Returns an integer packed into a byte array. - Java java.lang

Java examples for java.lang:byte Array to int

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Description

Returns an integer packed into a byte array.

Demo Code

/*//from w w w  . j  a  v  a 2s  . co  m
 * DomUI Java User Interface - shared code
 * Copyright (c) 2010 by Frits Jalvingh, Itris B.V.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * See the "sponsors" file for a list of supporters.
 *
 * The latest version of DomUI and related code, support and documentation
 * can be found at http://www.domui.org/
 * The contact for the project is Frits Jalvingh <jal@etc.to>.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] ba = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int offset = 2;
        System.out.println(getInt(ba, offset));
    }

    /**
     *   Returns an integer packed into a byte array.
     */
    public static int getInt(byte[] ba, int offset) {
        int val = (ba[offset + 3] & 0xff);

        val |= (ba[offset] & 0xff) << 24;
        val |= (ba[offset + 1] & 0xff) << 16;
        val |= (ba[offset + 2] & 0xff) << 8;
        return val;
    }
}

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