Java Byte Array to Unsigned Int bytesToUIntLong(byte[] bytes, int index)

Description

Combines four bytes (most significant bit first) into a 32 bit unsigned integer.

License

Open Source License

Parameter

Parameter	Description
bytes	a parameter
index	of most significant byte

Return

long with the 32 bit unsigned integer

Declaration

public static long bytesToUIntLong(byte[] bytes, int index) 

Method Source Code

//package com.java2s;
/**/*  w ww. ja v  a2  s  . c  o  m*/
 * This program 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 3 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 Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * @author Arne Kepp, The Open Planning Project, Copyright 2008
 */

public class Main {
    /**
     * Combines four bytes (most significant bit first) into a 32 bit unsigned integer.
     *
     * @param bytes
     * @param index of most significant byte
     * @return long with the 32 bit unsigned integer
     */
    public static long bytesToUIntLong(byte[] bytes, int index) {
        long accum = 0;
        int i = 3;
        for (int shiftBy = 0; shiftBy < 32; shiftBy += 8) {
            accum |= ((long) (bytes[index + i] & 0xff)) << shiftBy;
            i--;
        }
        return accum;
    }
}

Related

1. bytesToUint(byte first, byte second, byte third, byte fourth)
2. bytesToUInt(final byte[] bytes, final int position, final int length, final int bitShiftStart, final int bitShitIncrement)
3. bytesToUIntLE(byte[] data)
4. bytesToUnsignedInt(byte ib1, byte ib2)
5. bytesToUnsignedInts(byte[] bytes)
6. bytesToUshort(byte b1, byte b2)
7. bytesToUshort(byte first, byte second)