How to check “instanceof ” class in kotlin?

Question

In kotlin class, I have method parameter as object (See kotlin doc here ) for class type T. As object I am passing different classes when I am calling metho

Answer 1

You can read Kotlin Documentation here https://kotlinlang.org/docs/reference/typecasts.html . We can check whether an object conforms to a given type at runtime by using the is operator or its negated form !is, for the example using is:

fun  getResult(args: T): Int {
    if (args is String){ //check if argumen is String
        return args.toString().length
    }else if (args is Int){ //check if argumen is int
        return args.hashCode().times(5)
    }
    return 0
}

then in main function i try to print and show it on terminal :

fun main() {
    val stringResult = getResult("Kotlin")
    val intResult = getResult(100)

    // TODO 2
    println(stringResult)
    println(intResult)
}

This is the output

6
500