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[]fromHex(String hexString)
from Hex 
String[] data = hexString.trim().split(" ");
byte[] result = new byte[data.length];
for (int i = 0; i < data.length; i++) {
    result[i] = (byte) Integer.parseInt(data[i]);
return result;
byte[]fromHex(String hexString)
from Hex 
if (hexString == null) {
    return null;
int len = hexString.length();
if (len % 2 != 0) {
    throw new IllegalArgumentException();
byte[] data = new byte[len / 2];
...
intfromHex(String input, int max)
Converts a string from hex to integer. 
try {
    int value = Integer.parseInt(input.toLowerCase(), 16);
    if (value < 0 || value > max) {
        throw new IllegalArgumentException("Out of range: " + input);
    return value;
} catch (NumberFormatException e) {
    throw new IllegalArgumentException("Not valid hex: " + input);
...
intfromHex(String s)
from Hex 
return Integer.parseInt(s, 16);
byte[]fromHex(String s)
from Hex 
if (s.length() % 2 != 0) {
    throw new IllegalArgumentException("Hex " + s + " must be divisible by two");
byte[] bytes = new byte[s.length() / 2];
for (int i = 0; i < bytes.length; i++) {
    char left = s.charAt(i * 2);
    char right = s.charAt(i * 2 + 1);
    byte b = (byte) ((getValue(left) << 4) | (getValue(right) & 0xF));
...
byte[]fromHex(String s)
from Hex 
if (s != null) {
    try {
        StringBuilder sb = new StringBuilder(s.length());
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (!Character.isWhitespace(ch)) {
                sb.append(ch);
        s = sb.toString();
        int len = s.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            int hi = (Character.digit(s.charAt(i), 16) << 4);
            int low = Character.digit(s.charAt(i + 1), 16);
            if (hi >= 256 || low < 0 || low >= 16) {
                return null;
            data[i / 2] = (byte) (hi | low);
        return data;
    } catch (Exception ignored) {
return null;
byte[]fromHex(String s)
Converts a hex string representation of bytes into a byte array 
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
    data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
return data;
byte[]fromHex(String s)
from Hex 
byte bs[] = new byte[s.length() / 2];
for (int i = 0; i < bs.length; i++)
    bs[i] = (byte) Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16);
return bs;
bytefromHex(String s)
from Hex 
if (s.length() != 2) {
    throw new IllegalArgumentException("Invalid length of string.");
char c1 = s.charAt(0);
char c2 = s.charAt(1);
int n1 = HEX_STRING.indexOf(c1);
int n2 = HEX_STRING.indexOf(c2);
if (n1 == (-1)) {
...
byte[]fromHex(String s)
Converts hex string to byte array. 
if (!isHexString(s)) {
    throw new IllegalArgumentException("Invalid hex string:" + s);
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
    data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
return data;