What to use in your completed code Get input from file. Ask user at least a sing
ID: 3825249 • Letter: W
Question
What to use in your completed code Get input from file.
Ask user at least a single question and read at least one answer.
Use at least a single method from Math class.
Use at least one overloaded constructor.
Use at least one if-else-if, while, for, and enhanced for loops.
Use methods to pass and return identifiers and objects.
Pass arrays to/from methods.
Use at least a method to sort the array in the project.
Use inheritance and polymorphism.
Use exception handling.
Use input validation.
Pass the input and output files as commandline arguments.
Final Project - Credit card numbers and the case of Mobius Duck In this project, you are assisting an investigation.
The investigator asked you to help him determine the validity of credit card numbers located in a case of Mobius Duck, case number 20150510-001. Y
our task is to: – Read the data listed below “Data to Evaluate” from a file.
– Evaluate each number to see if they are representing a possible credit card number.
– Validate each credit card number to see if they are a valid number.
– Store the valid numbers and invalid numbers in a separate array.
– Write the contents of validated credit card number array into a file called “valid_cards.txt”.
– Write the invalid credit card number array to a file called “invalid_numbers.txt”.
– Make sure to include the issuer for each group of credit card numbers identified.
– Your application should work with any number of credit card entries. Turn in:
– Source code ( .java ) files of all classes and driver class.
– Completed UML for application classes.
– Flow chart for every method that contains beyond sequential logic flow .
– Generated javadocs structure. – Input and output files Grading:
– Naming standard followed for project files – 2%
– Input and output files – 2%
– Javadoc structure – 5%
– Project compiled without error – 91%
– Proper use of internal comments, docstrings, and tags – 5%
– Self documenting field, identifier, method, static, final, and class identifiers - 5%
– Properly validated input and output files - 5%
– Properly used arrays to store data - 5%
– Correct output calculated by the Luhn algorithm and card number issuer identified – 71%
Extra Credit: - Implement the full Issuer IIN Range instead of the simplified list.
How to validate Credit Card Numbers?
Most credit card number can be validated using the Luhn algorithm, which is more or a less a glorified Modulo 10 formula!
The Luhn Formula: • Drop the last digit from the number.
The last digit is what we want to check against •
Reverse the numbers •
Multiply the digits in odd positions (1, 3, 5, etc.) by 2 and subtract 9 to all any result higher than 9
• Add all the numbers together
• The check digit (the last number of the card) is the amount that you would need to add to get a multiple of 10 (Modulo 10)
Luhn Example: Steps Total Total
Original Number: 4 5 5 6 7 3 7 5 8 6 8 9 9 8 5 5
Drop the last digit: 4 5 5 6 7 3 7 5 8 6 8 9 9 8 5
Reverse the digits: 5 8 9 9 8 6 8 5 7 3 7 6 5 5 4
Multiple odd digits by 2: 10 8 18 9 16 6 16 5 14 3 14 6 10 5 8
Add digits from line above 1 8 9 9 7 6 7 5 5 3 5 6 1 5 8
Add all numbers: 1 8 9 9 7 6 7 5 5 3 5 6 1 5 8 85
Mod 10: (85 + X) modulo 10 = 0 , thus X=5 (last digit of card)
List of credit card number formats Credit Card Issuer Starts With ( IIN Range ) Length ( Number of digits )
American Express 34, 37 15
Diners Club - Carte Blanche 300, 301, 302, 303, 304, 305 14
Diners Club - International 36 14
Diners Club - USA & Canada 54 16
Discover 6011, 622126 to 622925, 644, 645, 646, 647, 648, 649, 65 16
