Method Summary

Method Detail

• update

  void update​(int b)

  Updates the current checksum with the specified byte.

  Parameters:

  b - the byte to update the checksum with

• update

  default void update​(byte[] b)

  Updates the current checksum with the specified array of bytes.

  Implementation Requirements:

  This default implementation is equal to calling update(b, 0, b.length).

  Parameters:

  b - the array of bytes to update the checksum with

  Throws:

  NullPointerException - if b is null

  Since:

  9

• update

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

  Updates the current checksum with the specified array of bytes.

  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

  default void update​(ByteBuffer buffer)

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

  API Note:

  For best performance with DirectByteBuffer and other ByteBuffer implementations without a backing array implementers of this interface should override this method.

  Implementation Requirements:

  The default implementation has the following behavior.
  For ByteBuffers backed by an accessible byte array.

  
   update(buffer.array(),
   buffer.position() + buffer.arrayOffset(),
   buffer.remaining());
   

  For ByteBuffers not backed by an accessible byte array.

  
   byte[] b = new byte[Math.min(buffer.remaining(), 4096)];
   while (buffer.hasRemaining()) {
   int length = Math.min(buffer.remaining(), b.length);
   buffer.get(b, 0, length);
   update(b, 0, length);
   }
   

  Parameters:

  buffer - the ByteBuffer to update the checksum with

  Throws:

  NullPointerException - if buffer is null

  Since:

  9

• getValue

  long getValue​()

  Returns the current checksum value.

  Returns:

  the current checksum value

• reset

  void reset​()

  Resets the checksum to its initial value.