Skip to main content
Ibdelli Eya avatar

Ibdelli Eya has completed

Introduction to Object-Oriented Programming in Java

Start course For Free
4 hr
2,350 XP
Statement of Accomplishment Badge

Loved by learners at thousands of companies

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.

For Business

Training 2 or more people?

Get your team access to the full DataCamp platform, including all the features.
DataCamp for BusinessFor a bespoke solution book a demo.
  1. 1

    Object-Oriented Programming (OOP) in Java

    Free

    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.

    Play Chapter Now
    Welcome
    50 xp
    Defining a car class
    100 xp
    Creating car class object instance
    100 xp
    Adding properties
    50 xp
    Add properties to car class
    100 xp
    Creating a constructor for car class
    100 xp
    Adding parameters to car class constructor
    100 xp
    Class methods
    50 xp
    Working with void methods
    100 xp
    Adding class methods with return types
    100 xp
  2. 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.

    Play Chapter Now
    Encapsulation & access modifiers
    50 xp
    Public class fields
    100 xp
    Creating private properties
    100 xp
    Making methods private
    100 xp
    Creating a static formula class
    100 xp
    Centralising code with inheritance
    50 xp
    Inheriting the car class
    100 xp
    Making the car class abstract
    50 xp
    Creating abstract classes
    100 xp
    Implementing abstract methods
    100 xp
  3. 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.

    Play Chapter Now
    Interfaces in Java
    50 xp
    Creating methods in interfaces
    100 xp
    Implementing interface on Tesla class
    100 xp
    Introduction to polymorphism
    50 xp
    Overriding methods
    100 xp
    Overloading methods
    100 xp
    Constructor overloading
    100 xp
    Wrap-up
    50 xp
For Business

Training 2 or more people?

Get your team access to the full DataCamp platform, including all the features.

collaborators

Collaborator's avatar
George Boorman
Collaborator's avatar
Arne Warnke
Collaborator's avatar
Katerina Zahradova

prerequisites

Intermediate Java
Miller Andrés Trujillo Achury HeadshotMiller Andrés Trujillo Achury

Senior Software Engineer at Microsoft

Miller is a senior software Engineer at Microsoft and a professor at Universidad de los Andes, with a previous role at Google, that allowed him to sharpen his skills in data engineering, employing tools like Python, Java, and SQL, and cloud providers like AWS, Azure, and GCP. Miller's work approach is rooted in collaboration and constant learning. His work includes creating various data solutions for diverse clients including healthcare ones. Those solutions range from simple pipelines to libraries for data validation or platform tools for other data engineers, reflecting his commitment to practical, user-focused solutions.
See More
Sani Yusuf HeadshotSani Yusuf

Lead Content Developer

Sani is a content developer at Datacamp. Sani has a wealth of software engineering experience across mobile & web domains as a founder and CTO. He is also a published author with multiple books/courses and loves doing developer community work.
See More

Join over 18 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.