If you need to convert an array of bytes to a hex string in Scala, I can confirm that this code works: def convertBytesToHex(bytes: Seq[Byte]): String = { val sb = new StringBuilder for (b <- bytes) { sb. My image is not in the resources directory because it is taken from a blob field through a byte array. In the example that follows, we will then convert that byte array back to a string, effectively showing you how to do the conversion both ways. Following is the declaration for java. for i from 1 to 52 j := i + randomInt(53 - i) - 1 a. Look for all comments mentioned in below Java program. The class String includes methods for examining individual characters, comparing strings, searching strings, extracting parts of strings, and for converting an entire string uppercase and lowercase. Converts the HEX string back to a byte array so I can decrypt. It is useful for seeing exactly what is in a file, byte-by-byte. Finally convert byte array to base64 string. Java Tutorials and Examples. Below is an example that converts a string into a byte array. The online byte converter utility converts bits, bytes, kilobytes, megabytes, terabytes and gives the Hexadecimal value. You can pass String array and it will return a CSV String. ArrayOfBytesToFile. Here, we created a function void string2ByteArray(char* input, BYTE* output), to convert ASCII string to BYTE array, the final output (array of integers) is storing in arr variable, which is passed as a reference in the function. Rate this: This string should be converted to a byte array in androidlike 0x12 0x34 0x56 0x78 0xab 0xcd 0xef 0xgh. For large byte arrays and where performance is important you can use the following utility method to convert each byte to its binary representation. The post briefs above how you can convert byte Array to Hex values and print those on terminal. num Number of bytes to copy. A number is very much like a C or Java number, except that the octal and hexadecimal formats are not used. I have an array of bytes and I want to convert it into corresponding hexadecimal values. Converts the byte array to an HEX string 2. Cmdlet looked at the string of hexadecimal numbers. public CarrierIdentifier (@NonNull String mcc, @NonNull String mnc, @Nullable String spn, @Nullable String imsi , @Nullable String gid1 , @Nullable String gid2 , int carrierid , int specificCarrierId ) {. ToArray(); convert that string array to int array. These numbers are ASCII codes for the lowercase letters "abc. We should get equal size of ASCII value byte array and hex value byte array. String to hex. Returns a concatenation of the elements in array_expression as a STRING. join('') } But I am not getting the right result. Some of them didn't look to clean. [JAVA, Android] String to Byte array, Byte array to String (문자열을 바이트배열로 바꾸기, 바이트 배열을 문자열로 바꾸기) 마블마블 마블랑 2018. How to Convert byte[] to hex string in C# ? Below is a sample code snippet demonstrating how to achieve this. ASP function to convert a string to a byte array. This name is used as the resource ID to reference the array. Questions: I have an integer that was generated from an android. You have to create strings to display the values stored in these variables. It works in a similar way to printf but it will put the characters in a C string ( a character array ) instead of stdout Using this is not as easy as with streams as the format string changes depending on the type of the number which needs to be converted. A char array is a byte arrray. NET Framework is provides functionality to convert base datatypes to an array of bytes, and an array of bytes to base data types. BitConverter class supports this encoding. 04 21:27 안녕하세요 마블랑입니다. I can get the WWN back but it is contained as an 8 byte array. Convert a hexadecimal string to a float. * * This implementation follows the example of David Flanagan's book * "Java In A Nutshell", and converts a byte array into a String * of hex characters. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Hi, I have this hex string, 111111111A12 , (basicall it a MAC Address). append(String. @Sparr is right, but I guess you expected byte array like byte[] in C#. The byte array comes from a string I create on a asmx webservice and I use Base64 coding. We need to prepare hex string before could convert hex to a byte array and vice versa, and I noticed many forum create a small function to do the conversion from string to hex and convert a string to byte. I’m doing conversion to hex string in a pretty large loop, so I tried several techniques in order to find the fastest one. You can implement an easy "decimalToHex(dec as Int) as String" method to turn those decimal values into hex values. T4Byte = array [0. You need to convert each byte pair to an Int, then pass those. BluetoothLeConnection(String macAddress, int maxTimeoutForRead, int timeToWaitForMoreData, android. Convert numerical value to string Returns a string with the representation of val. Dec 01, 2016 · I am trying to convert byte[] to Hex string and same Hex string to byte[] in android , data got mismatched. WLRequestListener listener). The format used is the same that printf would print for the corresponding type:. First you need to convert your Hex string to Byte[]. How should i convert this m_Track1buffer to Hex string. I am trying to learn Regex, as such I have a String object which is a sequence of hex bytes: "0023C35B78CE"; Now I want to use the split method to explode this sequence into the format 00-23-C3-5B-78-CE I understand there are probably better alternatives, but I would rather use Regex because I want to run a test on this. Frequently, a program ends up with numeric data in a string object—a value entered by the user, for example. The class String includes methods for examining individual characters, comparing strings, searching strings, extracting parts of strings, and for converting an entire string uppercase and lowercase. given the bytes [116, 111, 110. Globalization. Line 9 : char타입의 포인터를 byte 타입으로 변환합니다. hex To Decimal: 6. 