Basics of Core Java
Introduction to Java & OOP’s concepts and their implementation in java
Java is
an object oriented, internet programming language.
Its main
features are:-
Ø Platform Independence.
Ø Security.
OOP’s
It is a
programming model that simplifies software development and maintenance by
providing certain rules which are followed by the designer at the time of
designing the software and by the developers at the time of developing and
maintaining the software.
The
major advantage of this model is that we have habituated this model in our day
to day life.
Basic concepts of OOP’s
i.
Object
ii.
Classification
iii.
Generalization
& Inheritance
iv.
Polymorphism
v.
Data
Encapsulation
Object
An
object is a discrete (distinct/unique/different) entity that has well-defined
attributes and behavior. It can be a physical thing as well as an abstract concept.
Classification
Objects
with common attributes, common behavior and having common relationship with
other objects are grouped into logical units called classes. This process is
called classification.
Classes
are used to manage objects.
Generalization & Inheritance
Through
generalization we pick up common attributes and behavior of class. In this way
we manage the class by using it.
Generalization
is the process of abstraction. Generalization is implemented with the help of
inheritance
Polymorphism
It is a
natural phenomenon which states that in real life one thing can exists in
different forms. E.g. - Water can be in three forms.
Data Encapsulation (To protect something)
It is a
process by which we can encapsulate the data and this way we are protecting the
data.
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