Explore the fundamentals of OOP in Java. Gain insights into inheritance, polymorphism, and more to write clean, modular, reusable code through interactive exercises and practical challenges.

cpp17.tar.gz

Object-oriented programming (OOP) has been around for decades. As the original object-oriented language, Java is a mainstay in the world of computer programming. 

Having a foundation in OOP Java concepts will allow you to write cleaner, more modular, and more reusable code, as well as make it easier for you to understand the codebases of different companies you might be interested in joining.

Starting with the basics and reviewing complex topics like inheritance and polymorphism, this course is filled with illustrations, exercises, quizzes, and hands-on challenges. You’ll walk away with an understanding of classes and objects behavior and be able to easily create simple, efficient, reusable and secure code.

Learn Object-Oriented Programming in Java

# Problem Statement

You are given an interface `Addition` which contains a method signature `int add(int num1, int num2).` You need to write a class called `Calculator` which implements the `Addition` interface.

The `add(int, int)` method takes two integers and returns their sum.

## Input
Calls the `add(int, int)` method by passing `num1` and `num2`.

## Output
Returns the addition of `num1` and `num2.`

## Sample Input

```Java
Calculator cal = new Calculator();
cal.add(10, 20);
```

## Sample Output

```Java
30
```



Can you implement an interface in your class? A solution is placed in the "solution" section to help you, but we would suggest you try to solve it on your own first.

Introduction to Object-Oriented Programming

Classes and Objects

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Data Hiding

Composition, Aggregation and Association

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Object Oriented Programming in Java - Exam I

Inheritance

Polymorphism

Abstract Classes and Interfaces

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Object Oriented Programming in Java - Exam II

Challenge 2: Implement an Interface

Problem Statement