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I don't know why this emits immediately not after 30seconds
anyone know, What is I am missing here? ??


```Observable<Integer> ob = Observable.timer(30,TimeUnit.SECONDS).just(1);

        ob.subscribe(n-> System.out.println(n));```

This is a Kotlin Slack, so I think the most important thing you’re missing is Kotlin.

`Observable.just` is static, so :

• Your statement doesn’t compile in Kotlin
• There is a warning in java that explains the problem

`Observable.timer` emits `0L` and completes, so if you need a 1, you can :

• `Observable.timer` and then `map` the 0 to 1
• `Observable.just` 1 and `delay` the emission