InstaPayment 637, 638, 639 16
JCB 3528 to 3589 16
Laser 6304, 6706, 6771, 6709 16-19
Maestro 5018, 5020, 5038, 5893, 6304, 6759, 6761, 6762, 6763 16-19
MasterCard 51, 52, 53, 54, 55 16-19
Visa 4 13-16
Visa Electron 4026, 417500, 4508, 4844, 4913, 4917 16
Data to Evaluate
3158539628375348
3337465828248404
3112804683572030
3112804683572033
5435528978467581
6706465468107999
6304362971054667
6706169762827894
6706169762827892
4844104341377697
4913405490886727
4844885754351829
4844885754351822
6371473570875275
6381475006869978
6389057917814806
347100734345549
347100734345543
6011162533805000
6011621663574413
6011824617460743
6011824617460745
6389057917814802
4539318768050385
36880982786892
36845793345501
36661154562232
36661154562234
5893329089846994
6761680165952016
6763100400984029
6763100400984022
5127043299122389
5330838017737340
5429168755154025
5429168755154023
375354034606481
379570632133224
4485521241443135
4532916206508075
4532916206508076
5590976687287124
5540641137519895
5540641137519892
30522070708059
30066552673241
30365487186802
30365487186801
Simplified Issuer Codes for Final Project:
VISA: 45 44
MasterCard: 51 53
American Express (AMEX):37 34
Discover: 60
JCB: 31 33
Diners Club - North America: 54 55
Diners Club - Carte Blanche:30
Diners Club - International: 36
Maestro: 58
LASER: 67
Visa Electron:48 49
InstaPayment: 63
HERE IS THE CODE BUT WHEN I RUN USING BLUE J IS NOT WORKING
import java.io.PrintWriter; import java.util.Scanner; import java.io.File; public class CardValidation { public static void main(String args[]) { String Valid_numbers[] = new String[50]; String Invalid_numbers[] = new String[50]; String Cards[] = new String[50]; int V_count = 0, Inv_count = 0, count = 0; try { Scanner inp = new Scanner(new File("DataEval.txt")); while (inp.hasNextLine()) { Cards[count] = inp.nextLine(); count++; } inp.close(); } catch (Exception e) { e.printStackTrace(); } System.out.println(" Card number Card Issuer"); for (int i = 0; i < count; i++) { if (Cards[i].length() >= 13 && Cards[i].length() <= 19) { System.out.printf("%20s %s ", Cards[i], Issuer(Cards[i])); if (isValidCard(Cards[i])) { Valid_numbers[V_count] = Cards[i]; V_count++; } else { Invalid_numbers[Inv_count] = Cards[i]; Inv_count++; } } else { System.out.println("Length of the card number is not valid."); } } try { PrintWriter vPrint = new PrintWriter(new File("valid.txt")); for (int i = 0; i < V_count; i++) vPrint.println(Valid_numbers[i]); vPrint.close(); PrintWriter invPrint = new PrintWriter(new File( "invalid.txt")); for (int i = 0; i < Inv_count; i++) invPrint.println(Invalid_numbers[i]); invPrint.close(); } catch (Exception e) { e.printStackTrace(); } } public static boolean isValidCard(String cards) { int val[] = new int[cards.length()]; for (int i = 0; i < cards.length(); i++) { val[i] = Integer.parseInt(cards.charAt(i) + ""); } int x = LastDigitDrop(val); int reverse[] = DigitsReverse(val); int multiplyOdd[] = OddDigitsdouble(reverse); int addDigits[] = DigitsAdd(multiplyOdd); int sum = 0; for (int i = 0; i < addDigits.length; i++) sum += addDigits[i]; boolean validate = valid(sum, x); if (validate) return true; else return false; } public static int LastDigitDrop(int[] cardNumber) { return cardNumber[cardNumber.length - 1]; } public static int[] DigitsReverse(int[] cardNumber) { int revrs[] = new int[cardNumber.length]; for (int i = 0; i < cardNumber.length; i++) { revrs[i] = cardNumber[cardNumber.length - 1 - i]; } return revrs; } public static int[] OddDigitsdouble(int[] revrs) { int Odds[] = new int[revrs.length]; for (int i = 0; i < revrs.length; i++) { if (i % 2 == 0) { Odds[i] = revrs[i] * 