What is object-oriented programming?

Object-oriented programming (OOP) is a programming approach that organizes code around objects, which combine data and behavior.

What are the four main principles of OOP?

The main OOP principles are encapsulation, abstraction, inheritance, and polymorphism.

What will I learn in a Java object-oriented programming course?

You will learn to create classes and objects, use constructors, apply inheritance, implement interfaces, and work with polymorphism in Java.

Is object-oriented programming in Java good for beginners?

Yes. Java is widely used for learning OOP because its class-based structure makes core concepts clear and practical.

How does Python support object-oriented programming?

Python supports OOP through classes, objects, instance methods, inheritance, encapsulation conventions, and polymorphism.

What is inheritance in object-oriented programming?

Inheritance lets a new class reuse and extend the attributes and methods of an existing class.

How do JavaScript objects and prototypes relate to OOP?

JavaScript uses prototype-based OOP, where objects can inherit properties and methods from other objects through the prototype chain.

All courses > Technology and Programming > Programming Languages ( Python, Ruby, Java, C ) ::

Free online courses on Object Oriented Programming

Explore free online Object Oriented Programming courses and build practical skills in classes, objects, inheritance, polymorphism, encapsulation, and popular OOP languages. Learn at your own pace with beginner-friendly lessons, hands-on projects, and expert guidance. Enroll today and earn a certificate to showcase your programming skills.

Video courses

Free online courses on Object Oriented Programming

Free video courses

Free Course Image Java Object Oriented Programming

Free CourseJava Object Oriented Programming

4.7

(7)

1h19m

10 exercises

Free Course Image Object Oriented Programming in Java

Free CourseObject Oriented Programming in Java

New

9h14m

7 exercises

Free Course Image Object-Oriented Programming OOP in Python: Classes, Inheritance and Polymorphism

Free CourseObject-Oriented Programming OOP in Python: Classes, Inheritance and Polymorphism

New

5h25m

29 exercises

Free Course Image JavaScript Objects and Prototypes In-depth

Free CourseJavaScript Objects and Prototypes In-depth

New

2h15m

13 exercises

+ Load more

Exploring Ruby: A Beginner’s Guide to the Language’s Syntax and Philosophy

Discover Ruby’s syntax, features, and philosophy in this beginner-friendly guide. Learn why Ruby is loved for its simplicity, flexibility, and developer happiness.

Mastering Object-Oriented Concepts in C#

Master C# OOP fundamentals—encapsulation, inheritance, polymorphism, abstraction—to build scalable, maintainable, and reusable software systems effectively.

Free Online Object Oriented Programming Courses

Develop valuable software development skills with our selection of free online Object Oriented Programming courses. These educational courses introduce the principles, techniques, and best practices used to create organized, reusable, and maintainable software. Whether you are beginning your programming education or expanding your technical knowledge, you can study essential OOP concepts through accessible lessons and practical learning resources.

Learn the Fundamentals of Object Oriented Programming

Explore important topics such as classes, objects, attributes, methods, constructors, interfaces, and relationships between software components. The courses also explain the core principles of encapsulation, inheritance, polymorphism, and abstraction. By understanding these concepts, students can learn how programmers model real-world entities, reduce code repetition, protect data, and design flexible applications.

Free Courses with Exercises and Certification

All courses listed on this page are free and include educational lessons that support independent study. They also include exercises to help learners review programming concepts, practice logical reasoning, and reinforce new technical skills. After completing an eligible course, students can receive free certification, providing a useful way to document learning achievements and strengthen a professional or academic profile.

Skills You Can Develop

Understand classes, objects, methods, and properties.
Apply abstraction, encapsulation, inheritance, and polymorphism.
Organize source code into reusable software components.
Practice problem-solving with programming exercises.
Learn principles of software architecture and application design.
Prepare for further study in programming and computer science.

Who Should Study Object Oriented Programming?

These free courses are suitable for beginners, students, aspiring software developers, and professionals who want to update their programming knowledge. OOP education can support learning in popular languages such as Java, Python, C++, C#, PHP, Kotlin, and Swift. It is also useful for learners interested in web development, mobile applications, game development, backend systems, software engineering, and technical career preparation.

How to Access the Free Courses

To access the courses, lessons, exercises, and free certification, it is necessary to install the Cursa application. Android users can install it through Google Play by selecting Download for Android. iPhone users can install it through the App Store by selecting Download for iOS / iPhone.

Start learning today with free online Object Oriented Programming courses and build a stronger foundation for software development, coding projects, academic study, and technology careers.