Observable.just() is a hot observable and not cold observable as mentioned in the doc.

[Ansh1234]

`fun main() {
Observable.just(returnInt())
}

fun returnInt() : Int {
println("inside return block")
return 2;
}`

Even without subscribing to the Observable.just(), it prints the statement, which means it is a hot observable and not a cold observable.

[rkeazor]

Observable.just is a cold observable, because the data is produced inside the observable and closed.