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UnsupportedClassVersionError

Tyron

By Tyron
in Modder Support

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Tyron Stone Miner

Tyron

Posted
Posted

No Idea what I have done wrong but since yesterday whatever I do, when trying to launch my mod in Eclipse I get this error:

 

Exception in thread "main" java.lang.UnsupportedClassVersionError: GradleStart : Unsupported major.minor version 52.0

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:800)

        [....]

 

 

Google suggests I'm using the wrong Java version. In my run configurations the Runtime JRE 1.7.0_71 is selected. What happened? :/

Selecting (x) project specific settings + Java Compliance 1.7 in the Eclipse Compiler doesn't help either.

The JRE System Library in the Project is also jdk1.7.0_71

Tyron Stone Miner

Tyron

Posted
  • Author
Posted

Thanks for the reply, this still doesn't seem to help though. I've now set up forge completely anew and ran the following commands:

 

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>set JAVA_HOME=C:\Program Files\Java\jdk1.7.0_71

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>set PATH=C:\Program Files\Java\jdk1.7.0_71\bin

 

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>java -version

java version "1.7.0_71"

Java SE Runtime Environment (build 1.7.0_71-b14)

Java HotSpot 64-Bit Server VM (build 24.71-b01, mixed mode)

 

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>gradlew setupDecompWorkspace --refresh-dependencies

 

+ Attachments and other options

[....]

 

BUILD SUCCESSFUL

 

Total time: 5 mins 48.241 secs

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>gradlew eclipse

 

[....]

 

BUILD SUCCESSFUL

 

Total time: 14.087 secs

C:\[...]\forge-1.8-11.14.1.1336-src-vintagecraft>

 

 

 

Im starting Eclipse with this command: "C:\Program Files (x86)\eclipse\eclipse.exe" -vm "C:\Program Files\Java\jdk1.7.0_71\bin"

 

Still getting the exact same error :(

I chose JDK 1.7 because I can't see no options to choose JDK1.8 in Eclipse.

Tyron Stone Miner

Tyron

Posted
  • Author
Posted

>The GradleStart class is cached so if you run setupDecompWorkspace again it will probably not be regenerated.

I remade the dev env from scratch, so nothing could have been cached.

 

 

> In eclipse you choose the JDK like this: Window > Preferences > Java > Installed JREs

 

This worked! Thanks yet again, you're the real MVP!

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