2; } else { Odds[i] = revrs[i]; } } return Odds; } public static int[] DigitsAdd(int[] mulOdd) { int sumDig[] = new int[mulOdd.length]; int first, second; for (int i = 0; i < mulOdd.length; i++) { if (mulOdd[i] >= 10) { first = mulOdd[i] / 10; second = mulOdd[i] % 10; sumDig[i] = first + second; } else if (mulOdd[i] < 10) { sumDig[i] = mulOdd[i]; } } return sumDig; } public static boolean valid(int s, int x) { if ((s + x) % 10 == 0) return true; else return false; } public static String Issuer(String cardNumber) { String start2Chars = cardNumber.substring(0, 2); int val = Integer.parseInt(start2Chars); if (val == 34 || val == 37) return "American Express"; else if (val == 45 || val == 44) return "VISA"; else if (val == 51 || val == 53) return "MasterCard"; else if (val == 60) return "Discover"; else if (val == 31 || val == 33) return "JCB"; else if (val == 54 || val == 55) return "Diners Club - North America"; else if (val == 30) return "Diners Club - Carte Blanche"; else if (val == 36) return "Diners Club - International"; else if (val == 58) return "Maestro"; else if (val == 67) return "LASER"; else if (val == 48 || val == 49) return "Visa Electron"; else if (val == 63) return "InstaPayment"; else return "Not issued by any"; } }
NEED HELP TO FIX THIS CODE TO RUN USING BLUE J
Explanation / Answer
Hi,
Please see below the updated working class.
CardValidation.java
import java.io.PrintWriter;
import java.util.Scanner;
import java.io.File;
public class CardValidation {
public static void main(String args[]) {
String Valid_numbers[] = new String[50];
String Invalid_numbers[] = new String[50];
String Cards[] = new String[50];
int V_count = 0, Inv_count = 0, count = 0;
try {
Scanner inp = new Scanner(new File("DataEval.txt"));
while (inp.hasNextLine()) {
Cards[count] = inp.nextLine();
count++;
}
inp.close();
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(" Card number Card Issuer");
for (int i = 0; i < count; i++) {
if (Cards[i].length() >= 13 && Cards[i].length() <= 19) {
System.out.printf("%20s %s ", Cards[i], Issuer(Cards[i]));
if (isValidCard(Cards[i])) {
Valid_numbers[V_count] = Cards[i];
V_count++;
} else {
Invalid_numbers[Inv_count] = Cards[i];
Inv_count++;
}
} else {
System.out.println("Length of the card number is not valid.");
}
}
try {
PrintWriter vPrint = new PrintWriter(new File("valid_cards.txt"));
for (int i = 0; i < V_count; i++)
vPrint.println(Valid_numbers[i]);
vPrint.flush();
vPrint.close();
PrintWriter invPrint = new PrintWriter(new File("invalid_numbers.txt"));
for (int i = 0; i < Inv_count; i++)
invPrint.println(Invalid_numbers[i]);
invPrint.flush();
invPrint.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean isValidCard(String cards) {
int val[] = new int[cards.length()];
for (int i = 0; i < cards.length(); i++) {
val[i] = Integer.parseInt(cards.charAt(i) + "");
}
int x = LastDigitDrop(val);
int reverse[] = DigitsReverse(val);
int multiplyOdd[] = OddDigitsdouble(reverse);
int addDigits[] = DigitsAdd(multiplyOdd);
int sum = 0;
for (int i = 0; i < addDigits.length; i++)
sum += addDigits[i];
boolean validate = valid(sum, x);
if (validate)
return true;
else
return false;
}
public static int LastDigitDrop(int[] cardNumber) {
return cardNumber[cardNumber.length - 1];
}
public static int[] DigitsReverse(int[] cardNumber) {
int revrs[] = new int[cardNumber.length];
for (int i = 0; i < cardNumber.length; i++) {
revrs[i] = cardNumber[cardNumber.length - 1 - i];
}
return revrs;
}
public static int[] OddDigitsdouble(int[] revrs) {
int Odds[] = new int[revrs.length];
for (int i = 0; i < revrs.length; i++) {
if (i % 2 == 0) {
Odds[i] = revrs[i] * 2;
} else {
Odds[i] = revrs[i];
