gson usage

gson.kt

fun main(args: Array<String>) {

    val gson = GsonBuilder().setPrettyPrinting().create()
    val person = Person("Kolineer", 27, listOf("I am Kotlin Learner", "At Kotlination"))

    // to json
    val jsonPerson: String = gson.toJson(person)
    println(jsonPerson)

    // from json
    val person1:Person=gson.fromJson(jsonPerson, Person::class.java)
    println(person1)
    
    val typeToken = object : TypeToken<List<String>>() {}.type
    val strings = gson.fromJson(json, typeToken) as List<String>
}

data class Person(val name: String, val age: Int, val messages: List<String>) {
}