I am currently working on the final touches for my SoundSphere program and unfortinately I can not seem to get the jar file to convert to a exe file with launch4j due to this error
Exception in thread "main" java.lang.UnsupportedClassVersionError: Main has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I understand it has to do with the fact that I coded this program in java 16 with fx and it can only recognize up to version 8 with the jre.
My question is how would I go about fixing this / where can I get a jre for java 16 ?
Thank you for your time and any help
Thomas Gustafson
If you do not have it already get https://adoptopenjdk.net/
If you do, i guess that you then already have jre16 as it should be part of jdk16. It seems that you have older jre installed and set as default jre. You need to change PATH in your environment variables to see java executable from jdk16 prior to jre8.
OR
You could use some JRE of 16 that has installer: https://adoptopenjdk.net/releases.html?variant=openjdk16&jvmVariant=hotspot
For example windows x64 jre16 msi installer: https://github.com/AdoptOpenJDK/openjdk16-binaries/releases/download/jdk-16.0.1%2B9/OpenJDK16U-jre_x64_windows_hotspot_16.0.1_9.msi