All Implemented Interfaces:

Checksum

public class CRC32
extends Object
implements Checksum 

See Also:

Checksum

• Constructor Summary

  Constructors

  Constructor	Description
  CRC32 ()	Creates a new CRC32 object.

• Method Summary

  All Methods

  Modifier and Type	Method	Description
  long	getValue ()	Returns CRC-32 value.
  void	reset ()	Resets CRC-32 to initial value.
  void	update (byte[] b)	Updates the CRC-32 checksum with the specified array of bytes.
  void	update (byte[] b, int off, int len)	Updates the CRC-32 checksum with the specified array of bytes.
  void	update (ByteBuffer buffer)	Updates the checksum with the bytes from the specified buffer.
  void	update (int b)	Updates the CRC-32 checksum with the specified byte (the low eight bits of the argument b).

  • 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 the CRC-32 checksum with the specified byte (the low eight bits of the argument b).

    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 the CRC-32 checksum with the 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

    Throws:

    ArrayIndexOutOfBoundsException - if off is negative, or len is negative, or off+len is greater than the length of the array b

  • update

    public void update(byte[] b)

    Updates the CRC-32 checksum with the specified array of bytes.

    Parameters:

    b - the array of bytes to update the checksum with

  • update

    public void update(ByteBuffer buffer)

    Updates the checksum with the bytes from the specified buffer. The checksum is updated using buffer.remaining() bytes starting at buffer.position() Upon return, the buffer's position will be updated to its limit; its limit will not have been changed.

    Parameters:

    buffer - the ByteBuffer to update the checksum with

    Since:

    1.8

  • 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