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  1. ,
    via Google Groups by Marcus Haebler

    Update "latest" to Java 8 on DockerHub.

  2. ,
    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

, 1 year ago
com/om/ruleengine/MainApp : Unsupported major.minor version 51.0
, 1 year ago
com/om/ruleengine/MainApp : Unsupported major.minor version 51.0
via GitHub by LeftoverNoodles
, 1 year ago
megameklab/com/MegaMekLab : Unsupported major.minor version 51.0
via markhneedham.com by Unknown author, 2 years ago
via dzone.com by Unknown author, 1 year ago
via GitHub by pixelass
, 2 years ago
com/galenframework/GalenMain : Unsupported major.minor version 51.0
java.lang.UnsupportedClassVersionError: com/om/ruleengine/MainApp : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247)