Java Utililty Methods Byte Create

List of utility methods to do Byte Create

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Description

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

Method

ObjecttoByte(Object value)
to Byte 
if (value instanceof Number) {
    return ((Number) value).byteValue();
if (value instanceof String && !((String) value).isEmpty()) {
    return Byte.valueOf((String) value);
return null;
BytetoByte(Object value)
Convert an Object to a Byte. 
if (value == null)
    return null;
if (value instanceof Byte)
    return (Byte) value;
if (value instanceof String) {
    if ("".equals((String) value))
        return null;
    return new Byte((String) value);
...
bytetoByte(short unsignedByte)
Converts a short containing an unsigned byte value to the corresponding signed byte value and returns the result as a byte 
if (unsignedByte < 0 || unsignedByte > MAX_BYTE) {
    throw new IllegalArgumentException(String.format(
            "Unsigned byte values should be in the range 0..%1$d, got: %2$d", MAX_BYTE, unsignedByte));
return (byte) unsignedByte;
bytetoByte(short value, boolean first)
to Byte 
if (first)
    return (byte) (0xff & (value >> 8));
return (byte) (0xff & value);
bytetoByte(String hex)
to Byte 
return (byte) Integer.parseInt(hex, 16);
bytetoByte(String hex)
to Byte 
char[] lowChar = { '#', '0' };
char[] highChar = { '#', '0' };
int start = 0;
if (hex.startsWith("#"))
    start = 1;
else if (hex.startsWith("0x"))
    start = 2;
if (hex.length() > start + 1) {
...
bytetoByte(String hex)
returns byte of given hex string expression. 
if (hex.startsWith(HEX_PREFIX)) {
    hex = hex.replace(HEX_PREFIX, "");
int i = Integer.parseInt(hex, 16);
return (byte) i;
byte[]toByte(String hexStr)
to Byte 
byte digest[] = new byte[hexStr.length() / 2];
for (int i = 0; i < digest.length; i++) {
    String byteString = hexStr.substring(2 * i, 2 * i + 2);
    int byteValue = Integer.parseInt(byteString, 16);
    digest[i] = (byte) byteValue;
return digest;
byte[]toByte(String hexString)
to Byte 
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;
bytetoByte(String str)

Convert a String to a byte, returning zero if the conversion fails.

If the string is null, zero is returned.

 NumberUtils.toByte(null) = 0 NumberUtils.toByte("")   = 0 NumberUtils.toByte("1")  = 1 
return toByte(str, (byte) 0);