Question

You are working as a software developer for a large insurance company. Your company is planning to migrate the existing systems from Visual Basic to Java and this will require new calculations. You will be creating a program that calculates the insurance payment category based on the BMI score.

Your Java program should perform the following things:

1. Take the input from the user about the patient name, weight, birthdate, and height.
2. Calculate Body Mass Index.
3. Display person name and BMI Category.
   1. If the BMI Score is less than 18.5, then underweight.
   2. If the BMI Score is between 18.5-24.9, then Normal.
   3. If the BMI score is between 25 to 29.9, then Overweight.
   4. If the BMI score is greater than 29.9, then Obesity.
4. Calculate Insurance Payment Category based on BMI Category.
   1. If underweight, then insurance payment category is low.
   2. If Normal weight, then insurance payment category is low.
   3. If Overweight, then insurance payment category is high.
   4. If Obesity, then insurance payment category is highest.
5. Implement exception handling.
6. Store all the information in the file. You need to use the loop and keep asking users to enter patient name, height, weight, and birthdate. Your program should calculate BMI Category and Insurance payment category and write it to the file. Your program should stop once user enter q character.
7. Create an interface called as the patient and then implement the interface as well as all the above methods.
8. Store all the patient name in the queue data structure using the enqueue method and use the dequeue to remove patient name from the queue data structure and print it. You should notice the first in first out concept.

You need to submit the following things:

• An entire Java solution
• An output screenshot created using Microsoft Word

Answer 1

/********************************BMI.java*********************************************/

import java.util.LinkedList;
import java.util.Queue;
import java.util.Scanner;

interface Patient {

   public String displayBMICategory(double bmi);

   public String displayInsuranceCategory(double bmi);
}

public class BMI implements Patient {

   public static void main(String[] args) {

       /*
       * local variable for saving the patient information
       */
       double weight = 0;
       String birthDate = "", name = "";
       int height = 0;
       Scanner scan = new Scanner(System.in);
       String cont = "";
       Queue<String> patients = new LinkedList<>();

       // do while loop for keep running program till user not entered q
       do {

           System.out.print("Press Y for continue (Press q for exit!) ");
           cont = scan.nextLine();
           if (cont.equalsIgnoreCase("q")) {

               System.out.println("Thank you for using BMI calculator");
               break;
           }
           System.out.print("Please enter patient name: ");
           /*
           * try catch block for valid data for weight catch block for null value catch
           * block for divide by zero exception if height is zero finally block
           */
           try {
               name = scan.nextLine();
               System.out.print("Please enter the weight of the patient in kg: ");
               weight = scan.nextDouble();
               scan.nextLine();
               System.out.print("Please entet the birth date of patient: ");
               birthDate = scan.nextLine();
               System.out.print("Please enter the height of patient in cm: ");
               height = scan.nextInt();
               scan.nextLine();
           } catch (NumberFormatException e) {
               System.out.println("Please enter valid data!");
           } catch (ArithmeticException e) {
               System.out.println("Height can not be zero!");
           } catch (NullPointerException e) {
               System.out.println("Name can not be blank!");
           } finally {
               System.out.println("Welcome to BMI calculator!!");
           }
           // calculate height in meter
           double heightInMeter = (double) height / 100;
           // calculate BMI
           double bmi = weight / (heightInMeter * heightInMeter);

           /*
           * Print the patient name and date of birth print the patient BMI category print
           * the patient insurance payment category
           */
           Patient patient = new BMI();
           patients.add(name);
           System.out.println("Patient " + name + " and Date of birth is - " + birthDate
                   + "\nPatient BMI category is - " + patient.displayBMICategory(bmi));
           System.out.println("And Patient insurance payment category is - " + patient.displayInsuranceCategory(bmi));
       } while (!cont.equalsIgnoreCase("q"));

       System.out.println("WaitingQueue : " + patients);
       String patientName = patients.remove();
       System.out.println("Removed from WaitingQueue : " + patientName + " | New WaitingQueue : " + patients);
       scan.close();
   }

   @Override
   public String displayBMICategory(double bmi) {
       String bmiCategory = "";
       if (bmi <= 18.5) {
           bmiCategory = "underweight";

       } else if (bmi > 18.5 && bmi <= 24.9) {
           bmiCategory = "Normal";

       } else if (bmi > 25 && bmi <= 29.9) {
           bmiCategory = "Overweight";

       } else if (bmi > 29.9) {
           bmiCategory = "Obesity";

       }
       return bmiCategory;
   }

   @Override
   public String displayInsuranceCategory(double bmi) {
       /*
       * set Insurance Payment category as BMI category
       */
       String insuranceCategory = "";
       if (bmi <= 18.5) {

           insuranceCategory = "Low";
       } else if (bmi > 18.5 && bmi <= 24.9) {

           insuranceCategory = "Low";
       } else if (bmi > 25 && bmi <= 29.9) {

           insuranceCategory = "High";
       } else if (bmi > 29.9) {

           insuranceCategory = "Highest";
       }
       return insuranceCategory;
   }
}

/***********************************output*****************************************/

Press Y for continue (Press q for exit!) y
Please enter patient name: Vishal
Please enter the weight of the patient in kg: 78
Please entet the birth date of patient: 05/10/1993
Please enter the height of patient in cm: 180
Welcome to BMI calculator!!
Patient Vishal and Date of birth is - 05/10/1993
Patient BMI category is - Normal
And Patient insurance payment category is - Low
Press Y for continue (Press q for exit!) y
Please enter patient name: JKS
Please enter the weight of the patient in kg: 67
Please entet the birth date of patient: 03/04/1992
Please enter the height of patient in cm: 178
Welcome to BMI calculator!!
Patient JKS and Date of birth is - 03/04/1992
Patient BMI category is - Normal
And Patient insurance payment category is - Low
Press Y for continue (Press q for exit!) y
Please enter patient name: Messi
Please enter the weight of the patient in kg: 89
Please entet the birth date of patient: 05/11/1989
Please enter the height of patient in cm: 167
Welcome to BMI calculator!!
Patient Messi and Date of birth is - 05/11/1989
Patient BMI category is - Obesity
And Patient insurance payment category is - Highest
Press Y for continue (Press q for exit!) q
Thank you for using BMI calculator
WaitingQueue : [Vishal, JKS, Messi]
Removed from WaitingQueue : Vishal | New WaitingQueue : [JKS, Messi]

Please let me know if you have any doubt or modify the answer, Thanks :)