Java Utililty Methods Byte to Hex String

int n = b;
if (n < 0)
    n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return chars[d1] + chars[d2];

String result = "";
byte upperByte = (byte) ((b & 0xf0) >> 4);
result += byteToChar(upperByte);
byte lowerByte = (byte) ((b & 0x0f));
result += byteToChar(lowerByte);
return result;

StringBuilder sb = new StringBuilder();
sb.append(String.format("%02x", b & 0xff));
return sb.toString();

int n = b;
if (n < 0)
    n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];

char[] ch = new char[2];
ch[0] = ac[(b >>> 4 & 0xF)];
ch[1] = ac[(b & 0xF)];
String s = new String(ch);
return new String(ch);

StringBuffer retString = new StringBuffer();
for (int i = 0; i < bytes.length; ++i) {
    retString.append(Integer.toHexString(0x0100 + (bytes[i] & 0x00FF)).substring(1));
return retString.toString();

StringBuilder hexStrBuff = new StringBuilder(2);
String hexByteStr = Integer.toHexString(data & 0xff).toUpperCase();
if (hexByteStr.length() == 1) {
    hexStrBuff.append("0");
hexStrBuff.append(hexByteStr);
return hexStrBuff.toString();

StringBuffer buf = new StringBuffer();
buf.append(toHexChar((data >>> 4) & 0x0F));
buf.append(toHexChar(data & 0x0F));
return buf.toString();

char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
char[] ob = new char[2];
ob[0] = Digit[(ib >>> 4) & 0X0f];
ob[1] = Digit[ib & 0X0F];
String s = new String(ob);
return s;

StringBuffer out = new StringBuffer(2);
byte ch = (byte) (in & 0xF0);
ch = (byte) (ch >>> 4);
ch = (byte) (ch & 0x0F);
out.append(hexChars[(int) ch]); 
ch = (byte) (in & 0x0F); 
out.append(hexChars[(int) ch]); 
return out.toString();
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