Java Integer Create toInt(byte[] bytes)

Description

Converts a byte array to an int value

License

GNU General Public License

Parameter

Parameter	Description
bytes	byte array

Exception

Parameter	Description
IllegalArgumentException	if length is not #SIZEOF_INT

Return

the int value

Declaration

public static int toInt(byte[] bytes) 

Method Source Code

//package com.java2s;
/**/*from   w w w.j  a v a2  s.  c o  m*/
 * Copyright (C) 2016, CERN
 * This software is distributed under the terms of the GNU General Public
 * Licence version 3 (GPL Version 3), copied verbatim in the file "LICENSE".
 * In applying this license, CERN does not waive the privileges and immunities
 * granted to it by virtue of its status as Intergovernmental Organization
 * or submit itself to any jurisdiction.
 */

public class Main {
    public static final int SIZEOF_INT = Integer.SIZE / Byte.SIZE;

    /**
     * Converts a byte array to an int value
     * 
     * @param bytes
     *            byte array
     * @return the int value
     * @throws IllegalArgumentException
     *             if length is not {@link #SIZEOF_INT}
     */
    public static int toInt(byte[] bytes) {
        if (SIZEOF_INT > bytes.length)
            throw new IllegalArgumentException("length is not SIZEOF_INT");

        int n = 0;
        for (int i = 0; i < +bytes.length; i++) {
            n <<= 8;
            n ^= bytes[i] & 0xFF;
        }
        return n;
    }
}

Related

1. toInt(byte[] bytes)
2. toInt(byte[] bytes)
3. toInt(byte[] bytes)
4. toInt(byte[] bytes)
5. toInt(byte[] bytes)
6. toInt(byte[] bytes)
7. toInt(byte[] bytes)
8. toInt(byte[] bytes)
9. toInt(byte[] bytes, boolean isBigEndian)