thinkui.datagen.util
Class Luhn

java.lang.Object
  thinkui.datagen.util.Luhn

public class Luhn

extends java.lang.Object

Implement the Luhn algorithm for checking validitity of values such as: SIN, credit card numbers, etc.

Constructor Summary

Luhn()

Method Summary

static int	calcRemainder(java.lang.String number) Compute the remainder of the remainder of the number according to the Luhn algorithm.
static boolean	isValid(java.lang.String number) Checks whether a string of digits is valid according to the Luhn algorithm.
static void	main(java.lang.String[] args) Main entry point for the test harness.
static java.lang.String	makeValid(java.lang.String number) Checks whether a string of digits is valid according to the Luhn algorithm.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Luhn

public Luhn()

Method Detail

calcRemainder

public static final int calcRemainder(java.lang.String number)

Compute the remainder of the remainder of the number according to the Luhn algorithm. If an empty string is specified, then 0 will be returned.

Parameters:

number - the String of digits to compute the Luhn remainder.

Returns:

the remainder as computed by the Luhn algorithm

isValid

public static final boolean isValid(java.lang.String number)

Checks whether a string of digits is valid according to the Luhn algorithm.

Parameters:

number - the String of digits to validate according the Luhn remainder.

main

public static final void main(java.lang.String[] args)

Main entry point for the test harness.

Parameters:

args - the command line arguments.

makeValid

public static final java.lang.String makeValid(java.lang.String number)

Checks whether a string of digits is valid according to the Luhn algorithm. If the input is not valid, the last digit is modified to correct the input.

Parameters:

number - the String of digits to validate according the Luhn remainder.

Returns:

the corrected digits that is valid according the Luhn remainder.