Java Integer Create toIntArray(byte[] data)

Description

to Int Array

License

Open Source License

Declaration

public static int[] toIntArray(byte[] data) 

Method Source Code

//package com.java2s;
/*/*from w ww  .j a va  2s.co  m*/
 * Copyright (C) 2014 Jesse Caulfield 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public static int[] toIntArray(byte[] data) {
        if ((data == null) || (data.length % 4 != 0)) {
            return null;
        }
        int[] ints = new int[data.length / 4];
        for (int i = 0; i < ints.length; i++) {
            ints[i] = toInt(new byte[] { data[(i * 4)], data[(i * 4) + 1], data[(i * 4) + 2], data[(i * 4) + 3], });
        }
        return ints;
    }

    /**
     * Convert 4 bytes into an int.
     * <p>
     * This converts the 4 bytes into an int.
     *
     * @param byte3 The byte to be left-shifted 24 bits.
     * @param byte2 The byte to be left-shifted 16 bits.
     * @param byte1 The byte to be left-shifted 8 bits.
     * @param byte0 The byte that will not be left-shifted.
     * @return An int representing the bytes.
     */
    public static int toInt(byte byte3, byte byte2, byte byte1, byte byte0) {
        return toInt(toShort(byte3, byte2), toShort(byte1, byte0));
    }

    /**
     * Convert 2 shorts into an int.
     * <p>
     * This converts the 2 shorts into an int.
     *
     * @param mss The Most Significant Short.
     * @param lss The Least Significant Short.
     * @return An int representing the shorts.
     */
    public static int toInt(short mss, short lss) {
        return ((0xffff0000 & mss << 16) | (0x0000ffff & (int) lss));
    }

    public static int toInt(byte[] data) {
        if ((data == null) || (data.length != 4)) {
            return 0x0;
        }
        return ( // NOTE: type cast not necessary for int
        (0xff & data[0]) << 24 | (0xff & data[1]) << 16 | (0xff & data[2]) << 8 | (0xff & data[3]));
    }

    /**
     * Convert 2 bytes into a short.
     * <p>
     * This converts the 2 bytes into a short. The msb will be the high byte (8
     * bits) of the short, and the lsb will be the low byte (8 bits) of the short.
     *
     * @param msb The Most Significant Byte.
     * @param lsb The Least Significant Byte.
     * @return A short representing the bytes.
     */
    public static short toShort(byte msb, byte lsb) {
        return (short) ((0xff00 & (short) (msb << 8)) | (0x00ff & (short) lsb));
    }

    public static short toShort(byte[] data) {
        if ((data == null) || (data.length != 2)) {
            return 0x0;
        }
        return (short) ((0xff & data[0]) << 8 | (0xff & data[1]));
    }
}

Related

1. toIntArray(boolean[] array)
2. toIntArray(boolean[] selectedValues)
3. toIntArray(byte[] byteArray)
4. toIntArray(byte[] bytes)
5. toIntArray(byte[] data)
6. toIntArray(byte[] data, boolean includeLength)
7. toIntArray(byte[] data, int offset)
8. toIntArray(byte[] input)
9. toIntArray(double[] a)