Java tutorial
/*** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Linking this library statically or dynamically with other modules * is making a combined work based on this library. Thus, the terms and * conditions of the GNU General Public License cover the whole * combination. * * As a special exception, the copyright holders of this library give * you permission to link this library with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also meet, * for each linked independent module, the terms and conditions of the * license of that module. An independent module is a module which * is not derived from or based on this library. If you modify this * library, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. * * Project: www.simpledbm.org * Author : Dibyendu Majumdar * Email : d dot majumdar at gmail dot com ignore */ //package org.simpledbm.common.util; import java.util.zip.Adler32; import java.util.zip.Checksum; /** * Utility for calculating checksums for a range of bytes. * * @author Dibyendu Majumdar */ public final class ChecksumCalculator { public static long compute(byte[] data, int start, int length) { Checksum checksum = new Adler32(); checksum.update(data, start, length); return checksum.getValue(); } }