Page 125 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

System.out.println(“Area of the rectangle: “ + rectangle.calculateArea());
}
}

Output:

Explanation:
• In this program, we define a class Rectangle with attributes length and width.
• We provide a default constructor for the Rectangle class, which initializes the length and width attributes to
zero.
• In the main method, we create an instance of the Rectangle class using the default constructor.
• We call the calculateArea method of the Rectangle class to calculate and display the area of the rectangle.

TASK 2: Default Constructor with Initialization: Area of a Circle

//Area of a Circle using Default Constructor with Initialization
class Circle {
double radius;
// Default constructor
Circle() {

radius = 1.0; // Initialize radius to a default value
}
// Method to calculate the area of the circle
double calculateArea() {
return Math.PI * radius * radius;

}
}
public class Circle_Demo {
public static void main(String[] args) {

// Creating an instance of Circle using the default constructor
Circle circle = new Circle();
// Displaying the area of the circle
System.out.println(“Area of the circle: “ + circle.calculateArea());

110

CITS : IT & ITES - Computer Software Application - Exercise 97