从列表中获取随机字符串

Question

我正在尝试创建一个单词列表，我想随机选择一个用于String。这是我现在拥有的：

private List<String> words = new ArrayList<String>();
public void someMethod() {
    words.addAll(Arrays.asList("string1", "string2", "string3");
    for (String s : words) {
        // What now? How would I pick a random string from the list
        // Also, if I shouldn't loop through the words, please tell me
        System.out.println(randomString);
    }
}

Answer 1

您可以在0和列表大小之间生成一个随机int，然后在该索引处获取该元素。

words.addAll(Arrays.asList("string1", "string2", "string3");
String randomString = words.get(ThreadLocalRandom.current().nextInt(0, words.size()));

ThreadLocalRandom.nextInt(origin, bound)返回指定原点（包括）和指定边界（不包括）之间的伪随机int值。