Java Utililty Methods Hex Calculate

char ac[] = new char[32];
int j = 32;
byte byte0 = 16;
int k = byte0 - 1;
do {
    ac[--j] = HEX_DIGITS[i & k];
    i >>>= 4;
} while (i != 0);
...

char[] buffer = new char[8];
int index = 8;
do {
    buffer[--index] = _HEX_DIGITS[i & 15];
    i >>>= 4;
} while (i != 0);
return new String(buffer, index, 8 - index);

String s = Integer.toHexString(i).toUpperCase();
if (s.length() < 8)
    return "00000000".substring(8 - s.length()) + s;
else
    return s;

String hex = Integer.toHexString(i);
if (hex.length() == 1) {
    return "0" + hex;
} else {
    return hex;

String hexString = Integer.toHexString(i);
int len = hexString.length();
StringBuffer result = new StringBuffer();
for (int j = 0; j < digits; j++) {
    if (len < (digits - j))
        result.append("0");
    else
        result.append(hexString.charAt(len - digits + j));
...

char[] hex = new char[8];
int index = 0;
for (int i = 0; i < 4; i++) {
    final int b = (input >>> (24 - 8 * i)) & 0xFF;
    hex[index++] = HEX_CHAR_TABLE[b >>> 4];
    hex[index++] = HEX_CHAR_TABLE[b & 0xF];
String result = null;
...

String str = Integer.toHexString(iValue);
if (str.length() == 1)
    return "0" + str;
else if (str.length() == 8)
    return str.substring(6, 8);
return str;

return String.format("0x%8s", Integer.toHexString(n)).replace(' ', '0').toUpperCase();

String result = "";
while (digit-- > 0) {
    int n = number % 16;
    number /= 16;
    result = HEX_LETTER.substring(n, n + 1) + result;
return result;

StringBuilder hexString = new StringBuilder("0x");
hexString.append(formatByteToPaddedHex(a, 2));
hexString.append(formatByteToPaddedHex(r, 2));
hexString.append(formatByteToPaddedHex(g, 2));
hexString.append(formatByteToPaddedHex(b, 2));
return hexString.toString();