Will the work be performed after calling the join method on Job created with collect in coroutines?

Yes, the work will be completed. In Kotlin, coroutines, when you create a Job through the collect operator (for example, in Flow), calling the join method on this Job suspends the current thread until the coroutine associated with this Job finishes.

That is, if you have a Job created as a result of collect, calling join guarantees that data collection from the Flow will finish before execution continues.

Example:

val job = CoroutineScope(Dispatchers.Default).launch {
    flowOf(1, 2, 3).collect { value ->
        println(value)
    }
}

job.join() // Wait until collect finishes
println("Data collection completed")