Question

Write a Java application that implements the following class(es) as per business requirements mentioned below:

Create an abstract Insurance class (Insurance.java) that has the following instance variables:

- Insurance number,

- customer name,

- start date of policy ( This should be represented by an object of predefined date class in java),

- customer address [( Create a new Address class ( Address.java ) having following instance data members: House number , Street name, City, Province, Zip code. Implement getter and setter and toString() method for Address class. )]

- Define getter and setter along with validations for all the above instance variables.

- Insurance class should have defined two overloaded constructors: o One for initializing all the instance data members to their default values

o Second for initializing only Insurance number, customer name, start date of policy and address

- Declare an abstract public method double MonthlyPayments() which is used for calculating monthly Insurance installment amount.

- Define toString() to display the values

Create following two subclasses of Insurance class:

•               a) LifeInsurance (LifeInsurance.java)

•               b) VehicleInsurance (VehicleInsurance .java)

For LifeInsurance class, implement the following:

- Define an instance variable – age of the person. Minimum is 1 and Max is 100.

- Define another Boolean variable – smoker.

- Define getters and setters for the above and validations.

- A constructor for initializing all the instance variables with appropriate values.

- Overriding the method - double MonthlyPayments () which calculates monthly insurance installment.

- Business requirements for calculating the yearly insurance – if the person is <= 25 years of age, then yearly insurance amount is $1500.00. if between 26 and 45, then it is 1.5 times and if above 45, then it is two times of the amount. And if the person is smoker, then add $250.00 to yearly insurance amount but if a person is non-smoker, then give 5% discount on yearly insurance amount before calculating the monthly installment. You need to add GST also which is 13%.

- You need to override toString() method to display the object’s data.

For VehicleInsurance class, implement the following:

- Define an instance variable – model year. It cannot be more than 2020 which is current year. And vehicle cannot be older than 15 years. So if current year is 2020 then model year should >= 2005.

- Define another Boolean instance variable – greenVehicle. (yes – means – electric, no means gasoline)

- Constructor for initializing all the instance variables

- Overriding the method - double MonthlyPayments () which calculates monthly vehicle insurance installment

- Business requirements for calculating the yearly insurance – if the vehicle is <= 5, then yearly insurance amount is $3000.00. if between 6 and 10, then 1.5 times and if above 10, then it two times of the amount. And if the vehicle is not green, then add $300.00 as environment fee to yearly insurance amount but if a vehicle is green, then give 10% discount on yearly insurance amount. You need to add GST also which is 13%.

- You need to override toString() method to display the object’s data.

Create a driver class – InsuranceTest (InsuranceTest.java) which tests above classes by at least creating two objects each of the LifeInsurance and VehicleInsurance classes and then processing them normally and polymorphically

Answer 1

All the java files to implement the above functionality is as below:

Address.java

public class Address {
        private int houseNumber;
        private String streetName;
        private String city;
        private String province;
        private String zipCode;
        
        public Address(){
                
        }
        
        public Address(int houseNumber, String streetName, String city, String province, String zipCode) {
                this.houseNumber = houseNumber;
                this.streetName = streetName;
                this.city = city;
                this.province = province;
                this.zipCode = zipCode;
        }
        
        public int getHouseNumber() {
                return houseNumber;
        }
        public String getStreetName() {
                return streetName;
        }
        public String getCity() {
                return city;
        }
        public String getProvince() {
                return province;
        }
        public String getZipCode() {
                return zipCode;
        }
        public void setHouseNumber(int houseNumber) {
                this.houseNumber = houseNumber;
        }
        public void setStreetName(String streetName) {
                this.streetName = streetName;
        }
        public void setCity(String city) {
                this.city = city;
        }
        public void setProvince(String province) {
                this.province = province;
        }
        public void setZipCode(String zipCode) {
                this.zipCode = zipCode;
        }
        
        public String toString(){
                return this.houseNumber+", "+this.streetName+", "+this.city+", "+this.province+", "+this.zipCode;
        }
        
        
}

Insurance.java

import java.text.SimpleDateFormat;
import java.util.Date;

public abstract class Insurance {
     
        private int insuranceNumber;
        private String customerName;
        private Date startDateOfPolicy;
        private Address customerAddress;
        SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");      
        public Insurance() {
        this.insuranceNumber=0;
        this.customerName="";
        this.startDateOfPolicy= new Date();
        this.customerAddress= new Address();
        }
        
        public Insurance(int insuranceNumber, String customerName, Date startDateOfPolicy, Address customerAddress) {
                
                this.insuranceNumber = insuranceNumber;
                this.customerName = customerName;
                this.startDateOfPolicy = startDateOfPolicy;
                this.customerAddress = customerAddress;
                
