I'm trying to run a Scala Play! project, I have jdk 9 installed. I tried to create the project both ways with the starter project and using sbt. sbt compile works fine, but sbt run throws an exception.
I downloaded the play-scala-start-example.zip from this page http://developer.lightbend.com/start/?group=play, unzip it in a folder then cd to that folder and sbt run gives me the following error:
java.lang.NumberFormatException: Not a version: 9
at scala.util.PropertiesTrait$class.parts$1(Properties.scala:176)
at scala.util.PropertiesTrait$class.isJavaAtLeast(Properties.scala:180)
at scala.util.Properties$.isJavaAtLeast(Properties.scala:16)
at play.dev.filewatch.FileWatchService$$anon$1.delegate$lzycompute(FileWatchService.scala:68)
at play.dev.filewatch.FileWatchService$$anon$1.delegate(FileWatchService.scala:66)
at play.dev.filewatch.FileWatchService$$anon$1.watch(FileWatchService.scala:79)
at play.runsupport.Reloader.<init>(Reloader.scala:359)
at play.runsupport.Reloader$.reloader$lzycompute$1(Reloader.scala:220)
at play.runsupport.Reloader$.play$runsupport$Reloader$$reloader$1(Reloader.scala:220)
at play.runsupport.Reloader$.startDevMode(Reloader.scala:230)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:77)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:77)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:63)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.lang.NumberFormatException: Not a version: 9
Solved: It is working perfectly with the jdk 1.8.0_121 I have installed some time ago.