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I have some code that I've been using for years in Java, but need it in Kotlin (its interfaces extend collections interfaces). Some classes are serializable. When I try the obvious, I get "Cannot access 'Serializable': it is internal in kotlin.io":
class Foo(val someField:Int): Serializable {
companion object {
private const val serialVersionUID = 20180617104400L
}
}
So, do I just import java.io.Serializable, or will that cause other issues?
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Kotlin Serialization supports multiple formats, including JSON and Protocol Buffers. In this example, we'll continue with JSON. In order to read and write your data class to JSON using Kotlin serialization, you need to annotate your data class with @Serializable and override the Serializer's writeTo() and readFrom() .
Serialization in Java allows us to convert an Object to stream that we can send over the network or save it as file or store in DB for later usage. Deserialization is the process of converting Object stream to actual Java Object to be used in our program.
do I just import java.io.Serializable
Yes. Just be aware that Kotlin uses @Transient annotation instead of a keyword.
Of course, Java serialization does have its issues, but there's no difference in that respect between Kotlin and Java, and if you are happy with your current code...
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