Example using Kotlin and Moshi

moshi-example.kt

package main

import com.squareup.moshi.JsonAdapter
import com.squareup.moshi.JsonReader
import com.squareup.moshi.Moshi
import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory

class Person(val id: Int, val name: String)

fun main() {
    val moshi: Moshi = Moshi.Builder()
            .add(KotlinJsonAdapterFactory())
            .build()

    val jsonAdapter: JsonAdapter<Person> = moshi.adapter<Person>(Person::class.java)

    // convert from json string to object
    val string = "{\"id\": 1, \"name\": \"August\"}"
    val person = jsonAdapter.lenient().fromJson(string)
    println("id=${person!!.id}, name=${person!!.name}")
    // id=1, name=August

    // convert from object to json string
    val personJson = jsonAdapter.toJson(person)
    println(personJson)
    // {"id":1,"name":"August"}
}