Java™ Platform
Standard Ed. 6

java.util.zip
Class Adler32

java.lang.Object
  extended by java.util.zip.Adler32
All Implemented Interfaces:
Checksum

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

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

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

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 in interface Checksum

getValue

public long getValue()
Returns checksum value.

Specified by:
getValue in interface Checksum
Returns:
the current checksum value

Java™ Platform
Standard Ed. 6

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

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