It seems that your browser is not supported by our application.

Challenge 1: Square Numbers and Return their Sum

Solution Review: Square Numbers and Return their Sum

Challenge 2: Calling a Constructor from a Constructor

Solution Review: Calling a Constructor from a Constructor

Challenge 3: Calculate the Student's Total Marks

Solution Review: Calculate the Student's Total Marks

Challenge 4: Calculate Distance Between Points

Solution Review: Calculate Distance Between Points

Challenge 5: Implement a Calculator Class

Solution Review: Implement a Calculator Class

Project: Amazon's Top 50 Bestselling Books Dataset

4 Lessons

Break apart the dataset of Amazon's Top 50 Bestselling Books to gain insights and perform analysis.

Data Hiding

8 Lessons

Apply your skills to encapsulate data and maintain access control in Java classes.

What is Data Hiding?

Encapsulation

Understanding Encapsulation Using Examples

Challenge 1: Implement the Rectangle Class Using the Concepts of Encapsulation

Solution Review: Implement the Rectangle Class Using the Concepts of Encapsulation

Challenge 2: Implement the Complete Student Class

Solution Review: Implement the Complete Student Class

Composition, Aggregation and Association

11 Lessons

Dig into relationships in OOP: association, aggregation, composition, and class dependencies.

Challenge 1: Associate Vehicle and Its Driver

Solution Review: Associate Vehicle and Its Driver

Challenge 2: Aggregate `Em All!

Solution Review: Aggregate `Em All!

Challenge 3: Playing with Cars and Engines!

Solution Review: Playing with Cars and Engines!

Conclusion

Project: Java Slam Dunk: Coding Skills Through Basketball

6 Lessons

Tackle Java coding skills by building a basketball tournament system analyzing teams and players.

Object Oriented Programming in Java - Exam I

Assessment

Inheritance

10 Lessons

Build on Java's inheritance concepts, syntax, super keyword usage, types, and advantages.

What is Inheritance?

The Syntax and Terminologies

Super Keyword

Types of Inheritance

Advantages of Inheritance

Challenge 1: Implement the Derived Class

Solution Review: Implement the Derived Class

Challenge 2: Implement the Parametrized Constructor

Solution Review: Implement the Parametrized Constructor

Polymorphism

13 Lessons

Step through the core concepts of polymorphism to enhance code flexibility and manageability.

What is Polymorphism?

Polymorphism in OOP

Method Overriding

Difference Between the Overloading and Overriding of Methods

Dynamic Polymorphism

Difference between Static and Dynamic Polymorphism

Challenge #1: Override a Method using the Super Keyword

Solution Review: Override a Method using the Super Keyword

Challenge 2: Implement and Override the Method

Solution Review: Implement and Override Method

Challenge 3: Implement an Account Class using Polymorphism

Solution Review: Implement an Account Class using Polymorphism

Abstract Classes and Interfaces

9 Lessons

Walk through abstract classes, interfaces, and multiple inheritance in Java with hands-on challenges.

What is Abstraction?

Abstract Classes and Methods

Interfaces

Multiple Inheritance

Challenge 1: Implement an Abstract Method in a Base Class

Solution Review: Implement an Abstract Method in a Base Class

Challenge 2: Implement an Interface

Solution Review: Implement an Interface

10.

Project: Doctor on Call

5 Lessons

Go hands-on with coding a healthcare application, managing appointments, doctors, and patient interactions.

Getting Started

Time To Code: Task I to Task V

Time To Code: Task VI to Task IX

Solution Review: Task I to Task V

Solution Review: Task VI to Task IX

Object Oriented Programming in Java - Exam II

Assessment

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Developed by MAANG Engineers

Every Educative resource is designed by our in-house team of ex-MAANG software engineers and PhD computer science educators — subject matter experts who’ve shipped production code at scale and taught the theory behind it. The goal is to get you hands-on with the skills you need to stay ahead in today's constantly evolving tech landscape. No videos, no fluff — just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

Looks a bit advance? Start here.

Course

Learn REST and SOAP API Test Automation in Java

Gain insights into performing REST and SOAP API test automation, writing API and integration tests from scratch, and preparing for test automation interviews with a downloadable framework.

3 h

intermediate

Course

Design a Test Automation Framework with Selenium and Java

Delve into designing a test automation framework using Java and Selenium. Learn about Selenium basics, TestNG, build management, logging, and reporting to automate web applications effectively.

12 h

beginner

Course

Java Unit Testing with JUnit 5

Gain insights into configuring and utilizing JUnit 5 for Java unit testing. Learn about writing effective unit tests, integrating assertions, assumptions, parameterized tests, and their significance.

5 h

intermediate

Course

Grokking the Coding Interview Patterns

Master 24 essential coding patterns to solve thousands of LeetCode-style questions. Efficiently prepare for coding interviews with the ultimate course created by FAANG engineers.

85 h

intermediate

Learn REST and SOAP API Test Automation in Java

3 hour

Design a Test Automation Framework with Selenium and Java

beginner

12 hour

Java Unit Testing with JUnit 5

5 hour

Grokking the Coding Interview Patterns

85 hour

Trusted by 2.6 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks"

Anthony Walker

@_webarchitect_

"Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!"

Evan Dunbar

ML Engineer

"You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it."

Carlos Matias La Borde

Software Developer

"I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site"

Souvik Kundu

Front-end Developer

"Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content."

Vinay Krishnaiah

Software Developer

"I've tried probably 5-7 different sites and Educative is easily the best. It perfectly blends explanation with interactivity"

Eric Downs

Musician/Entrepeneur

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Instant Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

AI-Powered Mock Interviews

Put your skills to the test in a simulated interview setting. Receive personalized feedback based on your performance. Available in Premium & Premium Plus plans.

Adaptive Learning

At various checkpoints throughout Educative courses, you will be prompted to take a quick assessment. Receive a condensed curriculum tailored to your strengths and skill gaps.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Course

Learn Object-Oriented Programming in Python

Gain insights into writing cleaner, modular, and scalable Python code through Object-Oriented Programming. Dive into inheritance, polymorphism, and more with coding challenges and illustrations.

6 h

intermediate

Course

Learn Object-Oriented Programming in C#

Gain insights into OOP with C#. Delve into practical coding examples and exercises, exploring OOP concepts through a real-world vending machine project to understand and apply them effectively.

9 h

intermediate

Course

Learn Object-Oriented Programming in C++

Delve into Object-Oriented Programming in C++ and discover key concepts like classes, objects, inheritance, and polymorphism to create efficient, reusable, and secure code through hands-on challenges.

6 h

intermediate

Course

Learn Object-Oriented Programming in JavaScript

Gain insights into writing cleaner, modular, scalable JavaScript code through OOP. Explore basics to advanced concepts like prototypal inheritance, method overriding, and ES6 features.

3 h

intermediate

Learn Object-Oriented Programming in Python

6 hour

Learn Object-Oriented Programming in C#

9 hour

Learn Object-Oriented Programming in C++

6 hour

Learn Object-Oriented Programming in JavaScript