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[]toBytes4(int n)
to Bytes 
byte[] b = new byte[4];
b[0] = (byte) (n);
n >>>= 8;
b[1] = (byte) (n);
n >>>= 8;
b[2] = (byte) (n);
n >>>= 8;
b[3] = (byte) (n);
...
byte[]toBytes4HexString(String str, char... separateds)
to Bytes Hex String 
if (str == null)
    return new byte[0];
char separated = ' ';
if (separateds != null && separateds.length == 1) {
    separated = separateds[0];
    String[] strArr = str.split(separated + "");
    byte[] array = new byte[strArr.length];
    for (int i = 0; i < strArr.length; i++) {
...
byte[]toBytesBE(long v)
to Bytes BE 
return new byte[] { (byte) (v >>> 56), (byte) (v >>> 48), (byte) (v >>> 40), (byte) (v >>> 32),
        (byte) (v >>> 24), (byte) (v >>> 16), (byte) (v >>> 8), (byte) (v >>> 0), };
byte[]toBytesBigEndian(long value, int sizeInByte)
Convert int/long to n-byte array. 
byte[] out = new byte[sizeInByte];
for (int i = (sizeInByte - 1); i >= 0; i--) {
    out[i] = (byte) value;
    value >>>= 8;
return out;
byte[]toBytesBinary(String in)
to Bytes Binary 
byte[] b = new byte[in.length()];
int size = 0;
for (int i = 0; i < in.length(); ++i) {
    char ch = in.charAt(i);
    if (ch == '\\' && in.length() > i + 1 && in.charAt(i + 1) == 'x') {
        char hd1 = in.charAt(i + 2);
        char hd2 = in.charAt(i + 3);
        if (!isHexDigit(hd1) || !isHexDigit(hd2)) {
...
byte[]toBytesDirect(final String singleOctets)
Returns a byte array representing the given string, truncating each character into a byte directly. 
final char[] src = singleOctets.toCharArray();
final byte[] dest = new byte[src.length];
for (int i = 0; i < dest.length; i++) {
    final char c = src[i];
    if (c > Byte.MAX_VALUE)
        throw new IllegalArgumentException(
                "Invalid character found at position " + i + " for " + singleOctets);
    dest[i] = (byte) c;
...
byte[]toBytesFromASCII(final char[] chars)
to Bytes From ASCII 
final byte[] b = new byte[chars.length];
for (int i = 0; i < b.length; i++) {
    b[i] = (byte) chars[i];
return b;
byte[]toBytesFromBase64(String inBase64String)
to Bytes From Base 
if (inBase64String == null) {
    return null;
if (inBase64String.trim().isEmpty()) {
    return EMPTY_BYTES;
return Base64.getDecoder().decode(inBase64String);
byte[]toBytesFromBin(String binSymbols)
Given a string of binary symbols, convert it to an array of bytes 
if (binSymbols == null || binSymbols.trim().length() == 0) {
    return (new byte[0]);
} else if (isValidBin(binSymbols) == false) {
    throw new IllegalArgumentException("Invalid bin string specified");
binSymbols = stripBinaryPrefix(binSymbols);
while ((binSymbols.length() % 8) != 0) {
    binSymbols = "0" + binSymbols;
...
byte[]toBytesFromHexStr(String hexStr)
to Bytes From Hex Str 
int len = hexStr.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i = i + 2) {
    data[i / 2] = (byte) ((Character.digit(hexStr.charAt(i), 16) << 4)
            + Character.digit(hexStr.charAt(i + 1), 16));
return data;