public final class VerhoeffCheckDigit extends Object implements CheckDigit, Serializable
Check digit calculation for numeric codes using a Dihedral Group of order 10.
See Wikipedia - Verhoeff algorithm for more details.
| Modifier and Type | Field and Description |
|---|---|
static CheckDigit |
VERHOEFF_CHECK_DIGIT
Singleton Verhoeff Check Digit instance
|
| Constructor and Description |
|---|
VerhoeffCheckDigit() |
| Modifier and Type | Method and Description |
|---|---|
String |
calculate(String code)
Calculate a Verhoeff Check Digit for a code.
|
boolean |
isValid(String code)
Validate the Verhoeff Check Digit for a code.
|
public static final CheckDigit VERHOEFF_CHECK_DIGIT
public boolean isValid(String code)
isValid in interface CheckDigitcode - The code to validatetrue if the check digit is valid,
otherwise falsepublic String calculate(String code) throws CheckDigitException
calculate in interface CheckDigitcode - The code to calculate the Check Digit forCheckDigitException - if an error occurs calculating
the check digit for the specified codeCopyright © 2002–2020 The Apache Software Foundation. All rights reserved.