Combines four bytes (most significant bit first) into a 32 bit unsigned integer. - Java java.lang

Java examples for java.lang:int Format

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Description

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

Demo Code

/*// w  ww  .j av  a2 s.c  o m
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2014, Telestax Inc and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */
//package com.java2s;

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
     */
    private 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;
    }
}

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