Adler32 (Java 2 Platform SE 5.0) (original) (raw)

java.util.zip

Class Adler32

java.lang.Object extended by java.util.zip.Adler32

All Implemented Interfaces:

public class Adler32

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

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](../../../java/util/zip/Adler32.html#update%28byte[], int, int%29)(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](../../../java/lang/Object.html#wait%28long, int%29)

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](../../../java/util/zip/Checksum.html#update%28int%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")

Parameters:

b - an array of bytes

update

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

Updates checksum with specified array of bytes.

Specified by:

[update](../../../java/util/zip/Checksum.html#update%28byte[], int, int%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")

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

update

public void update(byte[] b)

Updates checksum with specified array of bytes.

reset

public void reset()

Resets checksum to initial value.

Specified by:

[reset](../../../java/util/zip/Checksum.html#reset%28%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")

getValue

public long getValue()

Returns checksum value.

Specified by:

[getValue](../../../java/util/zip/Checksum.html#getValue%28%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")

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.