Problem running file . jar created by Intellij

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I’m trying to create an executable using Intellij. I followed all the steps on the official website, in addition to several tutorials on youtube. I was able to create the executable and run it inside IDEA

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But when I try to run it through the CMD the following messages appear:

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: teste/TesteCadastro has been compiled by a more recent version of the Java Runtime (class file version 57.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$100(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

I still don’t know how to solve this problem. Someone with a good heart could help me?

java intellij-idea

  • the version of your java that is in your classpath is older than the version you are using to compile the jar

1 answer

1


The version you are using to compile the classes (within Intellij) is Java 13, but the version of your JRE (who runs your compiled classes) is Java 8.

  • Then just update the JRE?

  • Yes, or, if you’re not going to use the new Java 13 Eatures, switch inside Intellij to use Java 8.

  • @Nahtann, it worked?

  • Ss, I managed to resolve. Thank you very much.

  • @Nahtann, your feedback is very important as it serves as a reference for other users who are having the same problem as you. Then, don’t forget to mark as an answer to close this topic. Good studies. (:

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