Java Utililty Methods Byte Array Create

List of utility methods to do Byte Array Create

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Description

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

Method

byte[]toByteArray(int value)
Converts an int into a 4-byte array in Big Endian order (most-significant byte in slot 0) 
byte[] output = new byte[4];
toByteArray(value, output);
return output;
byte[]toByteArray(int value)
to Byte Array 
return new byte[] { (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value };
voidtoByteArray(int value, int numBytes, byte[] dest, int off)
Converts a signed int into an array of bytes and writes it to a byte array t the given offset. 
for (int i = 0; i < numBytes; i++) {
    dest[i + off] = (byte) (value >>> ((i + 2) * 8) & 0xff);
byte[]toByteArray(int[] array)
to Byte Array 
byte[] data = new byte[array.length];
for (int i = 0; i < array.length; i++) {
    data[i] = (byte) array[i];
return data;
byte[]toByteArray(int[] data)
Convenience method to transform an int[] array to a byte array for serialization. 
byte[] tmp, result = new byte[data.length * 4];
for (int i = 0; i < data.length; i++) {
    tmp = toBytes(data[i]);
    System.arraycopy(tmp, 0, result, i * 4, 4);
return result;
byte[]toByteArray(int[] data, boolean includeLength)
to Byte Array 
int n = data.length << 2;
if (includeLength) {
    int m = data[data.length - 1];
    n -= 4;
    if ((m < n - 3) || (m > n)) {
        return null;
    n = m;
...
byte[]toByteArray(long hi, long lo)
converts two longs to a byte[] 
byte[] bytes = new byte[16];
int count = 0;
int v;
while (count < 16) {
    if (count == 0) {
        v = (int) (hi >>> 32);
    } else if (count == 4) {
        v = (int) hi;
...
byte[]toByteArray(Long mac)
to Byte Array 
byte macArr[] = new byte[] { (byte) ((mac >> 40) & 0xff), (byte) ((mac >> 32) & 0xff),
        (byte) ((mac >> 24) & 0xff), (byte) ((mac >> 16) & 0xff), (byte) ((mac >> 8) & 0xff),
        (byte) ((mac >> 0) & 0xff), };
return macArr;
byte[]toByteArray(long value)
to Byte Array 
byte[] b = new byte[Long.BYTES];
for (int i = 0; i < b.length; ++i) {
    b[i] = (byte) (value >> (Long.BYTES - i - 1 << 3));
return b;
byte[]toByteArray(long value)
to Byte Array 
byte[] b = new byte[8];
for (int i = 0; i < 8; i++) {
    int offset = (8 - 1 - i) * 8;
    b[i] = (byte) (value >>> offset & 0xFF);
return b;