Java Byte Array to Long bytesToLong(byte[] b)

Description

bytes To Long

License

Open Source License

Declaration

public static long bytesToLong(byte[] b) 

Method Source Code

//package com.java2s;
/*/*from   w w  w.ja  va 2s  . c o  m*/
 * Werkzeug
 *
 * Copyright (C) 2012 Patrick Kochlik + Dennis Paul
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * {@link http://www.gnu.org/licenses/lgpl.html}
 *
 */

public class Main {
    public static long bytesToLong(byte[] b) {
        if (b.length < 8) {
            throw new IllegalArgumentException("Byte array should contain at least 8 bytes");
        }

        long l = 0;
        for (int i = 0; i < 8; i++) {
            l += (getUnsignedByte(b[i]) << (8 * i));
        }

        return l;
    }

    public static long getUnsignedByte(byte b) {
        return (b & 128) + (b & 127);
    }
}

Related

1. bytesToLong(byte[] a, int ao)
2. bytesToLong(byte[] arr, int offset)
3. bytesToLong(byte[] array, int offset)
4. bytesToLong(byte[] b)
5. bytesToLong(byte[] b)
6. bytesToLong(byte[] bs)
7. bytesToLong(byte[] buf, int offset, int length, boolean asc)
8. bytesToLong(byte[] bytes)
9. bytesToLong(byte[] bytes)