Startup issue?

[Dominick Perini]

Plugin version: 7.1.3 Beta Issue: Will not load the map,.

I just do not know what this means:

[Server thread/INFO]: EWG require JDK. If you have installed it already, please set JAVA_HOME

[Dominick Perini]

How do i use this to generate a world if server hosts only support Java 7/8 and not JDK? Can I get JDK onto my server? Please, I have players waiting anxiously for an epic world!