checksum.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 53 行

/*
 * @(#)Checksum.java	1.7 96/11/23
 * 
 * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Sun.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
 * THIS SOFTWARE OR ITS DERIVATIVES.
 * 
 * CopyrightVersion 1.1_beta
 * 
 */

package java.util.zip;

/**
 * An interface representing a data checksum.
 *
 * @version 	1.7, 11/23/96
 * @author 	David Connelly
 */
public
interface Checksum {
    /**
     * Updates the current checksum with the specified byte.
     */
    public void update(int b);

    /**
     * Updates the current checksum with the specified array of bytes.
     */
    public void update(byte[] b, int off, int len);

    /**
     * Returns the current checksum value.
     */
    public long getValue();

    /**
     * Resets the checksum to its initial value.
     */
    public void reset();
}