Check class type of two vars

Support
1

Hi everyone.

I would like to know if there is a way to do something like this:

var a: Any → get the value somewhere
var b: String = “Hello”

a::class.java is b::class.java

Actually, the only thing I can do is:

a::class.java is String

Thanks, Giovanni

2

a::class == b::class

3

@darksnake
That still won’t work at compile time.

Normally, you wouldn’t be able to do that because you already know both types so you always know it’s not true. However, a dynamic approach would be to simply do

a::class.java.isInstance(b::class.java)

4

Sorry. the example I did wasn’t so much correct.

I’ll provide to correct it now

5

It will give IDE warning. As for your sample, it checks subtyping, not equality. Also you can do it with KClass, without .java call.

6

a::class == b::class

is not the same check as

a is b

one is equality, the other is conformity

7

I tried all your response but none of them works.

I think the main problem is thath I’m checking the class type of an Any object with the class type of a var

8

Ok, I’ve got it.

Property to cast an Any obj to T obj:

fun Any.castTo(c: Class): T {
return this as T
}

Example:

a : Any
b : String

and then I check if a is b in this way :

if ( a.toObj(b::class.java)::class == b::class) {
//Stuff with a as String
}

Hope it will be usefull to other people