CODEWITHSUNDEEP
kotlin
Emmanuel Mtali
Emmanuel Mtali

Reputation: 4963

javaClass in kotlin return unexpected type

I wanted to know the underlying java class for this

    val x: Array<Int> = arrayOf(1, 2, 3, 4, 5)
    val y: List<Int> = listOf(1, 2, 3, 4, 5)
    println(x.javaClass)
    println(y.javaClass)

The output is

class [Ljava.lang.Integer;

class java.util.Arrays$ArrayList

Can someone point out what is [Ljava.lang.Integer Am i missing something?

Upvotes: 1

Views: 48

Answers (1)

C-Shark
C-Shark

Reputation: 821

It's a valid string representation of the type of Integer[]. You are actually calling implicit toString() by println(), which calls getName(). You can find the documentation of this naming scheme here:

https://docs.oracle.com/javase/6/docs/api/java/lang/Class.html#getName()

Upvotes: 3

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