Kotlin data class cannot init attribute of Parent class

Question

like this:

open class Father(
        val name:String = ""
)

data class Son(
        val age:Int = 1
):Father()

fun main(args: Array<String>) {
    val son = Son(
            name = "",
            age = 10
    )
}

I cannot init "name" attribute of Son because of it is from Parent Class Father. How can I fix this?

Sasi Kumar · Accepted Answer · 2019-10-16 05:15:43Z

2

It should be

open class Father(open val name: String="")

data class Son(val age: Int = 1,
override val name: String    ) : Father(name)

fun main(args: Array<String>) {
val son = Son(name = "",age = 10)
}

answered Oct 16, 2019 at 5:15

Sasi Kumar

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2 Comments

HarrisonQi Over a year ago

but there's too many classes like 'Son', this way make so many duplicate code....

gidds Over a year ago

Why do you need to override name in Son? It should work (more simply) without the override val, simply passing the parameter up to the superclass constructor.

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