Hello when i try to "run" build.xml so i can make the l2j server i got this error can some1 help me?

 

you need to add the java path in to your computer variables

 

And also to set your java path in to your eclipse preferences at installed JREs

Not JRE, only JDK. JRE enough for running server.

Select Window > Preferences and this window pops up

 

 

 

press add and select JDK, tick it and ok.