Java Utililty Methods Byte Array to Hex String

String bytes2hexStr(byte[] arr, int len)
Function: bytes2hexStr (byte [] arr, int len)( Generate a hex string showing the value of the bytes in ARR.

StringBuffer sb = new StringBuffer(len * 2);
for (int i = 0; i < len; i++) {
 int hi = (arr[i] >>> 4) & 0xf;
 sb.append(hex[hi]);
 int low = (arr[i]) & 0xf;
 sb.append(hex[low]);
return sb.toString();
...

String bytes_to_hex(byte[] b)
bytethex

String result = "";
for (int i = 0; i < b.length; i++) {
 result += Integer.toString((b[i] & 0xff) + 0x100, 16).substring(1);
return result;

String bytes_to_hex(byte[] bytes)
bytethex

char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
 int v = bytes[j] & 0xFF;
 hexChars[j * 2] = hexArray[v >>> 4];
 hexChars[j * 2 + 1] = hexArray[v & 0x0F];
return new String(hexChars);

void bytesToHexAppend(byte[] bs, int off, int length, StringBuffer sb)
bytes To Hex Append

sb.ensureCapacity(sb.length() + length * 2);
for (int i = off; i < (off + length) && i < bs.length; i++) {
 sb.append(Character.forDigit((bs[i] >>> 4) & 0xf, 16));
 sb.append(Character.forDigit(bs[i] & 0xf, 16));

char[] bytesToHexChars(byte[] bytes)
bytes To Hex Chars

return bytesToHexChars(bytes, new char[bytes.length * 2], 0);

char[] bytesToHexChars(byte[] bytes)
Transforms bytes to an array of hex characters representing the nibbles

char[] chars = new char[bytes.length * 2];
int charPos = chars.length - 1;
for (int bytePos = bytes.length - 1; bytePos >= 0; bytePos--) {
 chars[charPos--] = HEX.charAt(bytes[bytePos] & 0x0f);
 chars[charPos--] = HEX.charAt((bytes[bytePos] & 0xf0) >> 4);
return chars;

char[] bytesToHexChars(byte[] bytes)

Convert binary data into a sequence of pairs of hexadecimal character values.

if (bytes == null)
 throw new NullPointerException("Cannot convert a null byte array to hex string.");
char[] chars = new char[bytes.length * 2];
int charCounter = 0;
for (int x = 0; x < bytes.length; x++) {
 chars[charCounter++] = hexChars[(bytes[x] >>> 4) & 0x0f];
 chars[charCounter++] = hexChars[bytes[x] & 0x0f];
return chars;

String bytesToHexChecksum(byte[] byteArr)
bytes To Hex Checksum

StringBuilder buf = new StringBuilder();
for (int i = 0; i < byteArr.length; i++) {
 buf.append(Integer.toHexString(0xFF & byteArr[i]).toUpperCase());
return buf.toString();

String bytesToHexDelimeter(byte[] data, String delimeter)
Convenience method to convert a byte array to a hex string and seperate with delimeter.

if (data == null)
 return "null";
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
 buf.append(byteToHex(data[i]).toUpperCase());
 if (i != data.length - 1) {
 buf.append(delimeter);
return (buf.toString());

String bytesToHexFormatted(byte[] bytes)
bytes To Hex Formatted

char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
 int v = bytes[j] & 0xFF;
 hexChars[j * 2] = hexArray[v >>> 4];
 hexChars[j * 2 + 1] = hexArray[v & 0x0F];
return new String(hexChars);