InvocationTargetException when installing Hypercon on Ubuntu 16.04 with open-JDK9

Hi,
I am still at the very beginning of setting up ambilight.
When I try to install Hypercon on my Ubuntu 16.04 with open-JDK9 I receive the following error and stacktrace:

java -jar ./HyperCon.jar:
[INDENT]Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: java.lang.NumberFormatException: For input string: "i"
at java.lang.NumberFormatException.forInputString(java.base@9-internal/NumberFormatException.java:65)
at java.lang.Integer.parseInt(java.base@9-internal/Integer.java:695)
at java.lang.Integer.parseInt(java.base@9-internal/Integer.java:813)
at org.hyperion.hypercon.JavaVersion.isOKJVMVersion(JavaVersion.java:20)
at org.hyperion.hypercon.Main.main(Main.java:45)
... 5 more[/INDENT]

Any ideas?

Found a solution. I followed the instructions in this link: https://ubuntuforums.org/showthread.php?t=2324490

Simply removed openjdk-9-jre and installed openjdk-8-jre instead. Seems to be some general problem with Ubuntu 16.04 and openjdk-9 when running jar files.