Java Courses

OOPs Concepts in Java:

The primary ideas behind Java’s Object Oriented Programming are OOP notions. They are polymorphism, inheritance, encapsulation, and abstraction. Understanding how Java works requires a firm grasp of these concepts. In a nutshell, Java OOP concepts allow us to design working methods and variables, then reuse all or parts of them without jeopardising security. Here, in this blog we will discuss oops concepts in java.

In Java, there are four main OOP ideas. These are the following:

Abstraction: The term “abstraction” refers to the use of simple objects to express complexity. We all know how to switch on the television, but we don’t have to understand how it works to enjoy it. Simple items like objects, classes, and variables are used to represent more complicated underlying code and data in Java. This is significant since it allows you to avoid doing the same thing many times. Join Java Training in Chennai to grow as a successful Java developer in future.

Encapsulation: ┬áThis is the technique of keeping a class’s fields secret and then making them accessible via public methods. It’s a safeguard that keeps the data and code contained within the class safe. We can reuse things like code components or variables in this way without granting system-wide unrestricted access to the data.

Inheritance: This is a unique feature of Java’s Object Oriented Programming. It allows programmers to build new classes that have some of the same characteristics as existing classes. This allows us to build on earlier work without having to start from scratch.

Polymorphism: This Java concepts allows programmers to use the same phrase in different contexts to mean different things. Method overloading is a type of polymorphism in Java. That’s when the coding itself implies distinct interpretations. Method overriding is the other type. That’s when the values of the supplied variables imply various meanings. More about this can be found further down.

How Abstraction Works?

Abstraction is a Java OOP concept that allows programmers to construct useful, reusable tools. A programmer, for example, can design a wide range of things. Variables, functions, and data structures are examples of these. Different classes of objects can also be created by programmers. These are examples of object definitions.

How Encapsulation Works?

We may reuse functionality without sacrificing security thanks to encapsulation. It’s a useful Java OOP concept because it allows us to save a lot of time. For example, we may develop a piece of code that calls specific data from a database. That code could be reused with various databases or processes. Encapsulation allows us to do so while maintaining the privacy of our original data. It also allows us to make changes to our original code without breaking it for others who have already adopted it.

How Inheritance Works?

Another time-saving Java OOP technique is inheritance. It works by allowing a new class to inherit the properties of an existing one. The inheriting class is referred to as a subclass or a child class. The initial class is frequently referred to as the parent. The keyword extends is used to create a new class that inherits properties from an existing one. Java Training in Coimbatore will enhance your technical skills in java programming language with career guidance.

How Polymorphism Works?

Polymorphism in Java works by affecting an object in a child class by using a reference to a parent class. We could extend the “animal” class to create a “horse” class. The “professional racing” class could also be implemented in that class. The “horse” class is “polymorphic,” as it has traits from both the “animal” and “professional racing” classes.

Method overriding and method overloading are two further examples of polymorphism in Java.

Method Overriding: The OOP polymorphism notion can be used by a child class to override a method of its parent class in method overriding. This allows a programmer to utilize the same method in different ways depending on whether the method is called by a parent class object or a child class object.

Method Overloading: A single method can perform many functions depending on the environment in which it is called in method overloading. That is, depending on the inputs supplied to a method, it may behave in a variety of ways.


Because the goal of java oops concepts is to save time while maintaining security and ease of use, the best practices are all focused on achieving that goal. To learn more about Java Online Course at FITA Academy for the best training with the best practical knowledge.

By Harsha