Interface Checksum

void update(int b)

Parameters:

b - the byte to update the checksum with

default void update(byte[] b)

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

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

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

default void update(ByteBuffer buffer)

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

long getValue()

Returns:

the current checksum value

void reset()