How To Fix OO109 - Class & is final - it cannot have subclasses

OO109 - Overview

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 109

• Message text: Class & is final - it cannot have subclasses

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO109 - Class & is final - it cannot have subclasses ?

  The SAP error message OO109 indicates that you are trying to create a subclass of a class that has been declared as "final." In object-oriented programming, a final class is one that cannot be subclassed. This is a design choice made to prevent further inheritance, often to maintain the integrity of the class's implementation or to prevent misuse.
  
  Cause:
  
  Final Class Declaration: The class you are trying to subclass has been declared as final. This means that it is intended to be used as is, without any further derivation.
  Inheritance Attempt: You are attempting to create a new class that extends this final class, which is not allowed.
  
  
  Solution:
  
  Check Class Declaration: Review the class definition of the class you are trying to subclass. If it is indeed declared as final, you will need to reconsider your design.
  Use Composition Instead: Instead of subclassing, consider using composition. This means you can create a new class that