코틀린 OTIt's a new programming language targeting the Java platform. Kotlin is concise, safe, pragmatic, and focused on interoperability with Java code.Kotlin In Action 에서 소개하고 있는 Kotlin 에 대한 예제 소스입니다.data class Person(val name: String, val age: Int? = null)// Nullable type; defult value fun main(args: Array){ val persons = listOf(Person("Alice"), Person("Bob", age = 29)) val oldset = persons.maxB..