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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 wilk, 10 months ago
test (Uns rted major.minor version 49.0)
via Coderanch by ananya sa, 1 year ago
testpgm1 (Uns upported major.minor version 50.0)
via Google Groups by depo, 10 months ago
MailSendDialog (Unsupported major.minor version 49.0)
via Coderanch by Joel Handloff, 1 year ago
MyFirstApp (U nsupported major.minor version 49.0)
java.lang.UnsupportedClassVersionError: test (Unsrted major.minor version 49.0) at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source)