How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version

The java.lang.UnsupportedClassVersionError error is usually caused by trying to run a Java class that was compiled with a newer version of the Java compiler than the version of the JRE (Java Runtime Environment) that you are using.

To fix this error, you need to ensure that you are using a compatible version of the JRE. You can check the version of the JRE that you are using by running the java -version command in the terminal.

If you are using an older version of the JRE, you can try updating to the latest version by downloading and installing the latest JDK (Java Development Kit) from the Oracle website. The JDK includes the JRE and the Java compiler, and it is usually backward compatible with older versions of Java.

Alternatively, you can try setting the JAVA_HOME environment variable to point to the directory where the JDK is installed. This can help ensure that the correct version of the JRE is used when running Java applications.

If you are unable to update the JRE, you may need to recompile the Java class with an older version of the Java compiler that is compatible with your version of the JRE. You can do this by specifying the --release flag and the desired version number when compiling the class, for example:

javac --release 8

I hope this helps. Let me know if you have any questions.