Java OOPS Tutorial with Examples

This tutorial about OOPS Principles, OOPS concepts in order to design strong object-oriented design for Java or J2EE Web Applications.
All OOPS concepts are explained with real-world examples, lots of source code with an explanation, applicability, class diagrams, etc.

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OOPS Concepts

>> What Is Object in Java with Programming Examples
In this article, we will learn what is Object in Java. How to declare, create and initialize objects in Java with examples. We will also look into different ways to create an Object in Java. We will also explore java.lang.Object class methods with examples.

>> What is Class in Java with Programming Examples - In this article, we will learn how to declare, create a Class in Java with examples. We will also look into different components classes like member variables, constructors, methods etc.

>> What are All the Different Ways to Create an Object in Java? - In this quick article, we will discuss 5 different ways to create an Object in Java.

>> Abstraction in Java with Example

In this article, we will learn Abstraction with real-world examples, class diagram, and implementation with lots of examples.

>> Encapsulation in Java with Example

In this article, we will learn Encapsulation with real-world examples, class diagram, and implementation with lots of examples.

>> Inheritance in Java with Example

In this article, we will learn Inheritance with real-world examples, class diagram and implementation with lots of examples.

>> Polymorphism in Java with Example

In this article, we will learn Polymorphism with real-world examples, class diagram and implementation with lots of examples.

>> Composition in Java with Example

In this article, we will learn Composition with real-world examples,  class diagram and implementation with lots of examples.

>> Aggregation in Java with Example

In this article, we will learn Aggregation with real-world examples, class diagram and implementation with lots of examples.

>> Association in Java with Example

In this article, we will learn the Association with real-world examples, class diagram and implementation with lots of examples.

>> Cohesion in Java with Example

In this article, we will learn Cohesion with real-world examples, class diagram and implementation with lots of examples.

>> Coupling in Java with Example

In this article, we will learn Coupling with real-world examples, class diagram and implementation with lots of examples.

>> Delegation in Java with Example

In this article, we will learn Delegation with real-world examples, class diagram and implementation with lots of examples.

>> Object Class Methods in Java with Examples // Important
The Object class, in the java.lang package sits at the top of the class hierarchy tree. This article describes the Object class methods with examples.

>> Java Interface

This post walks you through how to create interfaces in real projects, using Java 8 static and default methods in java projects.

>> Java Abstract Class

In this guide, we will learn about Abstract class, Abstract Definition Rules, it's usage, real-world examples and how to use in real time projects.

>> Nested Classes in Java

This post walks you through the basics of nested classes, different types of nested classes and examples.

>> Packages in Java with Examples

In this article, you will learn everything about packages in Java.

The source code is available on GitHub: Object-Oriented Design Guide

SOLID OOPS Principles

>> Single Responsibility Principle In this article, we will learn the Single Responsibility Principle with real-world examples, class diagram an implementation with lots of examples.

>> Open Closed Principle

In this article, we will learn the Open Closed Principle with real-world examples, class diagram and implementation with lots of examples.

>> Liskov's Substitution Principle

In this article, we will learn Liskov's Substitution Principle with real-world examples,  class diagram and implementation with lots of examples.

>> Interface Segregation Principle

In this article, we will learn the Interface Segregation Principle with real-world examples,  class diagram and implementation with lots of examples.

>> Dependency Inversion Principle

In this article, we will learn the Dependency Inversion Principle with real-world examples,  class diagram and implementation with lots of examples.

The source code is available on GitHub: Design Principles

Interview Questions and Answers

OOPS Interview Questions and Answers for Beginners and Experienced // Popular

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