src/main/java/org/jivesoftware/smack/util/StringUtils.java
public static String encodeHex(byte[] bytes) {
        StringBuilder hex = new StringBuilder(bytes.length * 2);

        for (byte aByte : bytes) {
            if (((int) aByte & 0xff) < 0x10) {
                hex.append("0");
            }
            hex.append(Integer.toString((int) aByte & 0xff, 16));
        }

        return hex.toString();
    }
public static String encodeHex(byte[] bytes) {
        StringBuilder hex = new StringBuilder(bytes.length * 2);

        for (byte aByte : bytes) {
            if (((int) aByte & 0xff) < 0x10) {
                hex.append("0");
            }
            hex.append(Integer.toString((int) aByte & 0xff, 16));
        }

        return hex.toString();
    }
public static String encodeHex ( byte [ ] bytes ) { StringBuilder hex = new StringBuilder ( bytes . length * 2 ) ; for ( byte aByte : bytes ) { if ( ( ( int ) aByte & 0xff ) < 0x10 ) { hex . append ( "0" ) ; } hex . append ( Integer . toString ( ( int ) aByte & 0xff , 16 ) ) ; } return hex . toString ( ) ; }
Encodes an array of bytes as String representation of hexadecimal.

@param bytes
an array of bytes to convert to a hex string.
@return generated hex string.
Encodes an array of bytes as String representation of hexadecimal .