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## java.util.zip
Class Adler32

    java.lang.Object
      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

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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.

Copyright 2009 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.