I am having trouble getting Minecraft 18.0 to run on my Mac server. When I try to start the server I get the error message shown below.
Error: LinkageError occurred while loading main class net.minecraft.bundler.Main java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 60.0 I was getting that same error when I had Java 8u311 installed.
My problem is that I have downloaded and installed jdk-17.0.1 as suggested in another post here and I am still getting this error. I tried powering down and doing a restart of the server computer after installing Java 17 to make sure there were no leftover parts or pieces the might interfere. But I still get that error.
21 Answer
Such as the error said, the given jar is compiled with an highest Java version. It require Java 17.
If you download it but it's not applied, try using java -version in your cmd, and you will see which version is selected.
If it's not the good one (which seems to be your issue) :
- Check the environment variable
JAVA_HOME&JRE_HOMEvalue to refer to Java 17 and not Java 8. - Close all Java instance (Minecraft client ...)
- Restart your computer to apply everything
Finally, the version should be bumped to 17 and not stay at Java 8.
