Object Oriented ABAP

In this article we will discuss what happens when a class inherits a class with constructor. The constructor is a special method, and it is not inherited to the subclass like normal methods. Thus, the inheritor class can define its own constructor that is fully independent from the definition of the constructor in its superclass. […]

For scenarios where subclass has to change the implementation of the inherited instance method to have its own implementation, we can use method redefinition. Method redefinition supports only re-implementation of inherited method, signature of the method cannot be changed. Also, the visibility of the redefined method should remain the same as in the parent class.

In this article we will understand in detail about the ABAP Class visibility sections. In an ABAP class, you can have three visibility sections PUBLIC SECTION, PROTECTED SECTION, PRIVATE SECTION. There is no default visibility section. Hence, you must declare at least one of the three visibility section when defining ABAP Class. All components of

Inheritance is used to derive a new class from an existing class. New class is called child class, subclass or derived class. Existing class is called parent class or superclass. The subclass inherits all the components of the superclass defined under PUBLIC and PROTECTED section, but not under PRIVATE section. Subclass components can access the

Inheritance is an important concept of Object-Oriented programming. But, to really understand the importance of inheritance, you need to first understand the concept of Generalization and Specialization. Inheritance The general concept of Inheritance is : a class ( known as subclass ) inherits another class ( known as superclass ). In Inheritance, the subclass inherits

In object-oriented ABAP, the self-reference variable ME points to the instance in which the method is currently being executed. In other words, within an instance method, self-reference variable ME points to the object itself. The best way to understand this is with the help of below example: In the above code, the instance attribute and