转换列表<整数>列出<字符串> [英] Converting List<Integer> to List<String>

问题描述

我有一个整数列表，List，我想将所有整数对象转换为字符串，从而完成一个新的List<String>代码>.

I have a list of integers, List<Integer> and I'd like to convert all the integer objects into Strings, thus finishing up with a new List<String>.

当然，我可以创建一个新的 List<String> 并循环遍历每个整数调用 String.valueOf() 的列表，但我想知道是否有一种更好的(阅读:更自动化)的方法?

Naturally, I could create a new List<String> and loop through the list calling String.valueOf() for each integer, but I was wondering if there was a better (read: more automatic) way of doing it?

推荐答案

据我所知，迭代和实例化是唯一的方法.类似的东西(对于其他人可能的帮助，因为我相信你知道如何做到这一点):

As far as I know, iterate and instantiate is the only way to do this. Something like (for others potential help, since I'm sure you know how to do this):

List<Integer> oldList = ...
/* Specify the size of the list up front to prevent resizing. */
List<String> newList = new ArrayList<>(oldList.size());
for (Integer myInt : oldList) { 
  newList.add(String.valueOf(myInt)); 
}

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