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

inttoBytes(Object value)
Converts a string to a bytes integer, interpreting 'b', 'kb', 'mb', 'gb' and 'tb' suffixes. 
if (value == null)
    return 0;
if (value instanceof Number)
    return ((Number) value).intValue();
else {
    String s = value.toString();
    if (s.endsWith("kb"))
        return (int) (Float.parseFloat(s.substring(0, s.length() - 2)) * 1024f);
...
byte[]toBytes(short s)
to Bytes 
byte[] bytes = new byte[2];
bytes[0] = (byte) (s & 0xff);
bytes[1] = (byte) ((s >> 8) & 0xff);
return bytes;
byte[]toBytes(short s)
to Bytes 
return new byte[] { (byte) (s & 0x00FF), (byte) ((s & 0xFF00) >> 8) };
voidtoBytes(short sVal, byte[] bytes, boolean bigEndian)
Converts a short into a byte array. 
if (bigEndian) {
    bytes[0] = (byte) (sVal >> 8);
    bytes[1] = (byte) (sVal & 0xff);
} else {
    bytes[0] = (byte) (sVal & 0xff);
    bytes[1] = (byte) (sVal >> 8);
byte[]toBytes(short value)
Convert a short to a byte array 
byte[] bytes = new byte[2];
toBytes(value, bytes, 0);
return bytes;
byte[]toBytes(short value)
to Bytes 
byte[] buf = new byte[2];
toBytes(value, buf);
return buf;
byte[]toBytes(String hex)
Convert hex string to byte array. 
String data = hex.length() % 2 == 1 ? "0" + hex : hex;
byte[] result = new byte[data.length() / 2];
for (int i = 0; i < result.length; i++) {
    result[i] = (byte) Integer.parseInt(data.substring(2 * i, 2 * i + 2), 16);
return result;
byte[]toBytes(String hex)
to Bytes 
byte[] bts = new byte[hex.length() / 2];
for (int i = 0; i < bts.length; i++) {
    bts[i] = (byte) Integer.parseInt(hex.substring(2 * i, 2 * i + 2), 16);
return bts;
byte[]toBytes(String hex)
Convert Hex string to byte array hex string format is: 2 char represent one byte,can use space as separator for example, "12 1e 3d ee FF 09" 
byte[] buff = new byte[hex.length() / 2];
int s1, s2, count = 0;
for (int i = 0; i < hex.length(); i++) {
    if (hex.charAt(i) >= '0' && hex.charAt(i) <= '9')
        s1 = hex.charAt(i) - 48;
    else if (hex.charAt(i) >= 'A' && hex.charAt(i) <= 'F')
        s1 = hex.charAt(i) - 55;
    else if (hex.charAt(i) >= 'a' && hex.charAt(i) <= 'f')
...
byte[]toBytes(String hex)
Convert a hex string to a byte[]. 
if (hex == null || hex.length() % 2 != 0)
    throw new IllegalArgumentException();
byte[] ret = new byte[hex.length() / 2];
for (int i = 0, j = 0; i < hex.length(); i += 2, j++) {
    int high = charToNibble(hex.charAt(i));
    int low = charToNibble(hex.charAt(i + 1));
    ret[j] = (byte) ((high << 4) | low);
return ret;