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CRC32 (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 CRC32

java.lang.Object
  |
  +--java.util.zip.CRC32

All Implemented Interfaces:

Checksum

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public class CRC32

extends Object

implements Checksum

A class that can be used to compute the CRC-32 of a data stream.

See Also:

Checksum

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Constructor Summary

CRC32()           Creates a new CRC32 object.

 

Method Summary
long	getValue()           Returns CRC-32 value.
void	reset()           Resets CRC-32 to initial value.
void	update(byte[] b)           Updates checksum with specified array of bytes.
void	update(byte[] b, int off, int len)           Updates CRC-32 with specified array of bytes.
void	update(int b)           Updates CRC-32 with specified byte.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

CRC32

public CRC32()

Creates a new CRC32 object.

Method Detail

update

public void update(int b)

Updates CRC-32 with specified byte.

Specified by:

update in interface Checksum

Parameters:

b - the byte to update the checksum with

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update

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

Updates CRC-32 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.

Parameters:

b - the array of bytes to update the checksum with

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reset

public void reset()

Resets CRC-32 to initial value.

Specified by:

reset in interface Checksum

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getValue

public long getValue()

Returns CRC-32 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.