Classs Instance Via Factory

ClassInstanceViaFactory.kt

fun interface Factory<T> {
    fun create(): T
}

fun <T> createInstance(factory: Factory<T>): T {
    return factory.create()
}

fun main() {
    val instance = createInstance(Factory {
        return@Factory FirstClass(SecondClass())
    })
    instance.callSecondClassMethod()
}

class FirstClass(
    private val secondClass: SecondClass
) {
    fun callSecondClassMethod() {
        secondClass.doWork()
    }
}

class SecondClass {
    fun doWork() {
        for (i in 1..10) {
            println(Random.nextInt(1, 10))
        }
    }
}