Arch Linux

benm

Member

Registered: 2021-03-28

Posts: 90

[SOLVED] Problem with Java and LanguageTool

On a freshly updated system I installed languagetool from arch repos. I ran languagetool in the terminal and got the following error:

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/languagetool/gui/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), 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(ClassLoader.java:756)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:621)

Based on a search query, I found that class file version 61.0 corresponds to Java 17. Just to be safe I installed jre-openjdk, jre21-openjdk, and jre17-openjdk. Then for further troubleshooting I installed languagetool again. However, I still get the same error above. Anyone have any suggestions? This seems like it should be a simple java version error.

Last edited by benm (2025-05-09 23:48:55)

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Problem with Java and LanguageTool

Solved my own problem. For future readers,

Run archlinux-java status

$ archlinux-java status
Available Java environments:
  java-11-openjdk
  java-17-openjdk
  java-21-openjdk
  java-24-openjdk
  java-8-openjdk/jre (default)

Though other versions were installed, java-8 was default.

sudo archlinux-java set java-24-openjdk

Now it works.