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[]fromHexBinary(String s)
from Hex Binary 
int len = s.length();
if (len % 2 != 0)
    return null;
byte out[] = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
    int h = hexToBin(s.charAt(i));
    int l = hexToBin(s.charAt(i + 1));
    if (h == -1 || l == -1)
...
intfromHexChar(char ch)
Convert the given hex character (0-9, A-Z, or a-z) into its decimal equivalent value. 
switch (ch) {
case '0':
    return 0;
case '1':
    return 1;
case '2':
    return 2;
case '3':
...
intfromHexChars(char[] chars, int i)
from Hex Chars 
int n1 = chars[i] >= 'A' ? (10 + (chars[i] - 'A')) : (chars[i] - '0');
i++;
int n2 = chars[i] >= 'A' ? (10 + (chars[i] - 'A')) : (chars[i] - '0');
byte b = (byte) ((n1 << 4) | n2);
return b & 0xFF;
byte[]fromHexDigest(String hexDigest)
from Hex Digest 
if (hexDigest == null || hexDigest.length() == 0) {
    return null;
hexDigest = hexDigest.toLowerCase();
int digestLength = hexDigest.length() / 2;
if (digestLength == 0 || 2 * digestLength != hexDigest.length()) {
    return null;
byte[] digest = new byte[digestLength];
for (int i = 0; i < hexDigest.length() / 2; i++) {
    if (!isHex(hexDigest.charAt(2 * i)) || !isHex(hexDigest.charAt(2 * i + 1))) {
        return null;
    int hi = Character.digit(hexDigest.charAt(2 * i), 16) << 4;
    int lo = Character.digit(hexDigest.charAt(2 * i + 1), 16);
    Integer ib = new Integer(hi | lo);
    byte b = ib.byteValue();
    digest[i] = b;
return digest;
intfromHexDigit(final char c)
from Hex Digit 
final int ret = Character.digit(c, 16);
if (ret == -1) {
    throw new NumberFormatException("Not a valid hex digit: " + c);
return ret;
intfromHexDigit(int c)
from Hex Digit 
if (c >= 0x30 && c < 0x3A)
    return c - 0x30;
else if (c >= 0x41 && c < 0x47)
    return c - 0x37;
else if (c >= 0x61 && c < 0x67)
    return c - 0x57;
else
    throw new NumberFormatException('\'' + c + "' is not a valid hexadecimal digit.");
...
bytefromHexNibble(char n)
Convert a hexadecimal digit to a byte. 
if (n <= '9')
    return (byte) (n - '0');
if (n <= 'G')
    return (byte) (n - ('A' - 10));
return (byte) (n - ('a' - 10));
bytefromHexNibble(final char n)

Convierte un caracter de texto hexadecimal a su equivalente binario.

if (n <= '9') {
    return (byte) (n - '0');
if (n <= 'G') {
    return (byte) (n - ('A' - 10));
return (byte) (n - ('a' - 10));
intfromHexShort(char a)
from Hex Short 
if (a >= '0' && a <= '9') {
    return a - '0';
if (a >= 'a' && a <= 'f') {
    return 10 + (a - 'a');
throw new RuntimeException();
int[]fromHexStr(final String data)
Convert a string with hex encoded bytes. 
final int length = data.length();
if (length % 2 != 0)
    throw new IllegalArgumentException("Length of hex data must be a multiple of 2!");
final int size = length / 2;
final int[] result = new int[size];
for (int i = 0; i < size; i++) {
    final int pos = i * 2;
    result[i] = Integer.parseInt(data.substring(pos, pos + 2), 16);
...