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  1. ,
    via Stack Overflow by ERJAN

    This exception occurs when using an older version of java. Mainly when trying to run a jar compiled with a newer Java version in an older Java version. We can avoid this issue by executing the jar in the same version which it was compiled.

Solutions on the web

via Google Groups by momalxa, 1 year ago
Bad version number in .class > file
via Google Groups by Pavlin Dobrev, 2 years ago
Empty query.