This repository serves as a comprehensive guide and code resource for understanding the fundamental concepts of Object-Oriented Programming (OOP) in Java. Each concept is demonstrated with clear, simple code examples to help solidify your understanding.
Object-Oriented Programming is a programming paradigm based on the concept of "objects," which can contain data and code. This approach aims to model real-world entities and their interactions, making code more organized, reusable, and easier to maintain.
A class is a blueprint for creating objects. It defines the state (fields) and behavior (methods) that an object will have. An object is an instance of a class, created from that blueprint.
Encapsulation is the practice of bundling data (fields) and the methods that operate on that data into a single
unit (a class). It also involves restricting direct access to some of an object's components, which is typically
achieved using access modifiers like private.
Inheritance is a mechanism where a new class (subclass) inherits fields and methods from an existing class (
superclass). This allows for code reusability and establishing a clear hierarchy between classes.
Polymorphism means "many forms." It allows objects of different classes to be treated as objects of a common superclass. The most common form is Dynamic Method Dispatch, where the specific method to be executed is determined at runtime.
Abstraction involves hiding complex implementation details and showing only the essential features of an object. This is typically achieved using abstract classes and interfaces.
An interface is a blueprint of a class. It can contain method signatures but no method bodies. A class can implement multiple interfaces, providing a form of multiple inheritance.
- Code Example:
[Coming soon...]
Packages are a way of organizing related classes and interfaces. They help to prevent naming conflicts and control access to classes.
Access modifiers control the visibility and accessibility of classes, fields, constructors, and methods. The four
types are public, protected, default (no keyword), and private.
Generics allow you to create classes, interfaces, and methods that operate on different types of data without type safety issues. They help to provide stronger type checks at compile time.
- Code Example:
[Coming soon...]