Learning Concurrency in Kotlin

Using a specific dispatcher when starting the coroutine

So far, we have seen how to create coroutines using async() and launch(), but in both cases we were using the default dispatcher. Consider the following code:

fun main(args: Array<String>) = runBlocking {  val task = launch {    printCurrentThread()  }  task.join()}

Here, printCurrentThread(), as its name suggests, will just print the name of the current thread to the standard output:

fun printCurrentThread() {  println("Running in thread [${Thread.currentThread().name}]")}

By running this code, we see that by default the coroutine will run in DefaultDispatcher, which as the time of writing is the same dispatcher as CommonPool – but be aware that this could change in the future.

If we update ...