java.lang.UnsupportedClassVersionError

Bad version number in .class file

Samebug tips4

This might be caused by and outdated version of Java, SonarQube now uses Java 8 as default. You might upgrade java or use an older version of SonarQube.

If you're using intellij plugin of sonarqube, you might have to set the JAVA_HOME ambient variable manually.

Don't give up yet. Our experts can help. Paste your full stack trace to get a solution.

Solutions on the web4785

  • via Coderanch by Oczek Oczkowy, 9 months ago
    Bad version number in .class file
  • via Coderanch by Rajeev Ravindran, 11 months ago
    Bad version number in .class file
  • via Coderanch by Dave Alvarado, 7 months ago
    Bad version number in .class file
  • Stack trace

    • java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) 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 org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227) at jenkins.maven3.agent.Maven31Main.main(Maven31Main.java:138) at jenkins.maven3.agent.Maven31Main.main(Maven31Main.java:67)

    Write tip

    You have a different solution? A short tip here would help you and many other users who saw this issue last week.

    Users with the same issue

    Once, 1 month ago
    2 times, 5 months ago
    Unknown user
    Once, 9 months ago
    Unknown user
    Once, 10 months ago
    Unknown user
    Once, 10 months ago
    193 more bugmates