Question

Define a class named Payment that contains an instance variable "paymentAmount" (non-static member variable) of type double that stores the amount of the payment and appropriate accessor (getPaymentAmount() ) and mutator methods. Also create a method named paymentDetails that outputs an English sentence to describe the amount of the payment. Override toString() method to call the paymentDetails() method to print the contents of payment amount and any other details not included in paymentDetails().

Define a class named CashPayment that is derived from Payment. This class will have an additional instance variable of type String (a non-static member variable) that specifies a type of currency, such as "dollar", "euro", "peso", "yen", etc. This class should override the paymentDetails method to indicate that the payment is in cash, and the type of currency used. Include appropriate constructor(s) and accessor/mutator methods for all instance variablesand. Override toString() with contents of cash payment details (should still call paymentDetails()). Define a class named CreditCardPayment that is derived from Payment. This class should contain instance variables (member variables) for the name on the card, expiration date, and credit card number. Include appropriate constructor(s) and accessor/mutator methods for all instance variables.

Finally, redefine thepaymentDetails method to include all credit card information in the printout. Override toString() method with contents of credit payment details (should still call paymentDetails()). Create a main method within Payment that creates at least two CashPayment and two CreditCardPayment objects with different values and payment amounts. Call toString() methods from each object to print the details of each payment.

For an additional challenge: Use an array of Payment type references to represent your objects. Use a "for" loop to show the contents of each Payment.

Programming Language for this problem needs to be in JAVA. Hopefully it runs without any errors on Eclipse.

Answer 1

Java Program:

package paymentdriver;

//Payment class

class Payment {
private double paymentAmount;

//Default Constructor
public Payment() {
this.paymentAmount = 0;
}
  
//Arg Constructor
public Payment(double paymentAmount) {
this.paymentAmount = paymentAmount;
}
  
//Properties
public double getPaymentAmount() {
return paymentAmount;
}

public void setPaymentAmount(double paymentAmount) {
this.paymentAmount = paymentAmount;
}
  
//Payment details method
public void paymentDetails()
{
System.out.println("\n Payment Amount: " + this.paymentAmount);
}

@Override
public String toString() {
return "Payment{" + "paymentAmount=" + paymentAmount + '}';
}
}

//Child class 1

class CashPayment extends Payment
{
private String type;

public CashPayment(String type) {
this.type = type;
}

public CashPayment(String type, double paymentAmount) {
super(paymentAmount);
this.type = type;
}
  
//Payment details method
public void paymentDetails()
{
System.out.println("\n Cash Payment Amount: " + getPaymentAmount() + " " + this.type);
}

@Override
public String toString() {
return "CashPayment{" + "Amount: " + getPaymentAmount() + ", type=" + type + '}';
}
}

//Child class 2

class CreditCardPayment extends Payment
{
private String nameOnCard;
private String expDate;
private String creditCardNumber;

public CreditCardPayment(String nameOnCard, String expDate, String creditCardNumber) {
this.nameOnCard = nameOnCard;
this.expDate = expDate;
this.creditCardNumber = creditCardNumber;
}

public CreditCardPayment(String nameOnCard, String expDate, String creditCardNumber, double paymentAmount) {
super(paymentAmount);
this.nameOnCard = nameOnCard;
this.expDate = expDate;
this.creditCardNumber = creditCardNumber;
}
  
//Payment details method
public void paymentDetails()
{
System.out.println("\n Card Payment: \n Name on Card: " + this.nameOnCard + "\n Card Number: " + this.creditCardNumber + "\n Expiry Date: " + this.expDate + " Amount: " + getPaymentAmount() + " \n");
}

@Override
public String toString() {
return "CreditCardPayment{ Amount: " + getPaymentAmount() + ", nameOnCard=" + nameOnCard + ", expDate=" + expDate + ", creditCardNumber=" + creditCardNumber + '}';
}
}

public class PaymentDriver {
public static void main(String[] args) {
  
//Creating objects
CashPayment cObj1 = new CashPayment("dollar");
CashPayment cObj2 = new CashPayment("euro");
  
//Assigning payment
cObj1.setPaymentAmount(250);
cObj2.setPaymentAmount(345);
  
System.out.println(cObj1);
System.out.println(cObj2);
  
CreditCardPayment crObj1 = new CreditCardPayment("John Nick", "08-06-2022", "3265 6478 9855 6547");
CreditCardPayment crObj2 = new CreditCardPayment("Mary Lee", "01-02-2032", "5984 6598 6664 8955");
  
//Assigning payment
crObj1.setPaymentAmount(980);
crObj2.setPaymentAmount(748);
  
System.out.println(crObj1);
System.out.println(crObj2);
  
}
}
____________________________________________________________________________________________

Sample Run:

Output - PaymentDriver (run) * run: CashPayment Amount: 250.0, type=dollar) CashPayment Amount: 345.0, type=euro} CreditCardPayment { Amount: 980.0, nameOnCard=John Nick, expDate=08-06-2022, credit CardNumber=3265 6478 9855 6547) Credit CardPayment Amount: 748.0, nameOnCard=Mary Lee, expDate=01-02-2032, creditcardNumber=5984 6598 6664 8955} BUILD SUCCESSFUL (total time: 0 seconds)