如何以特定编号访问字符串中的char? [英] How can i access a char in string in at specific number?

问题描述

我尝试了这段代码，但它给了我错误. 因此，如何在Kotlin中访问字符串中的字符. 在Java中，可以通过charAt()方法完成.

I tried this code but it is giving me errors. So how can i access a character in a string in kotlin. in java it can be done by charAt() method.

private fun abc(x: String) {
    var i: Int = 0
    while (x[i].toString() != "+") {
        var y: Char = x[i]
        i++
    }
}

推荐答案

等效于Java

The equivalent of Javas String.charAt() in Kotlin is String.get(). Since this is implemented as an operator, you can use [index] instead of get(index). For example

val firstChar: Char = "foo"[0]

或者，如果您愿意

val someString: String = "bar"
val firstChar: Char = someString.get(0)

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