Why Am I Getting a 'NoClassDefFoundError: Wrong Name' Exception in My Java Code?

NoClassDefFoundError: Class Name Mismatch in Package

When compiling Java code in Netbeans and running the generated .class file, you may encounter a "NoClassDefFoundError: wrong name" exception. This error indicates a mismatch between the expected and actual names of a class.

The provided error message states:

Exception in thread "main" java.lang.NoClassDefFoundError: ClientREST (wrong name: clientrest/ClientREST)

This message suggests that the code is expecting a class named "ClientREST" without any package, but the actual class is named "clientrest/ClientREST," which includes a package name.

To resolve this issue, you should ensure that you are running the code from the correct location. Since the class is in a package, you need to navigate to the package root directory and execute the class from there.

For example, if the class is in a package "clientrest," you should run the following command from the directory containing the "clientrest" folder:

java clientrest.ClientREST

Avoid running the command from within the "clientrest" folder, as this will result in the "wrong name" error.

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