Inheritance is an integral part of OOP

1. Inheritance

2. Definition
In object-oriented programming, inheritance
enables new objects to take on the properties of
existing objects. A class that is used as the basis
for inheritance is called a superclass or base
class

3. Inheritance is a good choice when
● Your inheritance hierarchy represents an "is-a"
relationship and not a "has-a" relationship.
● You can reuse code from the base classes.
● You need to apply the same class and methods to
different data types.
● The class hierarchy is reasonably shallow, and other
developers are not likely to add many more levels.
● You want to make global changes to derived classes
by changing a base class.

4. Types
● The different types of inheritance are:
-Single Inheritance:

5. -Hierarchical Inheritance

6. Multiple inheritance

7. Multilevel Inheritance

8. Hybrid Inheritance

9. Advantages
● Reusability -- facility to use public methods of base class
without rewriting the same
● Extensibility -- extending the base class logic as per
business logic of the derived class
● Data hiding -- base class can decide to keep some data
private so that it cannot be altered by the derived class
● Overriding--With inheritance, we will be able to override
the methods of the base class so that meaningful
implementation of the base class method can be
designed in the derived class.

10. Disadvantages
● Main disadvantage of using inheritance is that the two
classes (base and inherited class) get tightly coupled.
● This means one cannot be used independent of each
other.
● Also with time, during maintenance adding new features
both base as well as derived classes are required to be
changed. If a method signature is changed then we will be
affected in both cases (inheritance & composition)
● If a method is deleted in the "super class" or aggregate,
then we will have to re-factor in case of using that method

11. THANK YOU!