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kotlinlang

Do creation of Singleton has been changed now?

object MySingleton {
val num:Int = 10
}

No longer create a private constructor

It's an explicit implementation of `Item 3: Enforce the singleton property with a private constructor or an enum type`  from Joshua Bloch's Effective Java book.  It makes it impossible for the developer to f***-up the definition of a Singleton

It uses the same approach of Singletons &amp; Companion Objects as Scala:scala:

I think I misunderstood...I thought there was now a non-private constructor but still is private when trying to call from Java

It's a change coming from Java but this approach has been in Kotlin since before 1.0

Yep, if you have a look at the generated byte code it is still implemented as a private constructor

I know, I was confused because I don't see a private constructor in the decompiled Java code...but in the bytecode it's there, you're right