Object-oriented programming (OOPs) concept in Java (1)

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Guide for java beginners-Object-oriented
programming (OOPs) concept in Java
What is Java? Java is a programming language and
a computing platform for application
development. It was first released in 1995 by Sun
Microsystem and later acquired by Oracle
Corporation. It is one of the most commonly used
programming languages. What is Java
platform? Java platform is a collection of
programs that help to develop and run programs in
the Java programming language. Java platform
includes an execution engine, a compiler, and a
number of libraries. JAVA is a platform-independen
t language. It is not specific to any processor
or operating system. Object-oriented programming
(OOPs) concept in Java Object-oriented
programming as the name implies, Object-Oriented
Programming or OOPs refers to languages that use
objects in programming. Object-oriented
programming aims to real-world entities, such as
inheritance, to hide, to implement polymorphism,
etc. in the programming. The main goal of OOP is
that data and functions that operate on them, so
that no other part of the code to access this
data except this feature.

• OOPs Concepts
• Polymorphism
• Inheritance
• Encapsulation
• Abstraction

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• Class
• Object
• Method

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Polymorphism polymorphism refers to the ability
of OOPs programming languages to distinguish
efficiently between entities of the same name.
This is done by Java using the signature and
declaration of these entities. Inheritance
inheritance is an important pillar of OOP (object
oriented programming). It is the mechanism in
java that allows a class to inherit the
functions(fields and methods) of another
class. Encapsulation encapsulation is defined
as wrapping of data under a single unit. It is
the mechanism that binds code and data that it
manipulates.Another way to
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think about encapsulation is that it is a shield
that prevents the data from being accessed by
the code outside of this shield. Abstraction
data abstraction is the property by which only
the essential details are displayed to the
user.The trivial or non-essential units are not
displayed to the user. Ex a car is regarded as
a car rather than its individual
components. Class A Class is a custom blueprint
or prototype from which to create objects. It
represents the set of properties or methods that
are common to all objects of a type. Object it
is a basic unit of object-oriented programming
and represents the real- world entities. A
typical Java program creates many objects that
are known to interact by calling
methods. Method a method is a collection of
statements that perform a specific task and
return the result to the caller. A method can
perform a specific task without returning
anything. Methods allow us to re-use the code
without re-writing the code. In Java, each
method must be part of a class that is different
from languages such as C, C, and Python.
Message Passing objects communicate with each
other by sending and receiving information. A
message for an object is a request for execution
of a procedure and therefore calls a function in
the receiving object that generates the desired
results. When the message is delivered, the name
of the object, the name of the function, and the
information to be sent are specified. For more
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