java - 如何从列表中选择一个随机字符串

Question

我正在尝试创建一个程序来刺激从一副牌中挑选一张牌。我尝试使用 Random 类来选择 suit 和 rank 但我无法让它工作。到目前为止，这是我的代码。

   String[] rank = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10",  "Jack", "Queen", "King"};
   int idx = new Random().nextInt(rank.length);
   String random = (rank[idx]);

   String[] suit = {"Clubs", "Diamonds", "Hearts", "Spades"};
   int idx = new Random().nextInt(suit.length);
   String random = (suit[idx]);

   System.out.println("The card you picked is " + Arrays.toString(rank) + " of " + Arrays.toString(suit));

我确信它非常简单，但我对 Java 还比较陌生，所以非常感谢任何帮助!

Answer 1

你做对了。您只需要打印正确的变量:

String[] rank =  // ...
int rankIndex = new Random().nextInt(rank.length);
String randomRank = rank[rankIndex];

String[] suit = // ...
int suitIndex = new Random().nextInt(suit.length);
String randomSuit = suit[suitIndex];

System.out.println("The card you picked is " + randomRank + " of " + randomSuit);