In this guide, you will learn theOOPs Concepts in Java. Object-oriented programming System(OOPs) is a programming concept that is based on “objects”. The primary purpose of object-oriented programming is to i
When an object ‘has a’ another object, then, you have got an aggregation in between them. This is also called a ‘has a’ relationship. For an OOPs example; an employee can be only in one department. Even if the department is deleted, the employee exists. This is called ‘has a’...
OOPS Concept in Java In this post, we learn OOPs Concept in Java. OOPS Stands for Object Oriented Programming System. In this tutorial, I will introduce you to Class, Object, Constructor, Abstraction, Encapsulation, Inheritance, Polymorphism, Interface etc., Class: A class is a blueprint or ...
a chair, pen, table, keyboard, bike, etc. An Object can be defined as an instance of a class. An object contains an address and takes up some space in memory. Objects can communicate without knowing the details of each other's data or code. ...
In the above examples, java compiler doesn’t know the actual implementation class of Shape that will be used at runtime, hence runtime polymorphism. 4. Inheritance Inheritanceis the object-oriented programming concept where an object is based on another object. Inheritance is the mechanism of co...
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Example of encapsulation: A class in java is a simplest example of encapsulation. It keeps the data(variables) and behavior(methods) of an entity together. A class also restricts access to these data and behavior through the use of access specifiers. The concept of keeping instance variables ...
Top 30 Interview Questions on Java OOPS Concepts In this section, we’ll look at the top 30 interview questions on various Java OOPS concepts. Java is an Object-Oriented Programming language as it uses Objects that acquire certain properties with the help of functions and methods. Note that hi...
Aggregation Example in Java For example consider two classesStudentclass andAddressclass. Every student has an address so the relationship between student and address is a Has-A relationship. But if you consider its vice versa then it would not make any sense as anAddressdoesn’t need to have...
How does Association Work in OOPs along with Examples Let us see how the Association works in Java code which follows the OOPs concept along with the examples: Example #1: Aggregation Program Code: import java.util.*; // Employee class having the Employee information ...