CJ_Slip3B

Slip No.3

B) B) Define an abstract class Shape with abstract methods area () and volume (). Derive abstract class Shape into two classes Cone and Cylinder. Write a java Program to calculate area and volume of Cone and Cylinder.(Use Super Keyword.)

1. Open Notepad.

2. Type the following code:

// Abstract class Shape
abstract class Shape {
double radius, height;

// Constructor
Shape(double radius, double height) {
this.radius = radius;
this.height = height;
}

// Abstract methods
abstract void area();
abstract void volume();
}

// Cone class extending Shape
class Cone extends Shape {

Cone(double radius, double height) {
super(radius, height);
}

void area() {
double slantHeight = Math.sqrt((radius * radius) + (height * height));
double area = Math.PI * radius * (radius + slantHeight);
System.out.println("Cone Area: " + area);
}

void volume() {
double volume = (Math.PI * radius * radius * height) / 3;
System.out.println("Cone Volume: " + volume);
}
}

// Cylinder class extending Shape
class Cylinder extends Shape {

Cylinder(double radius, double height) {
super(radius, height);
}

void area() {
double area = 2 * Math.PI * radius * (radius + height);
System.out.println("Cylinder Area: " + area);
}

void volume() {
double volume = Math.PI * radius * radius * height;
System.out.println("Cylinder Volume: " + volume);
}
}

// Main class
public class ShapeTest {
public static void main(String[] args) {
Cone cone = new Cone(5, 10);
System.out.println("=== Cone ===");
cone.area();
cone.volume();

Cylinder cylinder = new Cylinder(5, 10);
System.out.println("\n=== Cylinder ===");
cylinder.area();
cylinder.volume();
}
}

3. Save the file with the name ShapeTest.java. Make sure to select "All Files" in the "Save as type" dropdown and add the .java extension manually.

4. Open the Command Prompt.

5. Compile the Java program by typing:
javac ShapeTest.java

6. Run the compiled Java program by typing:
java ShapeTest