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

// Square Sum
class SquareSum {

  // Method to sum the squares of three numbers
  double squareSum(double num1, double num2, double num3) {
    double sum = 0;

    num1 = num1 * num1;
    num2 = num2 * num2;
    num3 = num3 * num3;
    sum = num1 + num2 + num3;

    return sum;
  }
}

class Demo {

  public static void main(String args[]) {
    SquareSum sum = new SquareSum();
    System.out.println(sum.squareSum(2, 3, 4));
  }
}

// Square Sum
class SquareSum {

  // Method to square the sum of three numbers
  double squareSum(double num1, double num2, double num3) {
    double sum = 0;

    num1 = num1 * num1;
    num2 = num2 * num2;
    num3 = num3 * num3;
    sum = num1 + num2 + num3;

    return sum;
  }
}

## Explanation

As this is not very tricky.

* We calculated the squares of the passing numbers. 
* Added them.
* Returned their sum.

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This review provides a detailed analysis to solve the 'Square Numbers and Return their Sum' challenge.

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

Project: Doctor on Call

Object Oriented Programming in Java - Exam II

Solution Review: Square Numbers and Return their Sum

Solution