# Class ISBNValidator

java.lang.Object
org.apache.commons.validator.ISBNValidator

@Deprecated public class ISBNValidator extends Object
Deprecated.
Use the new ISBNValidator in the routines package
A class for validating 10 digit ISBN codes. Based on this algorithm

NOTE: This has been replaced by the new `ISBNValidator`.

Since:
  1.2.0

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ISBNValidator()`
  Deprecated.
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `isValid(String isbn)`
  Deprecated.
  If the ISBN is formatted with space or dash separators its format is validated.

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### ISBNValidator

    public ISBNValidator()
    Deprecated.
    Constructs a new instance.

- ## Method Details

  - ### isValid

    public boolean isValid(String isbn)
    Deprecated.
    If the ISBN is formatted with space or dash separators its format is validated. Then the digits in the number are weighted, summed, and divided by 11 according to the ISBN algorithm. If the result is zero, the ISBN is valid. This method accepts formatted or raw ISBN codes.
    Parameters:
      `isbn` - Candidate ISBN number to be validated. `null` is considered invalid.
    Returns:
      true if the string is a valid ISBN code.