Question

How to create a menu-driven program in java?

Answer 1

ram for menu driven system in java.

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//import Scanner as we require it.

import java.util.Scanner;

 

// the name of our class its public

public class MenuDrivenSystem {

    //void main

        public static void main (String[] args)

        {

            //declare float

            float a,b,area = 0;

            char choice;

            //Declare input as scanner

            Scanner input = new Scanner(System.in);

 

            //Take inputs

             System.out.println("Enter c for circle.");

             System.out.println("Enter s for square.");

             System.out.println("Enter r for rectangle.");

             System.out.println("Enter t for triangle.");

             String s = input.next();

             choice = s.charAt(0);

 

             //add a switch statement

             switch(choice)

             {

             case 'c':

                 System.out.println("Enter radius:");

                 a = input.nextFloat();

                 area = 3.14f*a*a;

                 break;

             case 's':

                 System.out.println("Enter side:");

                 a = input.nextFloat();

                 area = a*a;

                 break;

             case 'r':

                 System.out.println("Enter length and breadth:");

                 a = input.nextFloat();

                 b = input.nextFloat();

                 area = a*b;

                 break;

             case 't':

                 System.out.println("Enter base and height:");

                 a =input.nextFloat();

                 b =input.nextFloat();

                 area = 0.5f*a*b;

                 break;

             default:

                System.out.println("Error");

             }

 

             System.out.println("Area = "+area);

        }