Java Integer Create toInt(byte byte3, byte byte2, byte byte1, byte byte0)

Description

Convert 4 bytes into an int.

License

Open Source License

Parameter

Parameter	Description
byte3	The byte to be left-shifted 24 bits.
byte2	The byte to be left-shifted 16 bits.
byte1	The byte to be left-shifted 8 bits.
byte0	The byte that will not be left-shifted.

Return

An int representing the bytes.

Declaration

public static int toInt(byte byte3, byte byte2, byte byte1, byte byte0) 

Method Source Code

//package com.java2s;
/*/*from   ww  w.ja va  2  s  .c  om*/
 * 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 {
    /**
     * 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. toInt(boolean value)
2. toInt(boolean[] bits)
3. toInt(byte b)
4. toInt(byte b1, byte b2, byte b3, byte b4)
5. toInt(byte byte0, byte byte1, byte byte2, byte byte3)
6. toInt(byte in0, byte in1, byte in2, byte in3)
7. toInt(byte mostSignificant, byte leastSignificant)
8. toInt(byte src)
9. toInt(byte value)