User.kt

data class User @JvmOverloads constructor(
    var name: String,
    var age: Int,
    var address: String = "",
    var gender: String
) {
    companion object {
        val TAG = User::class.java.name
        
        fun createUser(name: String, age: Int, address: String = "", gender: String): User {
            return User(name, age, address, gender)
        }
    }
}