JavaFX example using Kotlin coroutines, blocking version

Blocking.kt

import javafx.application.Application
import javafx.embed.swing.SwingFXUtils
import javafx.scene.Scene
import javafx.scene.control.Button
import javafx.scene.image.ImageView
import javafx.scene.layout.StackPane
import javafx.stage.Stage
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.withContext
import java.awt.image.BufferedImage
import javax.imageio.ImageIO

class Blocking : Application() {
	override fun start(primaryStage: Stage) {
		val imageView = ImageView().apply {
			isPreserveRatio = true
			isSmooth = true
			fitWidth = 300.0
			fitHeight = 300.0
		}

		val image = runBlocking {
			getIcon()
		}
		imageView.image = SwingFXUtils.toFXImage(image, null)

		val button = Button().apply {
			graphic = imageView
		}

		val root = StackPane()
		root.children.add(button)
		primaryStage.scene = Scene(root, 300.0, 300.0)
		primaryStage.show()
	}

	private suspend fun getIcon(): BufferedImage = withContext(Dispatchers.IO) {
		println("Reading an image from thread ${Thread.currentThread().name}")
		this@Blocking.javaClass.getResourceAsStream("logo1.png").buffered().use {
			ImageIO.read(it)
		}
	}

	private companion object {
		@JvmStatic
		fun main(vararg args: String) {
			Application.launch(Blocking::class.java, *args)
		}
	}
}