1. /*

  2.  * @(#)Checksum.java	1.11 01/11/29

  3.  *

  4.  * Copyright 2002 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 	1.11, 11/29/01

  14.  * @author 	David Connelly

  15.  */

  16. public

  17. interface Checksum {

  18.     /**

  19.      * Updates the current checksum with the specified byte.

  20.      */

  21.     public void update(int b);

  22. 

  23.     /**

  24.      * Updates the current checksum with the specified array of bytes.

  25.      */

  26.     public void update(byte[] b, int off, int len);

  27. 

  28.     /**

  29.      * Returns the current checksum value.

  30.      */

  31.     public long getValue();

  32. 

  33.     /**

  34.      * Resets the checksum to its initial value.

  35.      */

  36.     public void reset();

  37. }