如何从Java中的多个终结字符串中随机选取一个字符串？

Question

正如问题所说,我在最后一堂课中有多个决赛字符串,如下所示:

public final class MyStrings {

    public static final String stringOne = "this is string one";
    public static final String stringTwo = "this is string two";
    public static final String stringThree = "this is string three";
    public static final String stringFour = "this is string four";
    public static final String stringFive = "this is string five";

}

我知道将它们放在列表或数组中会更容易,但我想避免运行时填充这些结构.可能吗？从该类中随机选择字符串的最简单方法是什么？谢谢.

Answer 1

你String似乎非常相关,因为你有一个需要随机选择其中一个的用例.因此,无论如何它们应该被聚集在一个数组中(从语义的角度来看).

没有比当前多个字段更多的"运行时填充":

public final class MyStrings {

    public static final String[] strings = {
        "this is string one",
        "this is string two",
        "this is string three",
        "this is string four",
        "this is string five"
    };
}

然后你可以这样String随机选择一个:

Random random = new Random();
String randomString = strings[random.nextInt(strings.length)]);

Answer 2

String[] mystring = {
    "this is string one",
    "this is string two",
    "this is string three",
    "this is string four",
    "this is string five"
};

int idx = new Random().nextInt(mystring.length);
String random = (mystring [idx]);