[Help] I Dont Know What Is That!

[Akken]

Buildfile: C:\Documents and Settings\admin\Desktop\L2J\build.xml

init:

commons:

   [delete] Deleting directory C:\Documents and Settings\admin\Desktop\L2J\build\classes

    [mkdir] Created dir: C:\Documents and Settings\admin\Desktop\L2J\build\classes

    [javac] C:\Documents and Settings\admin\Desktop\L2J\build.xml:51: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

 

BUILD FAILED

C:\Documents and Settings\admin\Desktop\L2J\build.xml:51: java.lang.UnsupportedClassVersionError: com/sun/tools/javac/Main : Unsupported major.minor version 51.0

 

Total time: 735 milliseconds

 

[Tryskell]

You messed with JDK version.

[Akken]

You messed with JDK version.

it happends only on the project i try to compile, on other files ive got nothing is happenning, all are normal..

 

I found lucera2 sources and wanted to try them out and leak some stuff for my own bussiness :P but seems crappy, even build.xml is messed up