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.

You need to submit the following things:

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

Answer 1

Thanks for the question.

Here is the completed code for this problem. Comments are included so that you understand whats going on. Let me know if you have any doubts or if you need anything to change.

Thank You !!

================================================================================================
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Scanner;

public class Patient {

    private String patientName;
    private String dob;
    private double weight;
    private double height;


    // constructor takes all the details - name, dob, height and weight
    public Patient(String patientName, String dob, double weight, double height) {
        this.patientName = patientName;
        this.dob = dob;
        if (weight < 0 || height < 0)
            throw new IllegalArgumentException("Invalid Weight/Height entered");
        this.weight = weight;
        this.height = height;
    }

    public String getPatientName() {
        return patientName;
    }

    public String getDob() {
        return dob;
    }

    public double getWeight() {
        return weight;
    }

    public double getHeight() {
        return height;
    }

    // calculate the BMI and returns the value
    public double calculateBMI() {

        return weight / (height * height);
    }


    public static void main(String[] args) {

        ArrayList<Patient> patients = new ArrayList<Patient>();
        Scanner scanner = new Scanner(System.in);

        // loop until user presses Q
        while (true) {
            System.out.print("Enter patient name: ");
            String patientName = scanner.nextLine();
            System.out.print("Enter birthdate(mm/dd/yyyy): ");
            String dob = scanner.nextLine();
            System.out.print("Enter weight (kg): ");
            double wt = scanner.nextDouble();
            System.out.print("Enter height (meters): ");
            double height = scanner.nextDouble();
            try {
                Patient aPatient = new Patient(patientName, dob, wt, height);
                patients.add(aPatient);
            } catch (IllegalArgumentException exception) {
                System.out.println(exception.getMessage());
            }
            scanner.nextLine();
            System.out.print("Do you want to quit(press q/Q):");
            String quit = scanner.nextLine();
            if (quit.equalsIgnoreCase("q")) break;
        }
        try {
            saveToFile(patients);
            System.out.println("Data saved in file successfully.");
        } catch (IOException e) {
            System.out.println("Unable to write datat to file.");
        }

    }

    // takes in the list of patient objects and write them to file

    private static void saveToFile(ArrayList<Patient> patients) throws IOException {

        PrintWriter writer = new PrintWriter(new FileWriter("F:\\patients.txt"));
        for (Patient patient : patients) {
            double bmi = patient.calculateBMI();

            StringBuilder builder = new StringBuilder();
            builder.append(patient.getPatientName()).append(",");
            builder.append(patient.getDob()).append(",");
            builder.append(patient.getHeight()).append(" meters,");
            builder.append(patient.getWeight()).append(" kg(s), ");
            if (bmi <= 18.5) builder.append("Insurance Category: Low");
            else if (bmi <= 24.9) builder.append("Insurance Category: Low");
            else if (bmi <= 29.9) builder.append("Insurance Category: High");
            else builder.append("Insurance Category: Highest");
            builder.append("\r\n");
            writer.write(builder.toString());
            writer.flush();

        }
        writer.close();

    }


}