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- How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version 47 answers
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I am currently trying to run a plugin im working on onto a test server. The Minecraft server is running spigot 1.7.10, here is the servers java version: Marineford war full english sub.
here is my java version
So it makes no sense why I should be getting this error on my plugin when loading it.
I am using eclipse luna on windows 8.
marked as duplicate by netbrain, Makoto javaNov 26 '14 at 7:35
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3 Answers
You are compiling your plugin with the Java 8 compiler. You are running your server with Java 7, which is not capable of reading the Java 8-format class files in your plugin.
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You can either:
- Update the server to Java 8.
- Make Eclipse use the Java 7 compiler (if it's installed on your development machine) by selecting a Java 7 JDK version, in Preferences > Java > Installed JREs:
- Make Eclipse tell the Java 8 compiler to pretend to be the Java 7 compiler, by setting your 'compiler compliance level' to 1.7, in Preferences > Java > Compiler:
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Your code has been compiled with Java 8, while you are trying to run it with Java 7.Note that Eclipse has it's own compiler and does not use the one from the JDK and most probablyit is configured to use Java 8. Check you eclipse compiler preferences.