kotlin getSerializable

To make a class serializable in Kotlin, you need to implement the `Serializable` interface. Here's an example:

import java.io.Serializable

data class Person(val name: String, val age: Int): Serializable

fun main() {
    val person = Person("John", 30)

    // Serialization
    val outputStream = FileOutputStream("person.ser")
    val objectOutputStream = ObjectOutputStream(outputStream)
    objectOutputStream.writeObject(person)
    objectOutputStream.close()
    outputStream.close()

    // Deserialization
    val inputStream = FileInputStream("person.ser")
    val objectInputStream = ObjectInputStream(inputStream)
    val deserializedPerson = objectInputStream.readObject() as Person
    objectInputStream.close()
    inputStream.close()

    println(deserializedPerson)
}

In this example, the `Person` class implements the `Serializable` interface. We then serialize an instance of the `Person` class into a file called "person.ser". Afterward, we deserialize the object from the file and print it out. Note that the serialization and deserialization process requires handling exceptions, but they are omitted here for brevity.