Java Utililty Methods Integer to Byte Array

List of utility methods to do Integer to Byte Array

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Description

The list of methods to do Integer to Byte Array are organized into topic(s).

Method

byte[]convertIntegersToBytes(int[] integers)
This function converts an int integer array to a byte array. 
if (integers != null) {
    byte[] outputBytes = new byte[integers.length * 4];
    for (int i = 0, k = 0; i < integers.length; i++) {
        int integerTemp = integers[i];
        for (int j = 0; j < 4; j++, k++) {
            outputBytes[k] = (byte) ((integerTemp >> (8 * j)) & 0xFF);
    return outputBytes;
} else {
    return null;
byte[]convertIntegerToByteArray(int value, int bytes, boolean revers)
convert Integer To Byte Array 
if (bytes == 1 && !revers) {
    return new byte[] { (byte) value };
} else if (bytes == 1 && revers) {
    return new byte[] { (byte) (value >>> 24) };
} else if (bytes == 2 && !revers) {
    return new byte[] { (byte) (value >>> 8), (byte) value };
} else if (bytes == 2 && revers) {
    return new byte[] { (byte) (value >>> 24), (byte) (value >>> 16) };
...
byte[]convertIntToByteArray(int value)
convert Int To Byte Array 
int originValue = value;
int size = 0;
if (value < 0) {
    value = -value;
while (value > sizeTable[size])
    size++;
size++;
...
byte[]convertIntToByteArray(int value, int numberOfBytes)
convert Int To Byte Array 
byte b[] = new byte[numberOfBytes];
int i, shift;
for (i = 0, shift = (b.length - 1) * 8; i < b.length; i++, shift -= 8) {
    b[i] = (byte) (0xFF & (value >> shift));
return b;
byte[]convertIntToByteArray(int[] rgb)
Converts the given int[] array into a byte[] array 
byte[] data = new byte[rgb.length * 4];
int j = 0;
for (int i = 0; i < rgb.length; i++) {
    int v = rgb[i];
    data[j + 0] = (byte) ((v >>> 24) & 0xFF);
    data[j + 1] = (byte) ((v >>> 16) & 0xFF);
    data[j + 2] = (byte) ((v >>> 8) & 0xFF);
    data[j + 3] = (byte) ((v >>> 0) & 0xFF);
...
byte[]convertIntToBytes(int i)
convert Int To Bytes 
byte[] b = new byte[4];
b[0] = (byte) (0xff & i);
b[1] = (byte) ((0xff00 & i) >> 8);
b[2] = (byte) ((0xff0000 & i) >> 16);
b[3] = (byte) ((0xff000000 & i) >> 24);
return b;
byte[]fromIntToByte(int integer)
from Int To Byte 
String s = String.valueOf(integer);
byte[] b = new byte[s.length()];
for (int i = 0; i < s.length(); i++) {
    b[i] = (byte) s.charAt(i);
return b;
byte[]fromIntToByteArray(int value)
from Int To Byte Array 
return new byte[] { (byte) (value >>> 24), (byte) (value >>> 16), (byte) (value >>> 8), (byte) value };
voidint2Arr(int var, byte[] arrayBytes, int startIndex)
Write the bytes of "var" into new byte array. 
int length = 4;
if (arrayBytes != null && startIndex + length <= arrayBytes.length) {
    for (int j = startIndex; j < startIndex + length; j++) {
        arrayBytes[j] = (byte) var; 
        var >>= 8;
voidint2ByteLE(byte[] bytes, int value, int offset)
int Byte LE 
checkLength(bytes, 4, offset);
bytes[offset + 0] = (byte) ((value & 0xff));
bytes[offset + 1] = (byte) ((value >> 8 * 1) & 0xff);
bytes[offset + 2] = (byte) ((value >> 8 * 2) & 0xff);
bytes[offset + 3] = (byte) ((value >> 8 * 3));