Hello guys, can please someone explain me why using rxJava2 I have next situation: Using java Observable.fromArray(new String[]{"one", "two", “three”}) emit strings one by one Using kotlin Observable.fromArray(arrayOf("one", "two", “three”)) emit one element - array of strings

You should avoid using

arrayOf

and

new String[] {}

in both cases.

fromArray

takes varargs, so just call it directly with

Observable.fromArray("one", "two", "three")

in both languages.