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26 package java.util.zip;
29 * An interface representing a data checksum.
31 * @author David Connelly
36 * Updates the current checksum with the specified byte.
38 * @param b the byte to update the checksum with
40 public void update(int b);
43 * Updates the current checksum with the specified array of bytes.
44 * @param b the byte array to update the checksum with
45 * @param off the start offset of the data
46 * @param len the number of bytes to use for the update
48 public void update(byte[] b, int off, int len);
51 * Returns the current checksum value.
52 * @return the current checksum value
54 public long getValue();
57 * Resets the checksum to its initial value.