}
}
return Odds;
}
public static int[] DigitsAdd(int[] mulOdd) {
int sumDig[] = new int[mulOdd.length];
int first, second;
for (int i = 0; i < mulOdd.length; i++) {
if (mulOdd[i] >= 10) {
first = mulOdd[i] / 10;
second = mulOdd[i] % 10;
sumDig[i] = first + second;
} else if (mulOdd[i] < 10) {
sumDig[i] = mulOdd[i];
}
}
return sumDig;
}
public static boolean valid(int s, int x) {
if ((s + x) % 10 == 0)
return true;
else
return false;
}
public static String Issuer(String cardNumber) {
String start2Chars = cardNumber.substring(0, 2);
int val = Integer.parseInt(start2Chars);
if (val == 34 || val == 37)
return "American Express";
else if (val == 45 || val == 44)
return "VISA";
else if (val == 51 || val == 53)
return "MasterCard";
else if (val == 60)
return "Discover";
else if (val == 31 || val == 33)
return "JCB";
else if (val == 54 || val == 55)
return "Diners Club - North America";
else if (val == 30)
return "Diners Club - Carte Blanche";
else if (val == 36)
return "Diners Club - International";
else if (val == 58)
return "Maestro";
else if (val == 67)
return "LASER";
else if (val == 48 || val == 49)
return "Visa Electron";
else if (val == 63)
return "InstaPayment";
else
return "Not issued by any";
}
}
valid_cards.txt
6381475006869978
36661154562234
6763100400984022
379570632133224
invalid_numbers.txt
3158539628375348
3337465828248404
3112804683572030
3112804683572033
5435528978467581
6706465468107999
6304362971054667
6706169762827894
6706169762827892
4844104341377697
4913405490886727
4844885754351829
4844885754351822
6371473570875275
6389057917814806
347100734345549
347100734345543
6011162533805000
6011621663574413
6011824617460743
6011824617460745
6389057917814802
4539318768050385
36880982786892
36845793345501
36661154562232
5893329089846994
6761680165952016
6763100400984029
5127043299122389
5330838017737340
5429168755154025
5429168755154023
375354034606481
4485521241443135
4532916206508075
4532916206508076
5590976687287124
5540641137519895
5540641137519892
30522070708059
30066552673241
30365487186802
30365487186801
Sample output
Card number Card Issuer
3158539628375348 JCB
3337465828248404 JCB
3112804683572030 JCB
3112804683572033 JCB
5435528978467581 Diners Club - North America
6706465468107999 LASER
6304362971054667 InstaPayment
6706169762827894 LASER
6706169762827892 LASER
4844104341377697 Visa Electron
4913405490886727 Visa Electron
4844885754351829 Visa Electron
4844885754351822 Visa Electron
6371473570875275 InstaPayment
6381475006869978 InstaPayment
6389057917814806 InstaPayment
347100734345549 American Express
347100734345543 American Express
6011162533805000 Discover
6011621663574413 Discover
6011824617460743 Discover
6011824617460745 Discover
6389057917814802 InstaPayment
4539318768050385 VISA
36880982786892 Diners Club - International
36845793345501 Diners Club - International
36661154562232 Diners Club - International
36661154562234 Diners Club - International
5893329089846994 Maestro
6761680165952016 LASER
6763100400984029 LASER
6763100400984022 LASER
5127043299122389 MasterCard
5330838017737340 MasterCard
5429168755154025 Diners Club - North America
5429168755154023 Diners Club - North America
375354034606481 American Express
379570632133224 American Express
4485521241443135 VISA
4532916206508075 VISA
4532916206508076 VISA
5590976687287124 Diners Club - North America
5540641137519895 Diners Club - North America
5540641137519892 Diners Club - North America
30522070708059 Diners Club - Carte Blanche
30066552673241 Diners Club - Carte Blanche
30365487186802 Diners Club - Carte Blanche
30365487186801 Diners Club - Carte Blanche
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