Java Utililty Methods Hex Calculate

char[] chars = new char[2];
int d = (b & 0xF0) >> 4;
int m = b & 0x0F;
chars[0] = hexTable[d];
chars[1] = hexTable[m];
return new String(chars);

String s = Integer.toHexString(b);
s = s.toUpperCase();
StringBuffer sb = new StringBuffer();
int len = s.length();
if (len == 1) {
    sb.append("0").append(s);
} else if (len == 2) {
    sb.append(s);
...

StringBuffer sb = new StringBuffer("00");
sb.append(Integer.toHexString(b));
return sb.substring(sb.length() - 2);

return toHexString(null, b).toString();

String s = Integer.toHexString(b & 0xFF).toUpperCase();
return (s.length() == 2) ? (s) : ("0" + s);

String hex = Integer.toHexString((int) b & 0xff);
if (hex.length() == 1) {
    return ('0' + hex);
} else {
    return hex;

StringBuffer result = new StringBuffer(3);
result.append(Integer.toString((b & 0xF0) >> 4, 16));
result.append(Integer.toString(b & 0x0F, 16));
return result.toString();

StringBuffer hexString = new StringBuffer();
for (int i = 0; i < b.length; i++) {
    String plainText = Integer.toHexString(0xff & b[i]);
    if (plainText.length() < 2)
        plainText = "0" + plainText;
    hexString.append(plainText);
return hexString.toString();
...

int pos = 0;
char[] c = new char[b.length * 2];
for (int i = 0; i < b.length; i++) {
    c[pos++] = toHex[(b[i] >> 4) & 0x0F];
    c[pos++] = toHex[b[i] & 0x0f];
return new String(c);

StringBuffer sb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
    sb.append(HEX_CHARS.charAt(b[i] >>> 4 & 0xf));
    sb.append(HEX_CHARS.charAt(b[i] & 0xf));
return sb.toString();