从 ArrayList 中获取随机值 [英] Getting random values from an ArrayList

问题描述

我有一个 String 数组:

String [] array={"1","2","3","4","5","6","7","8","9"};

我将其转换为数组列表:

Which I convert into an array list:

 ArrayList<String> al = new ArrayList<String>(Arrays.asList(array));

我想从我的 ArrayList 中获取一个随机值.

I want to get a random value from my ArrayList.

推荐答案

使用 Random 类来做到这一点，方法 nextInt 的参数是随机数的绑定到被退回.它必须是正数:

Use Random class to do that, argument of method nextInt is the bound on the random number to be returned. It must be positive:

Random random = new Random();
yourList.get(random.nextInt(yourList.size()));

这篇关于从 ArrayList 中获取随机值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！