Added error message to handle the case when openjava.jar has been compiled using a later version of Java than the one the user is currently using.
Added error message to handle the case when openjava.jar has been compiled using a later version of Java than the one the user is currently using.

CruorVolt/mu_bbmap,jeffoffutt/muJava,wuxishy/WeakmuJava,CruorVolt/mu_bbmap,CruorVolt/mu_bbmap,CruorVolt/mu_bbmap