numbers = {"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"};

因为求解的内容长度是已知的，所以用for循环来做循环嵌套语句，将牌组合起来，形成54张牌。然后就开始洗牌了，要想洗牌结果是随机的，我们需要随机抽取两张牌来进行交换。

1. 随机抽取两张牌

int j = (int) (Math.random() * cards.length);
int k = (int) (Math.random() * cards.length);

2. 将其两两交换

String temp = cards[k];
cards[k] = cards[j];
cards[j] = temp;

经过上述处理，就大功告成了！结果如下：

来源：https://www.cnblogs.com/Saintwaters/p/19021284