public interface Checksum
Modifier and Type | Method | Description |
---|---|---|
long |
getValue() |
Returns the current checksum value. |
void |
reset() |
Resets the checksum to its initial value. |
default void |
update |
Updates the current checksum with the specified array of bytes. |
void |
update |
Updates the current checksum with the specified array of bytes. |
void |
update |
Updates the current checksum with the specified byte. |
default void |
update |
Updates the current checksum with the bytes from the specified buffer. |
void update(int b)
b
- the byte to update the checksum withdefault void update(byte[] b)
update(b, 0, b.length)
.b
- the array of bytes to update the checksum withNullPointerException
- if b
is null
void update(byte[] b, int off, int len)
b
- the byte array to update the checksum withoff
- the start offset of the datalen
- the number of bytes to use for the updatedefault void update(ByteBuffer buffer)
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);
}
buffer
- the ByteBuffer to update the checksum withNullPointerException
- if buffer
is null
long getValue()
void reset()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/zip/Checksum.html