Top 5 Free Object-Oriented Programming Courses in Java for Beginners in 2021 [UPDATED]

The OOP or Object Oriented Programming is a paradigm that allows you to write a program by modeling real-world things in terms of class and object. It not only make representing a real-world thing in the programming world smoother but also allows you to manage the complexity of your program. Even though there are several programming paradigms, like procedural and functional, most of the code we write today is object-oriented, and some of the most popular programming languages are object-oriented, like Java, Python, PHP, and JavaScript all supported object-oriented programming.

Most of us learned object-oriented programming while learning a programming language, like, learning Java or Python. Still, at that time, our focus mostly remains on programming language rather than genuinely understanding OOP concepts.

That's why many programmers end up knowing how to declare a class or instantiate an object rather than understanding the purpose of quality and objective and how to design one.

This is something you learn on the job, where you need to solve a real-world problem. For example, consider Udemy, one of the popular online courses platform.

If you think about how Udemy should be storing courses, searching them, and recommending them to a user, and if you have to implement a similar solution, then how would you do that? That's where you start thinking about the Course as a class and each Course an instance of that Course. That's where the definition that "A class is a blueprint for creating objects" starts making sense.

In short, it's essential to have a good understanding of OOP basics, OOP design principles, and OOP patterns to write a robust program to solve real-world problems.





6 Free Courses to Learn Object-Oriented Programming in Java in 2021

In this article, I am going to share some of the free courses you can take to learn OOP basics or improve your object-oriented programming skills. This list contains Object-Oriented programming courses on Java and C# programming language from Udemy, Coursera, and Pluralsight.  You can join these free training courses to learn OOP basics online. 

1. Object-Oriented Programming in JAVA (Udemy)

This is a free course to learn Object-Oriented Programming in Java from Udemy. The course will not only teach you how to structure your code using class and objects but also how to do object-oriented programming by bundling attributes and methods within a category.

You also will learn about the four pillars that hold together object-oriented programming, which are:
  • Abstraction
  • Encapsulation
  • Polymorphism
  • Inheritance
  • Interfaces
  • Overloading and Overriding
  • Constructors etc.
At the end of this course, you will be able to write your own object-oriented programs in the Java programming language.

5 Free Object-Oriented Programming Online Courses for Programmers





2.  Master Object-Oriented Programming Concepts in Java

This is a free course to learn object-oriented programming in Java from UDemy. It will introduce you to some of the essential OOP concepts in Java, including class, objects, inheritance, and Collections.

You will learn how to use these object-oriented programming concepts in code examples, discover how these concepts are used in real-world applications that require user input, and understand the benefits of mastering these concepts in Java.

By the end of the course, you will create your own game (one of the best ways to improve your OOP skill), understand how and when to apply foundational Java concepts, and will gain a deeper understanding of the tools and logic that professional Java developers use every day.

free Java object oriented programming course




3. Object-Oriented Programming in Java [Coursera Free Course]

This is one of the best free courses to learn Object Oriented Programming using Java on Coursera. This course is offered by Duke University and its part of multiple specializations on Coursera like Object Oriented Programming in Java Specialization and Object Oriented Java Programming: Data Structures and Beyond Specialization, which means completing this course will also count towards those certifications. 

In this course, you will learn how to use Object Oriented Programming by following a Data Visualization example, along the way, you will learn about key object-oriented concepts like class, object, and their relationship.

You will also learn about Inheritance and how to model real-world scenarios into Objects which is really important for any application developer and Java programmer. The best part of this course is that you will get a chance to learn from Google Engineers which makes an appearance in this course. 

As I said, the course is free-to-audit which means you can learn for free but you need to pay if you also want certification, and then you need to complete the specialization mentioned above. If you are interested in Coursera Certifications then I suggest you join Coursera Plus, a subscription program that provides unlimited certification and courses for a monthly fee. 

free Coursera course to learn Object Oriented Programming in Java




4. Basics of Object-Oriented Programming with C#

This is another free course to learn Object Oritend basics from Udemy but with C#. If you are a C# developer, then you can use this Course to learn object-oriented programming.

This course will lay the foundations of Object-Oriented Programming (OOP) in your mind, allowing you to progress to more complex, systematic, and cleaner Programming methods.

The course is aimed at students who have at least some coding experience, preferably with C# (but Java or any other similar language is also acceptable).

Finally, you will build a Project "Warrior Wars!" to practice your object-oriented programming skill.







5. SOLID Principles of Object-Oriented Design

This is a great course to learn object-oriented design principles, which is also an essential part of learning Object-oriented programming.

This Course introduces foundational principles of creating well-crafted code and is appropriate for anyone hoping to improve as a developer.

The SOLID principles are coined by Uncle Bob in his classic book Clean Code (must-read books for any Java program if you haven't read it yet then read it now), and they are fundamental to designing maintainable and robust OOP applications.

Whether you've only just begun writing software or have been doing so for years, these principles, when used appropriately, can improve the encapsulation and coupling of your application, making it more manageable and testable in the face of changing requirements.

By the way, you would need a Pluralsight membership to join this course which costs around $29 per month or $299 per year (14% discount). I highly recommend this subscription to all programmers as it provides instant access to more than 7000+ online courses to learn any tech skill. Alternatively, you can also use their 10-day-free-pass to watch this course for FREE.


free Pluralsight course to learn object oriented programming




6. Object-Oriented Programming (OOPs) for JAVA Interviews 

This is another best free online course to learn Object Oriented Programming from Udemy which teaches you OOP concepts for Java interviews. In this free Udemy course, Object-Oriented Programming (OOPs) for JAVA Certification, you review the basics of objects and classes covered in their previous courses.

The best part of this Course is that you will learn OOP by preparing for interviews which is a great method to learn as when you prepare for interviews you are much more focused and research-oriented than at normal times. 

Here are the things you will learn in this course:
  • OOP Basics like class and objects
  • OOP Fundamentals like Abstraction, Encapsulation, Inheritance, and Polymorphism
  • Method Overloading and Overriding, Hiding
  • Abstract class and interface
  • Constructors 
  • Organizing object-oriented code
Overall a comprehensive 13-hour long course to learn key object-oriented concepts and fundamentals from an interview point of view. 

best free Java Object Oriented Programming course


That's all about some of the free courses to learn object-oriented programming online. A good understanding of object-oriented programming basics, design principles, and design patterns is mandatory for today's programmers, and every beginner programmer should spend some time learning those in their choice of a programming language like Java or Python.


Other Free Online Courses You May like to explore

Thanks for reading this article so far. If you like these best free Object-Oriented Programming training courses, then please share them with your friends and colleagues. If you have any questions or feedback, then please drop a note.

P. S. - If you are looking for an Object-Oriented Design Course instead of Object-Oriented Programming, then I suggest you join Grokking the Object-Oriented Design Interview course on Educative, an interactive coding platform where you learn by doing in the browser. 

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