Synchronized singleton in Kotlin

Question

I am new to Kotlin. Still learning basic syntax. I've heard about companion objects similar to static in Java. But don't know how to create synchronized singleton in Kotlin.

Answer 1

Just use

object Singleton {
    // any members you need
}

It's already synchronized properly:

Object declaration's initialization is thread-safe.

Note that this doesn't guarantee calls on it thread-safe, but that's just as in Java.