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Java > Open Source Codes > java > util > zip > Checksum


1 /*
2  * @(#)Checksum.java 1.16 03/12/19
3  *
4  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6  */
7
8 package java.util.zip;
9
10 /**
11  * An interface representing a data checksum.
12  *
13  * @version 1.16, 12/19/03
14  * @author David Connelly
15  */
16 public
17 interface Checksum {
18     /**
19      * Updates the current checksum with the specified byte.
20      *
21      * @param b the byte to update the checksum with
22      */
23     public void update(int b);
24
25     /**
26      * Updates the current checksum with the specified array of bytes.
27      * @param b the byte array to update the checksum with
28      * @param off the start offset of the data
29      * @param len the number of bytes to use for the update
30      */
31     public void update(byte[] b, int off, int len);
32
33     /**
34      * Returns the current checksum value.
35      * @return the current checksum value
36      */
37     public long getValue();
38
39     /**
40      * Resets the checksum to its initial value.
41      */
42     public void reset();
43 }
44
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