Demonstrate the Method Overloading feature of Object Oriented 

Programming using example of “calculate Volume of given objects” program.

Create a Volume class called by main class which contains method volume that 

calculate the volume of cube or cuboid or cylinder, depending on number of 

parameters. Read all the inputs from user. Result has to be printed in main class.

(CODE)

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

class Volume

{

   double volume(double l)

   {

      return l*l*l;

   }

   double volume(double r,double h)

   {

      return 3.14*r*r*h;

   }

   double volume(double l,double w,double h)

   {

      return l*w*h;

   }

   void printMenu()

   {

     System.out.println("Select One to Calculate Volume or Exit");

     System.out.println("1) Cube");

     System.out.println("2) Cuboid");

     System.out.println("3) Cylinder");

     System.out.println("4) Exit");

   }

}

public class lab3A1

{

    public static void main(String args[]) throws NumberFormatException, IOException

    {

       Volume v=new Volume();

       int option;

       boolean exit=false;

       BufferedReader br =new BufferedReader(new InputStreamReader(System.in));

       double answer,l,w,h,r;

       do

       {

          v.printMenu();

          try

          {

             option=Integer.parseInt(br.readLine().toString());

          }

          catch(Exception e)

          {

             option=5;

             System.out.println(e);

          }

          if(option==1)

          {

             System.out.println("Enter the Cube Length:");

             answer=v.volume(Double.parseDouble(br.readLine().toString()));

             System.out.println("The Volume of Cube is:"+answer);

          }

          else if(option==2)

          {

             System.out.println("Enter the Cuboid Length:");

             l=Double.parseDouble(br.readLine().toString());

             System.out.println("Enter the Cuboid Width:");

             w=Double.parseDouble(br.readLine().toString());

             System.out.println("Enter the Cuboid Height:");

             h=Double.parseDouble(br.readLine().toString());

             answer=v.volume(l,w,h);

             System.out.println("The Volume of Cuboid is:"+answer);

           }

           else if(option==3)

           {

             System.out.println("Enter the Cylinder Radius:");

             r=Double.parseDouble(br.readLine().toString());

             System.out.println("Enter the Cylinder Height:");

             h=Double.parseDouble(br.readLine().toString());

             answer=v.volume(r,h);

             System.out.println("The Volume of Cylinder is:"+answer);

            }

            else if(option==4)

            {

              exit=true;

              System.out.println("Closing Program");

            }

            else

            {

              System.out.println("Invalid Option");

             }

         }while(!exit);

   }

}

Write a program to demonstrate the inheritance feature of object oriented prgraming.

Create a class Circle and write methods to calculate area of a circle. Declare required fields. Write another class Cylinder which inherite the Circle class and write method to calculate volume of Cylinder useing it.

(CODE)

class Circle

{

   float radius;

   float pie;

   Circle()

   {

      this.pie=3.14f;

   }

   float area()

   {

      float ans;

      ans=this.pie*this.radius*this.radius;

      return ans;

   }

}

class Cylinder extends Circle

{

   float height;

    

   float volume()

   {

     float ans=area()*this.height;

     return ans;

   }

   

   Cylinder()

   {

     this.pie=3.14f;

   }

}

public class lab3A3

{

   public static void main(String args[])

   {

      Cylinder c= new Cylinder();

      c.radius= 4.5f;

      c.height=2.5f;

      System.out.println("Answer: "+c.volume());

   }

}