如何将 Char 转换为 Int? [英] How do I convert a Char to Int?

问题描述

所以我有一个 String 看起来像 "82389235" 的整数，但我想遍历它以将每个数字单独添加到 MutableList.但是，当我按照我认为的处理方式进行处理时:

So I have a String of integers that looks like "82389235", but I wanted to iterate through it to add each number individually to a MutableList. However, when I go about it the way I think it would be handled:

var text = "82389235"

for (num in text) numbers.add(num.toInt())

这会将与字符串完全无关的数字添加到列表中.然而，如果我使用 println 将它输出到控制台，它会完美地遍历字符串.

This adds numbers completely unrelated to the string to the list. Yet, if I use println to output it to the console it iterates through the string perfectly fine.

如何正确地将 Char 转换为 Int?

How do I properly convert a Char to an Int?

推荐答案

那是因为 num 是一个 Char，即结果值是那个字符的 ascii 值.

That's because num is a Char, i.e. the resulting values are the ascii value of that char.

这样做就行了:

val txt = "82389235"
val numbers = txt.map { it.toString().toInt() }

map 可以进一步简化:

map(Character::getNumericValue)

这篇关于如何将 Char 转换为 Int?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！