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POJava error: Bad version number in .class file error
 

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  1. POJava error: Bad version number in .class file error
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    <p>I've seen other questions relating to this exact error, but they don't seem to help at all.</p> <p>I'm coding an app to run on a Linux system (CentOS if I'm not mistaken), which has Java 1.5 version. I am currently editing the program on my Eclipse IDE on my Mac OSX system which has Java 1.6.</p> <p>I compiled the project into a runnable .JAR file. When prompted with the option of what to do with the libraries in Eclipse, I choose "extract selected packages into .JAR file".</p> <p>I know Eclipse has its own compiler, so in the project settings I changed the target compiler to Java 1.5 and rebuilt. And then repackaged the runnable jar file.</p> <p>However, when running the .JAR file with "java -jar file.jar" on the target machine, I still get the aforementioned "Bad version number" error.</p> <p>Can somebody help?</p> <p>Full error is:</p> <pre><code>at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) </code></pre> <p>I am using only using one external library, sun-javamail.</p> <p>Thank you</p>
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    1. USVasco Patricio
    1. USVasco Patricio
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      1. USVasco Patricio
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    1. COPlease print the full error. I have two ideas as to what your issue is but I'm not entirely sure atm.
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      1. POJava error: Bad version number in .class file error
      1. USColton
    2. COThank you. Will do in a few minutes.
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      1. POJava error: Bad version number in .class file error
      1. USVasco Patricio
    3. CO*"When prompted with the option of what to do with the libraries"* What libraries? And are you recompiling them as well, or just putting the classes into the final Jar?
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      1. POJava error: Bad version number in .class file error
      1. USAndrew Thompson
 

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