Scala single method interface implementation

Question

Does Scala have any syntactic sugar to replace the following code:

val thread = new Thread(new Runnable {
   def run() {
     println(\"hello world\")
   }           


        

Answer 1

SAM types are supported using invokeDynamic since scala-2.12 similar to JDK-8, Below was tested on 2.12.3 - Release notes about SAM can be found here - http://www.scala-lang.org/news/2.12.0/

object ThreadApp extends App {
  println("Main thread - begins")
  val runnable: Runnable = () => println("hello world - from first thread")

  val thread = new Thread(runnable)
  println("Main thread - spins first thread")
  thread.start()

  val thread2 = new Thread(() => println("hello world - from second thread"))
  println("Main thread - spins second thread")
  thread2.start
  thread.join()
  thread2.join()

  println("Main thread - end")
}