Question
below is my java code for the following assignment below. i have to edit the following i have to make sure that All Condition listed
below is my java code for the following assignment below.
i have to edit the following
i have to make sure that All Condition listed in Constraints should be private methods
Consider using the .replaceAll() method to remove slashes and/or dashes from entered Strings
Set methods must be private
All Condition listed in Constraints should be private methods
Use a regex String for Condition 1
Most Condition methods will use an if statement
Condition methods 4-6 will need one to two for loops to step through the int arrays
Consider using the .split() method when converting the Strings to int Arrays
The .parseInt() method and the Integer class can be your friend in this assignment
Assignment
a program that checks to see if a credit card number is valid.
Constraints
The credit card number (CC#) must be 16 digits in length
The CC# can be in either form: ####-####-####-#### or ################
The Expiration Date (Exp) must be in the form: MM/YY (Example: 12/15)
Notify user of correct entry form for CC# and Exp
Name, CC#, and Exp must be entered as Strings
Use a separate (external to the main class) subclass, VerifyCard() to validate the CC# with the following private method conditions:
- Condition 1: The first digit must be a 4
- Condition 2: The fourth digit must be one greater than the fifth digit
- Condition 3: The product of the first, fifth, and ninth digits must be 24
- Condition 4: The sum of all digits must be evenly divisible by 4
- Condition 5: The sum of the four digits in the expiration date must be less than the product of the last two digits of the card number
- Condition 6: The sum of the first four digits must be one less than the sum of the last four digits
- Condition 7: If you treat the first two digits as a two-digit number, and the 15th and 16th digits as a two digit number, their sum must be 100 (Example: 4643262531465454 -> 46 + 54 = 100)
Requirements
Ask the user for the name on the credit card
Ask the user for the credit card number
Ask the user for the expiration date
Use set and get methods in the subclass for the information entered by the user
Set methods must be private
All Condition listed in Constraints should be private methods
Use a regex String for Condition 1
Most Condition methods will use an if statement
Condition methods 4-6 will need one to two for loops to step through the int arrays
This program will utilize code learned from Week 1 through Week 10
Hints
CC# and Exp can be converted into int Arrays
The following CC#s can be used as test cases. Each of these numbers will return as valid. Make sure you change them around or enter other CC#s that are not valid:
- 4192112566331259
- 4283253533222358
- 4374398522116157
- 4292154566732358
- 4553223534333555
- 4643262531465454
- 4732169566119053
- 4823287533234752
Each of the CC#s will work with an Exp of 12/15. By increasing the YY, you may find that a few of these cards will not be valid
Consider using the .replaceAll() method to remove slashes and/or dashes from entered Strings
Consider using the .split() method when converting the Strings to int Arrays
The .parseInt() method and the Integer class can be your friend in this assignment
Expected Output
The sample output below has executed three runs of the program. User input is in red.
Enter Card Holder's Name: Tom Jones Enter Credit Card Number (No dashes): 4553223534333555 Enter Credit Card Expiration Date (MM/YY): 12/15
Card number: 4553223534333555 is a valid credit card.
Run program again? (Y for Yes, N for No): y Enter Card Holder's Name: Dean Martin Enter Credit Card Number (No dashes): 4732169566119053 Enter Credit Card Expiration Date (MM/YY): 12/15
Card number: 4732169566119053 is a valid credit card.
Run program again? (Y for Yes, N for No): Y Enter Card Holder's Name: Frank Sinatra Enter Credit Card Number (No dashes): 4234253533211358 Enter Credit Card Expiration Date (MM/YY): 12/15
Card number: 4234253533211358 is NOT a valid credit card.
