Kotlin 函数用于获取子字符串的开始和结束索引 [英] Kotlin function for getting start and end index of substring

问题描述

我想知道是否有一些方法或方法组合可以获得这些结果.

I'm wondering is there some method or methods combo that could obtain these results.

我的意思是你有一个字符串 ex.Hello world，你好吗?"我想实现以下功能，以获取子字符串的开始和结束索引在那个字符串中.

What I meant is that you have a string ex. "Hello world, how are you?" And I want to achieve following functionality, to get start and end index of substring in that string.

例如.substring = "world"，起始索引为 6，结束索引为 10

ex. substring = "world", and start index would be 6, and end index 10

标准的 kotlin 库中是否有类似的东西?

Is there something like this in standard kotlin libraries?

推荐答案

类似的事情?

val s = "Hi there"
val substringToFind = "there"

val start = s.indexOf(substringToFind)
val end = start + substringToFind.length

println(s.substring(start,end))

输出:那里

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