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(Number[] array)
Turns the Number array into one consisting of primitive bytes. 
byte[] result;
int i;
result = new byte[array.length];
for (i = 0; i < array.length; i++)
    result[i] = array[i].byteValue();
return result;
byte[]toByteArray(Object obj)
to Byte Array 
if (obj instanceof Object[]) {
    Object[] arr = (Object[]) obj;
    byte[] byteArr = new byte[arr.length];
    for (int i = 0; i < arr.length; i++) {
        if (arr[i] instanceof Integer) {
            byteArr[i] = ((Integer) arr[i]).byteValue();
        } else if (arr[i] instanceof Double) {
            byteArr[i] = ((Double) arr[i]).byteValue();
...
byte[]toByteArray(Object value)
to Byte Array 
if (value == null) {
    return null;
} else if (value instanceof byte[]) {
    return (byte[]) value;
} else {
    throw new IllegalArgumentException();
byte[]toByteArray(short foo)
Description of the Method 
return toByteArray(foo, new byte[2]);
byte[]toByteArray(String address)
to Byte Array 
byte[] result = new byte[4];
String[] strings = address.split("\\.");
for (int i = 0, n = strings.length; i < n; i++) {
    result[i] = (byte) Integer.parseInt(strings[i]);
return result;
byte[]toByteArray(String binString)
to Byte Array 
if (binString == null) {
    return null;
binString = binString.replaceAll(" ", "");
if (binString.isEmpty()) {
    return new byte[0];
int length = binString.length();
...
byte[]toByteArray(String bytesStr, int byteLength)
to Byte Array 
if (bytesStr == null) {
    return new byte[byteLength];
if (bytesStr.length() != (byteLength * 2)) {
    return null;
final byte[] result = new byte[byteLength];
for (int index = 0; index < byteLength; index++) {
...
byte[]toByteArray(String content, String charsetName)
to Byte Array 
byte[] bytes;
try {
    bytes = content.getBytes(charsetName);
} catch (Exception ex) { 
    bytes = content.getBytes();
return bytes;
byte[]toByteArray(String hex)
to Byte Array 
int len = (hex.length() + 1) / 3;
byte[] data = new byte[len];
for (int i = 0; i < len; i++) {
    data[i] = (byte) ((Character.digit(hex.charAt(i * 3), 16) << 4)
            + Character.digit(hex.charAt(i * 3 + 1), 16));
return data;
byte[]toByteArray(String hex)
Returns a byte array from a String containing hex encoding bytes. 
byte[] bytes = null;
if (hex != null) {
    bytes = new byte[hex.length() / 2];
    for (int i = 0; i < hex.length(); i += 2) {
        char ch1 = hex.charAt(i);
        char ch2 = hex.charAt(i + 1);
        bytes[i / 2] = (byte) hexCharsToByte(ch1, ch2);
return bytes;