Java Utililty Methods Byte to Hex String

Converts the given byte value to hex string.

return toHexString(byteToUnsignedLong(num), '0', 2, 2);

StringBuilder stringBuilder = new StringBuilder("");
int v = src & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
    stringBuilder.append(0);
stringBuilder.append(hv);
return stringBuilder.toString();
...

final StringBuilder hex = new StringBuilder(2);
byte b = value;
hex.append(HEXES.charAt((b & 0xF0) >> 4)).append(HEXES.charAt((b & 0x0F)));
return hex.toString();

String temp = null;
switch ((value & 0xF0) >> 4) {
case 0:
    temp = "0";
    break;
case 1:
    temp = "1";
    break;
...

byte[] buff = new byte[2 * b.length];
for (int i = 0; i < b.length; i++) {
    buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
    buff[2 * i + 1] = hex[b[i] & 0x0f];
return new String(buff);

StringBuffer hexString = new StringBuffer();
for (int i = 0; i < b.length; i++) {
    String hex = Integer.toHexString(b[i] & 0xFF);
    if (hex.length() == 1) {
        hex = '0' + hex;
    hexString.append(hex.toUpperCase());
return hexString.toString();

StringBuffer sb = new StringBuffer(bytes.length * 2);
for (int i = 0; i < bytes.length; i++) {
    int v = bytes[i] & 0xff;
    if (v < 16) {
        sb.append('0');
    sb.append(Integer.toHexString(v));
return sb.toString().toUpperCase();

if (bytes == null) {
    throw new IllegalArgumentException("bytes == null");
StringBuilder s = new StringBuilder();
for (int i = start; i < end; i++) {
    s.append(String.format("%02x", bytes[i]));
return s.toString();
...

if (bytes == null) {
    throw new IllegalArgumentException("bytes == null");
StringBuilder s = new StringBuilder();
for (int i = start; i < end; i++) {
    s.append(String.format("%02x", bytes[i]));
return s.toString();
...

StringBuilder sb = new StringBuilder();
for (byte b : data) {
    sb.append(String.format("%02X", b));
return sb.toString();