Object serialization: Difference between revisions

=={{header|Kotlin}}==

{{trans|Java}}

<lang scala>// version 1.2.0

import java.io.*

open class Entity(val name: String = "Entity"): Serializable {

override fun toString() = name

companion object {

val serialVersionUID = 3504465751164822571L

}

}

class Person(name: String = "Brian"): Entity(name), Serializable {

companion object {

val serialVersionUID = -9170445713373959735L

}

}

fun main(args: Array<String>) {

val instance1 = Person()

println(instance1)

val instance2 = Entity()

println(instance2)

// serialize

try {

val out = ObjectOutputStream(FileOutputStream("objects.dat"))

out.writeObject(instance1)

out.writeObject(instance2)

out.close()

println("Serialized...")

}

catch (e: IOException) {

println("Error occurred whilst serializing")

System.exit(1)

}

// deserialize

try {

val inp = ObjectInputStream(FileInputStream("objects.dat"))

val readObject1 = inp.readObject()

val readObject2 = inp.readObject()

inp.close()

println("Deserialized...")

println(readObject1)

println(readObject2)

}

catch (e: IOException) {

println("Error occurred whilst deserializing")

System.exit(1)

}

catch (e: ClassNotFoundException) {

println("Unknown class for deserialized object")

System.exit(1)

}

}</lang>

{{out}}

<pre>

Brian

Entity

Serialized...

Deserialized...

Brian

Entity

</pre>