Start Hello.jar hello.HelloWindowManager
on Mac

Click on Bigger or Smaller:

[63 16ms:2ms][64 2ms:0ms]Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at com.sun.javafx.logging.PrintLogger.pulseEnd(PrintLogger.java:232)
at com.sun.javafx.logging.PulseLogger.pulseEnd(PulseLogger.java:71)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:531)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:505)
at com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$146(QuantumToolkit.java:334)
at com.sun.javafx.tk.quantum.QuantumToolkit$$Lambda$41/1876131484.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)