kotlin implementation 'com.squareup.moshi:moshi:1.12.0' kotlin data class User(val name: String, val age: Int) kotlin data class User(@Json(name = "user_name") val name: String, val age: Int) kotlin val user = User("John Doe", 25) val moshi = Moshi.Builder().build() val json = moshi.adapter(User::class.java).toJson(user) kotlin val jsonString = "{\"user_name\":\"John Doe\",\"age\":25}" val user = moshi.adapter(User::class.java).fromJson(jsonString)