JarCasting
Credit Card Number
Credit Card Number is a Java library that can provide details of a bank issued credit card number.
Resources
The goal of this project is to use publicly and freely available documentation to create a reliable Java library to provide information about credit card numbers.
Some resources consulted are:
- Payment card number
- How do you detect Credit card type based on number?
- Finding or Verifying Credit Card Numbers
- Major Industry Identifier
- Luhn Algorithm
- Where can I find test credit card numbers?
Design Principles
- All classes are immutable and thread-safe
- Secure data follows standards in the Java Cryptography Architecture (JCA) Reference Guide
- The standard
toString()function formats data in a readable form - Internationalization of card numbers is supported
- Validity is enforced by JUnit 5 tests
- Java 8 or newer is required
Download and Use in Projects
You can download the jar on the Maven Central Repository. The download page has instructions on how to use the library in your Maven or Gradle build.
Examples
How to Get Bank Card Information
To get bank card information, use code like:
AccountNumber pan = AccountNumbers.accountNumber("5266-0922-0141-6174");
ExpirationDate expiration = new ExpirationDate(2015, 4);
Name name = new Name("Sualeh", "Fatehi");
BankCard card = new BankCard(pan, expiration, name);
System.out.println(card);
and you will get this output:
Bank Card Information:
Raw Account Number: 5266-0922-0141-6174
Primary Account Number: 5266092201416174
Major Industry Identifier: 5 - Banking and financial
Issuer Identification Number: 526609
Card Brand: MasterCard
Last Four Digits: 6174
Passes Luhn Check? Yes
Is Primary Account Number Valid? Yes
Expiration Date: 2015-04
Is Expired? Yes
Name: Sualeh Fatehi
How to Secure the Credit Card Number
If you need the account number information, but want to be secure by not storing the actual primary account number in memory, you can use code like:
AccountNumber pan = AccountNumbers.accountNumber("5266-0922-0141-6174");
pan.dispose();
System.out.println(pan);
and you will get this output:
Account Number:
Major Industry Identifier: 5 - Banking and financial
Issuer Identification Number: null
Card Brand: MasterCard
Passes Luhn Check? Yes
Is Primary Account Number Valid? Yes
Internationalization is Supported
You can use code like:
AccountNumber pan = AccountNumbers.accountNumber("५२६६ ०९२२ ०१४१ ६१७४");
System.out.println(pan);
and you will get this output:
5266092201416174