UnsupportedClassVersionError: com/google/googlejavaformat/java/Main has been compiled by a more recent version of the Java Runtime

[TimeForANinja]

Hey,

getting the following Runtime-Error for all my builds

Run axel-op/googlejavaformat-action@v2.0.0
  with:
    args: --replace
    files: **/*.java
    skipCommit: false
/usr/bin/curl -sL https://github.com/google/google-java-format/releases/download/google-java-format-1.8/google-java-format-1.8-all-deps.jar -o /home/runner/google-java-format.jar
/usr/bin/java -jar /home/runner/google-java-format.jar --version
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/google/googlejavaformat/java/Main has been compiled by a more recent version of the Java Runtime (class file version 55.0), 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:757)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)
##[error]Error: The process '/usr/bin/java' failed with exit code 1

using ubuntu-latest without any manual changes 🤔

[axel-op]

Hey, the latest version of Google Java Format requires JDK 11 at least, and by default ubuntu-latest is executed with JDK 8, that's why you have this error (see #2).

I published a new version of my action a few days ago (v3.0.0), that will automatically use a previous version of Google Java Format if you don't use JDK 11 or further.

However I strongly recommend you to switch to a more recent JDK if possible. You can do so simply by adding a step before executing this action, as indicated in the README:

jobs:

  formatting:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-java@v1 # Add this step (if possible)
        with:
          java-version: "11"
      - uses: axel-op/googlejavaformat-action@v3.0.0 # Change version tag here
        with:
          args: "--skip-sorting-imports --replace"

[TimeForANinja]

👍 yep that solved it - builds now passing

[hantsy]

Got the same issue, but if I added Java version, the build task will be ignored completely in my case.

https://github.com/hantsy/cargotracker/pull/11/checks?check_run_id=1782645512

[hantsy]

I found the reason when I set up Java 11, I can not set version arg for this action, else it will be ignored.

[axel-op]

I found the reason when I set up Java 11, I can not set version arg for this action, else it will be ignored.

Hi, I don't understand what you mean. The version input is always taken into account, even when you set Java 11 as your JDK.