Is it possible to call a Scala function from Kotlin?

Question

I am working on a project which involves Kotlin, Java, and Scala at the same time. In a scenario, I need to execute a Scala function from Kotlin. How can I do it?

Answer 1

The same way you normally execute functions in Kotlin.

Just compile Scala code to bytecode and add it to Kotlin classpath.

Example:

In folder <classpathFolder> put:

ScaTest.scala :

class ScaTest() {
    import math._
    def mathFunction(num: Int) = {
        val numSquare = num*num
        (cbrt(numSquare) + log(numSquare)).toInt
    }
}

Compile with scalac ScaTest.scala

It should produce file ScaTest.class

In some other folder create Kotlin file:

KotTest.kt :

fun main() {
    val ss = ScaTest()
    println(ss.mathFunction(4))
}

Compile with kotlinc -classpath <classpathFolder> KotTest.kt

This should produce file KotTestKt.class

Run with kotlin -classpath <classpathFolder> KotTestKt