Java Utililty Methods Hex Convert To

List of utility methods to do Hex Convert To

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Description

The list of methods to do Hex Convert To are organized into topic(s).

Method

byte[]fromHexString(String s)
from Hex String 
if (s.length() % 2 != 0)
    throw new IllegalArgumentException(s);
byte[] array = new byte[s.length() / 2];
for (int i = 0; i < array.length; i++) {
    int b = Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16);
    array[i] = (byte) (0xff & b);
return array;
...
byte[]fromHexString(String s)
Decode a Hex-String to a byte Array. 
if (!s.matches(REGEXP_HEX))
    throw new IllegalArgumentException("cannot parse '" + s + "'");
int length = (int) Math.ceil(s.length() / 2.0);
byte[] bytes = new byte[length];
int c = s.length() - 2;
for (int i = length - 1; i >= 0; i--) {
    bytes[i] = (byte) Integer.parseInt(s.substring(c < 0 ? 0 : c, c + 2), 16);
    c = c - 2;
...
byte[]fromHexString(String s)
from Hex String 
if (s.length() % 2 != 0)
    throw new IllegalArgumentException(s);
byte[] array = new byte[s.length() / 2];
for (int i = 0; i < array.length; i++) {
    int b = Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16);
    array[i] = (byte) (0xff & b);
return array;
...
byte[]fromHexString(String s)
from Hex String 
int len = s.length();
if ((len & 1) != 0) {
    s = (new StringBuilder()).append("0").append(s).toString();
    len = s.length();
byte b[] = new byte[len / 2];
int i = 0;
for (int j = 0; i < len; j++) {
...
byte[]fromHexString(String s)
Convert a string containing hexadecimal characters to a byte-array. 
char[] rawChars = s.toUpperCase().toCharArray();
int hexChars = 0;
for (int i = 0; i < rawChars.length; i++) {
    if ((rawChars[i] >= '0' && rawChars[i] <= '9') || (rawChars[i] >= 'A' && rawChars[i] <= 'F')) {
        hexChars++;
byte[] byteString = new byte[(hexChars + 1) >> 1];
...
byte[]fromHexString(String s, int offset, int length)
Convert a hexidecimal string generated by toHexString() back into a byte array. 
if ((length % 2) != 0)
    return null;
byte[] byteArray = new byte[length / 2];
int j = 0;
int end = offset + length;
for (int i = offset; i < end; i += 2) {
    int high_nibble = Character.digit(s.charAt(i), 16);
    int low_nibble = Character.digit(s.charAt(i + 1), 16);
...
byte[]fromHexString(String str)
from Hex String 
str = cleanHexString(str);
int stringLength = str.length();
if ((stringLength & 0x1) != 0) {
    throw new IllegalArgumentException("fromHexString requires an even number of hex characters");
byte[] b = new byte[stringLength / 2];
for (int i = 0, j = 0; i < stringLength; i += 2, j++) {
    int high = convertChar(str.charAt(i));
...
byte[]fromHexString(String text)
Convert a String containing consecutive (no inside whitespace) hexadecimal digits into a corresponding byte array. 
text = text.trim();
if (text.length() % 2 != 0)
    text = "0" + text;
int resLen = text.length() / 2;
int loNibble, hiNibble;
byte[] res = new byte[resLen];
for (int i = 0; i < resLen; i++) {
    int j = i << 1;
...
byte[]fromHexString(String value)
from Hex String 
byte[] rs = new byte[value.length() / 2];
for (int i = 0; i < value.length(); i += 2) {
    String b = value.substring(i, i + 2);
    rs[i / 2] = Integer.valueOf(b, 16).byteValue();
return rs;
byte[]fromHexToBytes(String hex)
from Hex To Bytes 
int x = hex.length() / 2;
byte[] b = new byte[x];
int index = 0;
for (int i = 0; i < hex.length(); i += 2) {
    byte b1 = toByte(hex.charAt(i));
    byte b2 = toByte(hex.charAt(i + 1));
    b[index++] = (byte) ((b1 << 4) + b2);
return b;