Question

Write a java program to create a class named shape. In this class we have two sub classes circle and square.

Answer 1

//class Shape
class Shape
{
void getInput()
{
  
}
void calculateArea()
{
  
}
}

//class Circle
class Circle extends Shape
{
public int r;
public double pi = 3.14;
double area;

public void getInput(int radius)
{
r = radius;
}

//method to calculate area
public void calculateArea()
{
area = pi * r * r;
System.out.println("Area of the circle: "+area);
}
}

//clase square
class Square extends Shape
{
int s;
double area;
public void getInput(int side)
{
s = side;
}
  
//method to calculate area
public void calculateArea()
{
area = s * s;
System.out.println("Area of the rectangle: "+ area);
}
}

public class Main
{
   public static void main(String[] args)
   {
   //create class object
   Circle cir = new Circle();
  
   //call method
   cir.getInput(10);
   cir.calculateArea();
  
   //create Square class object
       Square rec = new Square();
      
       //call method
rec.getInput(10);
rec.calculateArea();
   }
}

OUTPUT: