f

Edited July 13, 201511 yr by Jonathan123

Ask them lol.

Wrong java.

Push yourself on the carotid artery.

Try to use java version 1.7, not 1.8.

i use 1.7

jdk or?

jdk

Recompile using java 7.

i use java 7

Recompile using java 7.

 

The core was compiled using another version of java than you are trying to run. For example, you compiled it under java 8 and you try to run it upder java 7.

Edited June 30, 201511 yr by SweeTs

Or just upd8 to the head version of java jdk?