Can you give an example of using the final modifier when declaring a class in Java?

The final modifier in Java when declaring a class means that this class cannot be inherited. It is useful when you want to prevent extension of the class to preserve its behavior or security.

Example:

public final class Constants {
    public static final String APP_NAME = "MyApp";
    // Other constants
}

// Attempting to inherit will cause a compile error
// public class ExtendedConstants extends Constants {} // Error

In this example, the Constants class is declared as final to prevent inheritance and behavior modification.