Run program again? (Y for Yes, N for No): n Thank you. Goodbye!
import java.util.Scanner; public static void main(String[] args) {
//Declare object for the scanner class Scanner input = new Scanner(System.in);
//declare variables String aname;
String anumber;
String adate;
String choice;
//create object card of the class VerifyCard VerifyCard card = new VerifyCard();
//start do-while loop do {
//Prompt the message and input the values System.out.print("Enter Card Holder's Name: ");
aname = input.nextLine();
System.out.print("Enter Credit Card Number (No dashes): ");
anumber = input.nextLine();
//use replaceAll() method to remove dashes or slashes. String cardNumber = anumber.replaceAll("[^0-9]", "");
System.out.print("Enter Credit Card Expiration Date (MM/YY): ");
adate = input.nextLine();
//use replaceAll() method to remove slashes. String exDate = adate.replaceAll("[^0-9]", "");
card.displayValidity(cardNumber, exDate);
System.out.print(" Run Program again?(Y for Yes , N for No):"); choice = input.nextLine(); } while (choice.equalsIgnoreCase("y"));
System.out.println("Thank you.Goodbye!"); System.exit(0);
}
}
subclass
public class VerifyCard {
private int[] number; private String expDate; //set the number
private void setNumber(String n) { String num[] = n.split("(?!^)"); number = new int[16]; for (int i = 0; i < 16; i++) { number[i] = Integer.parseInt(num[i]); } } //set the date
private void setExpDate(String n) { expDate = n; } //Method to check whether first digit is 4 or not
private boolean checkfirstdigit() { String num = ""; for (int i = 0; i < number.length; i++) { num += number[i]; }
if (num.matches("^4([0-9]*)")) { return true; } else { return false; } } //Method to check whether fourth digit is greater than fifth
private boolean checkFourthGrtrFiftth() { int fourthdigit = number[3]; int fifthdigit = number[4]; if (fourthdigit > fifthdigit) { return true; } else { return false; } } //Method to check whether product of first,fifth and ninth is 24
private boolean checkProd159() { int product = 0; int firstdigit = number[0]; int fifthdigit = number[4]; int ninthdigit = number[8]; //calculate product product = firstdigit * fifthdigit * ninthdigit; //Check product is 24 or not if (product == 24) { return true; } else { return false; } } //Method to check The sum of all digits must be evenly divisible by 4
private boolean sumDivBy4() { int sum = 0; for (int i = 0; i < number.length; i++) { sum += number[i]; } if (sum % 4 == 0) { return true; } else { return false; } } //Method to check The sum of the four digits in the expiration date must be less //than the product of the last two digits of the card number
private boolean sum4LessProd2digits() { int sum = 0; int produnct = 0; for (int i = 0; i < expDate.length(); i++) { sum += (int) expDate.charAt(i) - '0'; } int lDig1 = number[number.length - 2]; int lDig2 = number[number.length - 1]; produnct = lDig1 * lDig2; if (sum < produnct) { return true; } else { return false; } } //Method to check that The sum of the first four digits must //be one less than the sum of the last four digits
private boolean sumFirst4LessSumLast4() { int firstsum = 0, lastsum = 0; for (int i = 0; i < 4; i++) { firstsum += number[i]; } for (int i = 4; i > 0; i--) { lastsum += number[number.length - i]; } if (lastsum == (firstsum + 1)) { return true; } else { return false; } } //Method to check whether sum of first two digit product and //last two digit is equal to 100 or not
private boolean first2Last2Sum100() { int firstdigit = number[0]; int seconddigit = number[1]; int f = firstdigit * 10; int f2 = f + seconddigit; int lastdigit = number[number.length - 1]; int last2digit = number[number.length - 2]; int z = last2digit * 10; int z2 = z + lastdigit; //calculate sum int val = f2 + z2; //check for equality whether true or not if (val == 100) { return true; } else { return false; } } //Define the method to display card validity
public void displayValidity(String num, String date) { setNumber(num); setExpDate(date); if (num.length() == 16 && checkfirstdigit() && checkFourthGrtrFiftth() && checkProd159() && sumDivBy4() && sum4LessProd2digits() && sumFirst4LessSumLast4() && first2Last2Sum100()) { System.out.print("Card number :"); for (int i = 0; i < number.length; i++) { System.out.print(number[i]); } System.out.print(" is a valid credit card"); } else { System.out.print("Card number :"); for (int i = 0; i < number.length; i++) { System.out.print(number[i]); } System.out.print(" is not a valid credit card");
} }
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