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Adler32 (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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java.util.zip
Class Adler32

java.lang.Object
  |
  +--java.util.zip.Adler32

All Implemented Interfaces:

Checksum

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public class Adler32

extends Object

implements Checksum

A class that can be used to compute the Adler-32 checksum of a data stream. An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed much faster.

See Also:

Checksum

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Constructor Summary

Adler32()           Creates a new Adler32 object.

 

Method Summary
long	getValue()           Returns checksum value.
void	reset()           Resets checksum to initial value.
void	update(byte[] b)           Updates checksum with specified array of bytes.
void	update(byte[] b, int off, int len)           Updates checksum with specified array of bytes.
void	update(int b)           Updates checksum with specified byte.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

Adler32

public Adler32()

Creates a new Adler32 object.

Method Detail

update

public void update(int b)

Updates checksum with specified byte.

Specified by:

update in interface Checksum

Parameters:

b - an array of bytes

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update

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

Updates checksum with specified array of bytes.

Specified by:

update in interface Checksum

Parameters:

b - the byte array to update the checksum with

off - the start offset of the data

len - the number of bytes to use for the update

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update

public void update(byte[] b)

Updates checksum with specified array of bytes.

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reset

public void reset()

Resets checksum to initial value.

Specified by:

reset in interface Checksum

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getValue

public long getValue()

Returns checksum value.

Specified by:

getValue in interface Checksum

Returns:

the current checksum value

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.