Hi, I've two data class as follows: data class Resource( val location : String, val address: String ) data class Student( val id : Int, var userName : String, var screenName : String, var email : String, var place : Resource, var register : Instant, val timezone : TimeZone ) How to add some sample data to 'Resource' ?

Sample data as in default? If that is the case

data class Resource( val loaction: String = "::data::" ...etc)

You can also have a constructor with default values

data class Resource(val location : String, val address: String) {
       constructor(location : String): this(location, "random addreess") { ..... }
       constructor(address : String): this("Random Location", address) { ..... }
}