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## java.util.zip
Class CRC32

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

All Implemented Interfaces:
  Checksum

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`

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

### 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

### update

    public void update(byte[] b)

  Updates checksum with specified array of bytes.

  Parameters:
    `b` - the array of bytes to update the checksum with

### reset

    public void reset()

  Resets CRC-32 to initial value.

  Specified by:
    `reset` in interface `Checksum`

### 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.