kotlinx-coroutines-swing/src/test/kotlin/swing-test.kt

import kotlinx.coroutines.experimental.runBlocking
import kotlinx.coroutines.experimental.swing.Swing
import java.time.Instant
import java.util.concurrent.ForkJoinPool
import kotlin.coroutines.suspendCoroutine

fun log(msg: String) = println("${Instant.now()} [${Thread.currentThread().name}] $msg")

suspend fun makeRequest(): String {
    log("Making request...")
    return suspendCoroutine { c ->
        ForkJoinPool.commonPool().execute {
            c.resume("Result of the request")
        }
    }
}

fun display(result: String) {
    log("Displaying result '$result'")
}

fun main(args: Array<String>) = runBlocking(Swing) {
    try {
        // suspend while asynchronously making request
        val result = makeRequest()
        // display result in UI, here Swing dispatcher ensures that we always stay in event dispatch thread
        display(result)
    } catch (exception: Throwable) {
        // process exception
    }
}