Java：转换List< Integer>的最佳方法到List< String> [英] Java: Best way of converting List<Integer> to List<String>

问题描述

我有一个整数列表， List< Integer> ，我想将所有的整数对象转换为字符串，从而结束一个新的 List< String> 。

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，但我想知道是否有更好的（读： / em>）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。有些事情（对于其他潜在的帮助，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<String>(oldList.size()) 
for (Integer myInt : oldList) { 
  newList.add(String.valueOf(myInt)); 
}

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