Converts a given byte array to a long value - Java java.lang

Java examples for java.lang:byte Array Convert

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Description

Converts a given byte array to a long value

Demo Code

/**//  w ww  . j  a v  a2 s . c o  m
 * Copyright (c) 2007-2015, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
 *      disclaimer.
 *    - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *      following disclaimer in the documentation and/or other materials provided with the distribution.
 *    - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
 *      products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] b = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(byteToLong(b));
    }

    /**
     * Converts a given byte array to a long value
     *
     * @param b
     *            Byte array to convert
     * @return Long value
     */
    public static long byteToLong(final byte[] b) {
        long result = 0;
        for (int j = 0; j < 8; j++) {
            result <<= 8;
            result |= (b[j] & 0xFF);
        }

        return result;
    }
}

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