Find the best tutors and institutes for Java Training

Find Best Java Training Classes

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

JAVA OOPs Concepts (Object-Oriented Programming System)

Gaurav Kothari
16 Feb 0 0

JAVA OOPs Concepts (Object-Oriented Programming System)

It is primarily having below crucial points. Without below essential points, we will never be able to achieve OOPs in java, PHP, C#, etc. Now let us see the high-level understanding of OOPs concepts.

  • Object --> is nothing, but it is a real-world entity which we can see or feel. In other words, we can say object have shape, behaviour and from which we can perform some task. For ex: Car, Pen, book, etc. (Object create at runtime and reside in heap memory)
  • Class --> in simple words we can say it is a blueprint from which objects can be created. (It contains variables and methods in it) For ex:

                     public class TestCLass1{
                              //This is a java class
                            //It can have variables and techniques and some logics

  • Inheritance--> it is parent-child relationship. A child will acquire all properties from its parent. In other words, child class will acquire all behaviour and properties from the parent class. Importance of keywords in inheritance is (extends, implements). There are 3-4 types of inheritance exist. (IS-a and HAS-a relationship). Do connect with me will explain you in detail followed by real coding on IDEs.
  • Polymorphism--> in simple words we can say it is “performing the same task in different ways”. Poly means multiple and morphism means forms in whole (various forms). Two most import topic under this method overloading and method overriding.
  • Abstraction-->is data hiding. It is hiding of real implementation and only showing the functionality. For ex: downloading .exe file, it shows only installation not real code behind that .exe file.
  • Encapsulation-->Wrapping of data in a single unit. Java class is one of the encapsulation. For ex: just like different medicine wrapped under on capsule is also encapsulation.

               public class TestClass { //Here private sTest is wrapped under TestClass

                        private String sTest="Hi";

                        public String getsTest() {

                              return sTest;}

                        public void setsTest(String sTest) {

                              this.sTest = sTest;



Please add on comments and like this lesson, if it gave you some revision or refreshment on OOPs concepts.

0 Dislike
Follow 2

Please Enter a comment


Other Lessons for You

Java Collection
Collection: The collection provides an architecture like a list where we can store and manipulate the group of items. Through Collections, we can achieve operations such as searching, sorting, insertion,...

Java : Compile-time Versus Runtime optimization
While designing and development, one should think in terms of compile-time and run-time.It helps in understanding language basics in a better way.Let's understand this with a question below : What...

Surinder Pal Singh | 30/12/2020

1 0

Product Owner in Agile
- Define the overall UX strategy and vision for the user experiences across all of the external and internal platform, aligning with the Senior Leadership Team.- Working closely with the business team...

Dannie Joe A | 11/09/2020

0 0

Write your first Python program in 10 minutes
1. Download python from python official site search "python download" in google 2. Install in your machine 3. verify using : "python --version" command 4. Write first program using notepad create...

Debrati Sadhu | 04/08/2020

1 0

Overloading in JAVA
When a class contains more than one method with the same method name but different argument types, then it is called Overloading. Methods are said to be Overloaded methods. Also, know as Compile time...

Swati S. | 19/05/2020

0 0

Looking for Java Training Classes?

Find best tutors for Java Training Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Java Training Classes?

Find best Java Training Classes in your locality on UrbanPro

Post your learning requirement is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on, to fulfill their learning requirements across 1,000+ categories. Using, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more