A check digit algorithm works by adding an extra digit, called the check digit, which is calculated from the other digits in the number using a mathematical formula. These algorithms help catch common mistakes like mistyped, missing, or transposed digits.

Algorithms:

• Damm algorithm
• Luhn algorithm
• Verhoeff algorithm

We need to create a Java file to contain the following code:

package demo; import io.github.aochoae.checkdigit.LuhnCheckDigit; public class App { public static void main(String args[]) { LuhnCheckDigit checkDigit = new LuhnCheckDigit(); System.out.println(checkDigit.generate("4872148")); } } 

The output must be

48721484 

Add the following dependency to your project:

dependencies { implementation 'io.github.aochoae:checkdigit-algorithms:2.1.2' } 

<dependencies> <dependency> <groupId>io.github.aochoae</groupId> <artifactId>checkdigit-algorithms</artifactId> <version>2.1.2</version> </dependency> </dependencies> 

Copyright 2020- Luis A. Ochoa

This project is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.