Object Oriented ABAP

Accessing methods using super class reference.
1. By the super class reference (REF_VEHICLE) it is possible to access all the methods which
are defined at the super class but the implementations are taken from the sub class.
2. If any method is redefined at the sub class then that method‟s implementation which
exist at the sub class is taken in to consideration.
E.g. assume that „method2‟ is redefined at the sub class.
When this method is accessed using the super class reference
Like:
Call method REF_VEHICLE->method2.
Here we can access the implementation which exists at the sub class but not from the super
class.
3. It is not possible to access the methods which only defined in the sub class using the
super class reference.
E.g. Method4 is not accessed using reference REF_VEHICLE.
Call method REF_VEHICLE-> Method4.
This is wrong convention.
Demo for narrowing casting:
Go to transaction SE38.