        }

        public int getInsuranceNumber() {
                return insuranceNumber;
        }

        public String getCustomerName() {
                return customerName;
        }

        public Date getStartDateOfPolicy() {
                return startDateOfPolicy;
        }

        public Address getCustomerAddress() {
                return customerAddress;
        }

        public void setInsuranceNumber(int insuranceNumber) {
                this.insuranceNumber = insuranceNumber;
        }

        public void setCustomerName(String customerName) {
                this.customerName = customerName;
        }

        public void setStartDateOfPolicy(Date startDateOfPolicy) {
                this.startDateOfPolicy = startDateOfPolicy;
        }

        public void setCustomerAddress(Address customerAddress) {
                this.customerAddress = customerAddress;
        }
        
        public String toString(){
                return this.customerName+"  "+this.insuranceNumber+"  "+sdf.format(this.startDateOfPolicy)+"  "+this.customerAddress.toString();
        }
        
        public abstract double monthlyPayments();
        
        
}

LifeInsurance.java

import java.text.SimpleDateFormat;
import java.util.Date;

public class LifeInsurance extends Insurance {
        
        private int age;
        private boolean smoker;
        SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
        
        public LifeInsurance(int insuranceNumber, String customerName, Date startDateOfPolicy, Address customerAddress,int age, boolean smoker) throws Exception {
                super(insuranceNumber,customerName,startDateOfPolicy, customerAddress);
                if(age<0 || age>100)
                        throw new Exception("Invalid Age");
                this.age = age;
                this.smoker = smoker;
        }

        public int getAge() {
                return age;
        }

        public boolean isSmoker() {
                return smoker;
        }

        public void setAge(int age) throws Exception {
                if(age<0 || age>100)
                        throw new Exception("Invalid Age");
                this.age = age;
        }

        public void setSmoker(boolean smoker) {
                this.smoker = smoker;
        }

        public double monthlyPayments() {
                double yearlyInsAmount;
                int age = getAge();
                if(age<=25)
                        yearlyInsAmount=1500;
                else if(age>=26 && age<=45)
                        yearlyInsAmount=1.5 * 1500;
                else
                        yearlyInsAmount=2*1500;
                
                if(smoker)
                        yearlyInsAmount=yearlyInsAmount+0.08*yearlyInsAmount;  //GST - NONSMOKER discount
                else
                        yearlyInsAmount=yearlyInsAmount+0.13*yearlyInsAmount;  //GST
                
                return yearlyInsAmount/12;
        }
        
        public String toString(){  //you can modify to any format you needed
                return this.getCustomerName()+"  "+this.getInsuranceNumber()+"  "+sdf.format(this.getStartDateOfPolicy())+"  "+this.getCustomerAddress().toString() +" has to pay monthly $"+this.monthlyPayments();
        }

}

VehicleInsurance.java

import java.text.SimpleDateFormat;
import java.util.Date;

public class VehicleInsurance extends Insurance {

        int modelYear;
        boolean greenVehicle;
        SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
        
        public VehicleInsurance(int insuranceNumber, String customerName, Date startDateOfPolicy, Address customerAddress,int modelYear, boolean greenVehicle) throws Exception {
                super(insuranceNumber,customerName,startDateOfPolicy, customerAddress);
                if(modelYear<2005 || modelYear>2020)
                        throw new Exception("Invalid model year");
                this.modelYear = modelYear;
                this.greenVehicle = greenVehicle;
        }
        
        public double monthlyPayments() {
                int modelYear=this.modelYear;
                double yearlyInsuAmount;
                if(modelYear>2015)
                        yearlyInsuAmount=3000;
                else if(modelYear>2010)
                        yearlyInsuAmount=1.5 * 3000;
                else
                        yearlyInsuAmount=2 * 3000;
                        
                if(greenVehicle)
                        yearlyInsuAmount=yearlyInsuAmount+0.03*yearlyInsuAmount; //GST - Green Vehicle discount
                else
                        yearlyInsuAmount=yearlyInsuAmount+0.13*yearlyInsuAmount; //GST
                
                return yearlyInsuAmount/12;
        }

        public String toString(){  //you can modify to any format you needed
                return this.getCustomerName()+"  "+this.getInsuranceNumber()+"  "+sdf.format(this.getStartDateOfPolicy())+"  "+this.getCustomerAddress().toString() +" has to pay monthly $"+this.monthlyPayments();
        }

}

InsuranceTest.java

import java.text.SimpleDateFormat;
import java.util.Date;

public class InsuranceTest {
        
        public static void main(String[] args) throws Exception{
                        
                LifeInsurance l1 = new LifeInsurance(1, "Angel", new Date("11/11/2016"), new Address(21,"xy Street","Washington","yy","36722"), 43, true);
                System.out.println(l1.toString());
                
                LifeInsurance l2 = new LifeInsurance(2, "Luis", new Date("11/11/2006"), new Address(89,"MNB Street","Aleaska","dja","36782"), 67, true);
                System.out.println(l2.toString());
                
                VehicleInsurance v1 = new VehicleInsurance(3, "Lopez", new Date("11/11/2018"), new Address(81,"xy Street","Washington","yy","36722"), 2013, true);
                System.out.println(v1.toString());
                
                VehicleInsurance v2 = new VehicleInsurance(4, "Arun", new Date("11/11/2007"), new Address(341,"MNB Street","Aleaska","dja","36782"), 2007, true);
                System.out.println(v2.toString());              
        }
}

The output screenshots is as below: