It doesn't matter "who did the trick". It is well known that Java was influenced by ideas in other programming languages from the beginning. And also other lang

It doesn't matter "who did the trick". It is well known that Java was influenced by ideas in other programming languages from the beginning. And also other languages - including Scala and Kotlin - are similar in this respect... So yes: Kotlin influenced Java and Java influenced Kotlin. Let's compare final products with final products and not "how did we get there"...