Skip to main content
Homejava

Course

Introduction to Object-Oriented Programming in Java

IntermediateSkill Level
4.8+
941 reviews
Updated 12/2025
Learn key object-oriented programming concepts, from basic classes and objects to advanced topics like inheritance and polymorphism.
Start Course for Free
JavaProgramming
4 hr
9 videos
28 Exercises
2,350 XP
8,945
Statement of Accomplishment

Create Your Free Account

or

By continuing, you accept our Terms of Use, our Privacy Policy and that your data is stored in the USA.

Loved by learners at thousands of companies

Group

Training a Team?

Try for Business

Course Description

Object-oriented programming (OOP) is a powerful approach to writing organized and scalable software. Java, one of the world’s most popular programming languages, brings OOP to life with clear syntax and strong community support. In this course, you’ll learn how to use Java to model real-world systems using classes, objects, inheritance, encapsulation, and more.

Build Real-World Java Classes and Objects

Begin by learning to define classes as blueprints and use them to create object instances. You’ll apply core Java syntax to build reusable components that mirror real-world entities, like cars, passports, and formulas.

Add Behavior with Constructors and Methods

Master the use of constructors to initialize object state and explore methods to add behavior. You’ll write both void and return-type methods, helping you create dynamic and interactive programs.

Secure and Reuse Code with Encapsulation and Inheritance

Explore how access modifiers control what’s visible to users of your code. Learn how to use inheritance and abstract classes to eliminate duplication and create structured hierarchies.

Apply Interfaces and Polymorphism

Use interfaces to add flexibility and implement shared behavior across classes. Finally, unlock the power of polymorphism by overriding and overloading methods for more adaptable software designs.

By the end, you’ll be able to design modular Java applications with clean, object-oriented architecture.

Prerequisites

Intermediate Java
1

Object-Oriented Programming (OOP) in Java

Explore the fundamentals of object-oriented programming (OOP) in Java, focusing on the distinctions between primitive data types and objects. Learn to define and create classes and objects and understand the critical components of classes, such as fields, constructors, and methods.
Start Chapter
2

Encapsulation & Inheritance

Deep dive into object-oriented programming by exploring key concepts such as encapsulation, inheritance, and abstraction. Learn how to control access to class members, extend class functionality, and define abstract concepts and contracts that ensure consistency across implementations.
Start Chapter
3

Interfaces and Polymorphism

Strengthen your object-oriented programming skills by exploring how Java interfaces and polymorphism work. Learn how to define interfaces and implement them in classes to support flexible behavior. Practice method overriding to customize behavior in subclasses and use method overloading to define multiple forms of a method within the same class. You’ll also explore constructor overloading to enable versatile object creation. These hands-on exercises will help you write more adaptable and reusable Java code.
Start Chapter
Introduction to Object-Oriented Programming in Java
Course
Complete

Earn Statement of Accomplishment

Add this credential to your LinkedIn profile, resume, or CV
Share it on social media and in your performance review
Enroll Now

Don’t just take our word for it

*4.8
from 941 reviews
83%
15%
2%
0%
0%
  • 25R11A6660
    1 hour ago

  • Syed Ali
    yesterday

    GOOD

  • Viviane
    2 days ago

  • Darl Shanen
    2 days ago

  • Eduardus Albert
    2 days ago

  • Christian
    2 days ago

"GOOD"

Syed Ali

Viviane

Darl Shanen

FAQs

What Java experience do I need before this course?

You should complete Introduction to Java and Intermediate Java first. This course builds on your knowledge of Java syntax, variables, and control flow.

What OOP concepts does this course cover?

You will learn classes, objects, fields, constructors, methods, encapsulation, inheritance, abstraction, interfaces, and polymorphism, progressing from basic class design to advanced type flexibility.

Why is object-oriented programming important for Java developers?

OOP is the foundation of Java development. It lets you model real-world systems with organized, reusable code that is easier to maintain and scale.

Does this course cover interfaces and polymorphism?

Yes. The third chapter focuses on Java interfaces and polymorphism, teaching you how to define contracts and write flexible code that works with multiple types.

How long does this course take?

The course has 3 chapters and 28 exercises. Most learners complete it in about 1.5 hours.

Join over 19 million learners and start Introduction to Object-Oriented Programming in Java today!

Create Your Free Account

or

By continuing, you accept our Terms of Use, our Privacy Policy and that your data is stored in the USA.

Grow your data skills with DataCamp for Mobile

Make progress on the go with our mobile courses and daily 5-minute coding challenges.