The “UnsupportedClassVersionError” occurs when a Java program is compiled with a higher version of Java than the one used to run it. Here’s a step-by-step guide to fix it:
1. Check Java Versions: First, determine the versions of Java used for compilation and execution. You can do this by running the following commands in your terminal or command prompt:
javac -version
java -version2. Identify the Mismatch: Compare the Java versions obtained in the previous step. The error typically occurs when trying to run a program compiled with a newer version of Java on an older Java runtime environment.
3. Update Java (if necessary): If the Java version used for execution is older than the one used for compilation, consider updating your Java runtime environment. You can download the latest version of Java from the official website and follow the installation instructions.
4. Recompile the Java Program: If updating Java is not an option or if the versions are compatible, recompile the Java program with the appropriate version. Use the following command to compile the program:
javac -source <version> -target <version> YourProgram.javaReplace ‘<version>‘ with the appropriate version number (e.g., 1.8 for Java 8).
5. Run the Program: After recompiling the program, try running it again using the ‘java‘ command:
java YourProgram6. Verify: Verify that the error no longer occurs and that the program runs as expected.
By following these steps, you should be able to resolve the “UnsupportedClassVersionError” and run your Java program successfully.