Module seppiko.commons.utils

Package org.seppiko.commons.utils.crypto.crc

Class CRC16MAXIM

java.lang.Object

org.seppiko.commons.utils.crypto.crc.CRC16MAXIM

All Implemented Interfaces:

Checksum

public class CRC16MAXIM
extends Object
implements Checksum

A class that can be used to compute the CRC16 of a data stream with MAXIM.

Author:

Leonard Woo

Constructor Summary

Constructors

Constructor	Description
CRC16MAXIM()	Create CRC-16 instance.

Method Summary

Modifier and Type	Method	Description
long	getValue()	Returns the current checksum value.
void	reset()	Resets the checksum to its initial value.
void	update(byte[] b, int off, int len)	Updates the CRC-16 checksum with the specified array of bytes.
void	update(int b)	Updates the CRC-16 checksum with the specified byte.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.zip.Checksum

update, update

Constructor Details

CRC16MAXIM

public CRC16MAXIM()

Create CRC-16 instance.

Method Details

update

public void update(int b)

Updates the CRC-16 checksum with the specified byte.

Specified by:

update in interface Checksum

Parameters:

b - number.

update

public void update(byte[] b,
 int off,
 int len)
            throws NullPointerException,
ArrayIndexOutOfBoundsException

Updates the CRC-16 checksum with the specified array of bytes.

Specified by:

update in interface Checksum

Parameters:

b - data byte array.

off - data init offset.

len - data length.

Throws:

NullPointerException - data is null.

ArrayIndexOutOfBoundsException - if off is negative, or len is negative, or off+len is negative or greater than the length of the array b.

getValue

public long getValue()

Returns the current checksum value.

Specified by:

getValue in interface Checksum

Returns:

the current checksum value.

reset

public void reset()

Resets the checksum to its initial value.

Specified by:

reset in interface Checksum