Package java.util.zip

Interface Checksum

All Known Implementing Classes:

Adler32, CRC32

public interface Checksum

The interface common to checksum classes such as Adler32 and CRC32.

Method Summary

Modifier and Type	Method	Description
long	getValue()	Returns the current calculated checksum value.
void	reset()	Resets the checksum value applied before beginning calculations on a new stream of data.
void	update(byte[] buf, int off, int nbytes)	Updates the checksum with the given bytes.
void	update(int val)	Updates the checksum value with the given byte.

Method Details

getValue

long getValue()

Returns the current calculated checksum value.

Returns:

the checksum.

reset

void reset()

Resets the checksum value applied before beginning calculations on a new stream of data.

update

void update(byte[] buf,
int off,
int nbytes)

Updates the checksum with the given bytes.

Parameters:

buf - the byte array from which to read the bytes.

off - the initial position in buf to read the bytes from.

nbytes - the number of bytes to read from buf.

update

void update(int val)

Updates the checksum value with the given byte.

Parameters:

val - the byte to update the checksum with.