Does this project need Java 8,Compulsory?

[search4mahesh]

Hi,

Is it compulsory to use Java 8.I am getting error like
java.lang.UnsupportedClassVersionError:
edu/stanford/nlp/simple/Document : Unsupported major.minor version 52.0

I am not sure why I am getting this error as compilation and run time env same and has java 1.8

Thanks,
Mahesh