The
characteristics of OOP are:
Class definitions – Basic building blocks OOP and a single
entity which has data and operations on data together
Objects – The instances of a class which are used in real
functionality – its variables and operations
Abstraction – Specifying what to do but not how to do ; a
flexible feature for having a overall view of an object’s functionality.
Encapsulation – Binding data and operations of data
together in a single unit – A class adhere this feature
Inheritance and class hierarchy – Reusability and extension
of existing classes
Polymorphism – Multiple definitions for a single name -
functions with same name with different functionality; saves time in investing
many function names Operator and Function overloading
Generic classes – Class definitions for unspecified data.
They are known as container classes. They are flexible and reusable.
Class libraries – Built-in language specific classes
Message passing – Objects communicates through invoking
methods and sending data to them. This feature of sending and receiving
information among objects through function parameters is known as Message
Passing.
Some key features of the
Object Oriented programming are:
- Emphasis on data rather than procedure
- Programs are divided into entities known as objects
- Data Structures are designed such that they characterize objects
- Functions that operate on data of an object are tied together in data structures
- Data is hidden and cannot be accessed by external functions
- Objects communicate with each other through functions
- New data and functions can be easily added whenever necessary
