Welcome to the Object Oriented Design Problems section of the Coding Problems lesson!

In this section, we will explore problems that involve designing solutions using object-oriented principles. Object-oriented design is a programming paradigm that allows us to model real-world objects as software objects. It focuses on encapsulation, inheritance, and polymorphism to create modular, reusable, and maintainable code.

As a senior engineer with intermediate knowledge of Java and Python, you likely have experience working with object-oriented programming concepts. You understand the benefits of using classes, objects, and methods to represent and interact with data.

Let's take a look at an example of a simple object-oriented design problem using Java:

1// Define a Square class
2class Square {
3    private int sideLength;
4
5    public Square(int sideLength) {
6        this.sideLength = sideLength;
7    }
8
9    public int getArea() {
10        return sideLength * sideLength;
11    }
12
13    public void setSideLength(int sideLength) {
14        this.sideLength = sideLength;
15    }
16}
17
18// Create an instance of the Square class
19Square square = new Square(5);
20
21// Calculate and display the area of the square
22System.out.println("Area of square: " + square.getArea());

In this example, we created a Square class with a private sideLength variable. The class has methods to calculate the area of the square and to set a new side length. We then created an instance of the Square class with a side length of 5 and calculated its area.

Object-oriented design problems often involve complex systems and require designing classes, relationships between classes, and methods to perform specific tasks. By practicing object-oriented design problems, you will enhance your problem-solving skills and become more adept at designing scalable and maintainable solutions using object-oriented principles.

Are you ready to dive into object-oriented design problems? Let's begin!

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class Square {

    private int sideLength;

​

    public Square(int sideLength) {

        this.sideLength = sideLength;

    }

​

    public int getArea() {

        return sideLength * sideLength;

    }

​

    public void setSideLength(int sideLength) {

        this.sideLength = sideLength;

    }

}

​

Square square = new Square(5);

System.out.println("Area of square: " + square.getArea());