Abstract and interface (area and perimeter)

GamerBhai02

Nov 11th, 2024

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interface ShapeOperations
{
double calculateArea();
double calculatePerimeter();
}
// Abstract class Shape
abstract class Shape implements ShapeOperations
{
// Abstract method to be implemented by subclasses
public abstract String getShapeName();
}
// Circle class
class Circle extends Shape
{
private double radius;
public Circle(double radius)
{
this.radius = radius;
}
@Override
public double calculateArea()
{
return Math.PI * radius * radius;
}
@Override
public double calculatePerimeter()
{
return 2 * Math.PI * radius;
}
@Override
public String getShapeName()
{
30
return "Circle";
}
}
// Rectangle class
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public double calculateArea() {
return width * height;
}
@Override
public double calculatePerimeter() {
return 2 * (width + height);
}
@Override
public String getShapeName() {
return "Rectangle";
}
}
// Square class
class Square extends Rectangle {
public Square(double side) {
super(side, side); // Call the Rectangle constructor
}
@Override
public String getShapeName() {
return "Square";
}
}
// Main class to test the shapes
public class ShapeCalculator {
public static void main(String[] args) {
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Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
Shape square = new Square(3);
// Display area and perimeter for each shape
displayShapeInfo(circle);
displayShapeInfo(rectangle);
displayShapeInfo(square);
}
private static void displayShapeInfo(Shape shape) {
System.out.println("Shape: " + shape.getShapeName());
System.out.println("Area: " + shape.calculateArea());
System.out.println("Perimeter: " + shape.calculatePerimeter());
System.out.println("---------------------------");
}
}

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