24 - ABAP OOPS - Abstract Class Part1

1) Definition of Abstract Class.
2) Creation of Abstract Class Using SE24.

[srikrishnakannaya]

Hi Sir, in this ABSTRACT CLASS, after creating DISPLAY METHOD and making it as ABSTRACT, i created one more method, so in that it is allowing me to write the code (logic), so what is the significance of this? as per theory it is only used for Declarations, but Whenever we create a METHOD in this Abstract class we need to make it ABSTRACT, otherwise it is letting us to write the logic inside that method, so how can it is unique from normal class?

[luckyfin]

even if we create a class as final class. If someone later remove the final check box. in this case what is the use if we make the class as final?