Question

How to pass a runnable procedure (a function) as a parameter and run it in Kotlin

Answer 1

fun main() {
    val runnable = Runnable { task() }
    Thread(runnable).start()
}

fun task() {
    println("Task is running!")
}


 
/*
run:
 
Task is running!
 
*/

 

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Answer 2

fun main() {
    // Using Function Reference
    val runnable = Runnable(::task)
    Thread(runnable).start()
}

fun task() {
    println("Task is running!")
}


 
/*
run:
 
Task is running!
 
*/

 

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Answer 3

fun main() {
    runTask(::customTask)
}

fun runTask(task: () -> Unit) {
    val runnable = Runnable(task)
    Thread(runnable).start()
}

fun customTask() {
    println("Custom task is running!")
}



 
/*
run:
 
Custom task is running! 
 
*/

 

70+ SQL courses for beginners and professionals