Java Utililty Methods Byte Array to Hex String

List of utility methods to do Byte Array to Hex String

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Description

The list of methods to do Byte Array to Hex String are organized into topic(s).

Method

Stringbytes2hexStr(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();
...
Stringbytes_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;
Stringbytes_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);
voidbytesToHexAppend(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;
StringbytesToHexChecksum(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();
StringbytesToHexDelimeter(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());
StringbytesToHexFormatted(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);