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[]toBytes(String hex)
to Bytes 
if (hex == null || hex.length() == 0 || hex.length() % 2 == 1)
    return null;
int byteCount = hex.length() / 2;
byte[] bytes = new byte[byteCount];
for (int i = 0; i < byteCount; i++) {
    int beginIndex = i * 2;
    bytes[i] = (byte) Integer.parseInt(hex.substring(beginIndex, beginIndex + 2), 16);
return bytes;
byte[]toBytes(String hex)
Convert hex string to byte[] 
if (hex == null || hex.equals("")) {
    return null;
hex = hex.toUpperCase();
int length = hex.length() / 2;
char[] hexChars = hex.toCharArray();
byte[] d = new byte[length];
for (int i = 0; i < length; i++) {
...
byte[]toBytes(String hexStr)
to Bytes 
String src = hexStr.replaceAll("\\s+", "").trim();
int len = src.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
    data[i / 2] = (byte) ((Character.digit(src.charAt(i), 16) << 4)
            + Character.digit(src.charAt(i + 1), 16));
return data;
...
byte[]toBytes(String hexStr)
Converts a hexadecimal ASCII string to a byte array. 
byte mask = (byte) 0x7F;
byte[] bytes = new byte[0];
if (hexStr != null) {
    hexStr = hexStr.toUpperCase();
    int len = hexStr.length();
    bytes = new byte[(len / 2)];
    int sPos = 0; 
    int bPos = 0; 
...
byte[]toBytes(String hexString)
to Bytes 
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++) {
    result[i] = Integer.valueOf(hexString.substring(2 * i, (2 * i) + 2), 16).byteValue();
return result;
byte[]toBytes(String hexString)
Get the byte representation of an ASCII-HEX string. 
if (hexString == null || hexString.length() % 2 != 0) {
    throw new RuntimeException("Input string must contain an even number of characters");
char[] hex = hexString.toCharArray();
int length = hex.length / 2;
byte[] raw = new byte[length];
for (int i = 0; i < length; i++) {
    int high = Character.digit(hex[i * 2], 16);
...
byte[]toBytes(String name)
to Bytes 
return name.getBytes();
longtoBytes(String s)
to Bytes 
long size = 0;
if (s.endsWith("K") || s.endsWith("k")) {
    size = Long.valueOf(s.substring(0, s.length() - 1).trim()) * 1024;
} else if (s.endsWith("M") || s.endsWith("m")) {
    size = Long.valueOf(s.substring(0, s.length() - 1).trim()) * 1024 * 1024;
} else if (s.endsWith("G") || s.endsWith("g")) {
    size = Long.valueOf(s.substring(0, s.length() - 1).trim()) * 1024 * 1024;
return size;
byte[]toBytes(String s, int len, byte pad)
Routine to convert a string to bytes and pad with a character up to a given length. 
if (s == null)
    throw new IllegalArgumentException("null string provided");
byte[] out = new byte[len];
for (int i = 0; i < len; i++) {
    if (i > s.length()) {
        out[i] = pad;
    } else {
        out[i] = (byte) s.charAt(i);
...
inttoBytes(String str, byte[] bytes, int index)
Convert string to bytes and store them in the array starting at the given index. 
int typeBytes = Character.SIZE / Byte.SIZE;
checkBounds(bytes, index, typeBytes * str.length());
for (int i = 0; i < str.length(); i++) {
    char c = str.charAt(i);
    for (int j = typeBytes - 1; j >= 0; j--) {
        int shiftBits = Byte.SIZE * j;
        byte b = (byte) (c >> shiftBits);
        bytes[index++] = b;
...