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Editorial Team
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Asked: 2026-05-12T09:11:33+00:00

I have generated .jar file in windows. I have to execute that .jar file

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I have generated .jar file in windows.
I have to execute that .jar file in unix .

I am running that command (java -jar myJar.jar), but it’s giving 

 java.lang.UnsupportedVersionError

I am using java version 1.5.0.12 in Unix.

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1 Answer

  1. Editorial Team
     java.lang.UnsupportedVersionError

    You must be trying to launch a jar compiled with JDK6, with a local java1.5.

    You can either:

    • upgrade your jvm on Unix to 1.6
    • or re-compile your classes with a

    :

      javac -source 1.5 -target 1.5 -bootclasspath /path/to/jre1.5/lib/rt.jar

    to check if you can generate 1.5 bytecode compatible.

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