Search⌘ K
AI Features

Coroutines Builders: The launch Builder

Explore how the launch builder in Kotlin coroutines starts independent tasks without blocking threads. Understand its behavior, relationship with coroutine scope, and the importance of structured concurrency in managing coroutine lifecycles and preventing premature program termination.

We'll cover the following...

The launch builder

Conceptually, the launch works similarly to starting a new thread (thread function). We start a coroutine, which will run independently, like a firework launched into the air. This is how we use launch—to start a process.

fun main() {
   GlobalScope.launch {
       delay(1000L)
       println("World 1!")
   }
   GlobalScope.launch {
       delay(1000L)
       println("World 2!")
   }
   GlobalScope.launch {
       delay(1000L)
       println("World 3!")
   }
   println("Hello,")
   Thread.sleep(2000L)
}
launch Builder as a thread

The launch function is an extension function on the CoroutineScope interface. This is part of a vital mechanism called ...