4, use of ByteBuffer makes these conversions easier, keeping the details of the conversion obfuscated. And basically, you can send anything, because there’s a byte array at the core of it. I can get the WWN back but it is contained as an 8 byte array. sizeof function gave correct length when i used BYTE[]. But I'll assume you mean an array of bytes. Something like that: my specific string 0x0F 0x2C 0x98 0xBC How can I parse this string in the arduino to get an array of hex val. Android E-learning and STEM related apps publication. array of n elements into a hex string For e. Convert the base64 string to byte array. For large byte arrays and where performance is important you can use the following utility method to convert each byte to its binary representation. Online tool for hex decoding a string. You may have to register before you can post: click the register link above to proceed. Hex; public class StringToAscii { public static void main( String[] Java - Hex to string chinese,chinese hex 2 byte ,english hex 1byte?. For windows application i am using your library. This procedure is repeated for the remaining three sensors. Unfortunately, Bluetooth can be confusing to use for those unfamiliar with the process. using System; public class Example { public static void Main() { // Define a byte array. Using built-in base64 encoders is not allowed. I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array. So here is the complete step by step tutorial for Convert Bitmap image to Byte Array in android example. DatatypeConverter already provides a method for encoding/decoding Base64 data. The following code examples are extracted from open source projects. I am trying to learn Regex, as such I have a String object which is a sequence of hex bytes: "0023C35B78CE"; Now I want to use the split method to explode this sequence into the format 00-23-C3-5B-78-CE I understand there are probably better alternatives, but I would rather use Regex because I want to run a test on this. byte[] val = new byte[str. My image is not in the resources directory because it is taken from a blob field through a byte array. This topic shows how to convert the bytes from a byte array into a string. / bcprov / src / main / java / org / bouncycastle / util. Strings won't work the same. I have a RC522 RFID Module connected to an Arduino UNO and I want to be able to read TAGS and then compare the read ID to a string. Amazing answer, could decode a base64 string request, used hex to convert the byte array with the provided solution and it worked like a charm – dantebarba Jan 6 '17 at 19:20. HexDump lists the contents of a file in hex and ASCII. Encoding utf_8 = System. Frequently, a program ends up with numeric data in a string object—a value entered by the user, for example. Veröffentlicht von Greenberet am 04. Since 12+34=46 isn't a multiple of 8, we also need to round up to the next multiple of 8 (48). toString(16) }). That said, the following will convert your byte array to a string array containing formatted hex values:. byte[] byteArray1 = { 80, 65, 78, 75, 65, 74 }; String str = new String(byteArray1, 0, 3, StandardCharsets. toString } I just used this code as part of a checksum algorithm (SHA-1, SHA-256, etc. This example outputs the hexadecimal value of each character in a string. CalendarAlerts. I used that read method. But it gave wrong hex string values. BillWoodruff 29-Nov-13 2:23am Every ASCII character in a string, if converted to hex, takes two bytes to represent. The framework passes this identifier on the network and uses it to uniquely distinguish instances. Parsing and Formatting a Byte Array into Octal: 2. I will be using Apache Commons Codec library to achieve the ‘Convert Image to String and String to Image in Java’. toString(16) didn’t work for me since I needed negative values to be properly encoded. I also have a command line version of hexdump that you can download and run. The logic behind to implement this program - separate both character that a hexadecimal value contains, and get their integer values and then multiply with 16 (as hexadecimal value's base is 16) and then add second value, simply you will integer value. Others have shown you how to convert it to a string assuming the byte* is a pointer to a character array. I suppose a full test would be what you've done before, which is to take an array from 0x00 through 0xFF and convert that from pure binary to a HEX string using your toHex() function, validate that you did it all, and then convert the HEX string back to binary bytes and validate that this worked. Converting Strings to Numbers. See post #4 for details. This Java Example shows you how to read a file into a byte array, and save the byte array back to a new file via the classic try-catch-try-catch, JDK 7 try-resources and Java. How to convert Byte[] Array to String in Java? There are two ways you can do it. The fastest appender in StringBuilder is the character appender. I know that you can use printf and also use StringBuilder. Frequently, a program ends up with numeric data in a string object—a value entered by the user, for example. Sending and Receiving Data via Bluetooth with an Android Device Brian Wirsing March 26, 2014 Abstract Android developers often need to use Bluetooth in their projects. CalendarAlerts. EDIT :- Version 1. The file pointer is located at 0 when the file is opened. It becomes really helpful in case you want to upload image to server or save the image in database. These numbers are ASCII codes for the lowercase letters "abc. the four byte integer (as hexadecimal) 0x1DCD6507, can be thought of as a string of digits. I have a legacy method toHex(byte[]) used in my application since the beginning of time to store a hexadecimal representation of a byte[] into the database. • String: immutable type for sequence of characters –Every Java variable can be converted to Stringvia toString() –The +operation concatenates Strings with other variables –Let strbe a String. online Byte converter. You should not ask for 24 bytes if you use SHA1 for PBKDF2, it requires the entire number of rounds to be repeated. By creating new String Object and assign byte[] to it. ArrayOfBytesToFile. Dim company As String Dim b() As Byte company = "CHILKAT SOFTWARE" b = StrConv(company,vbFromUnicode) ' We now have a byte array containing 'C', 'H', 'I', 'L',. The following code block shows how to convert a byte array in to base64 string The following code shows how how to convert base64 encoded string to bytes. Often, some kind of separator is used to make the encoded data easier for human reading. String class has getBytes() method which can be used to convert String to byte array in Java. How to convert Hex to ASCII in Java. The contents are initialized to 0. I was not in luck with google so far. In the preceding example, 52 is a magic number. Convert byte array to Hex string: 39. i have a question here. One of the reasons hexadecimal is so nice is because 1 hexa digit is equal to a nibble or 4 bits, so if I were supposed to convert your string into a byte string it would have to be like: Code: A4 50 5D 0B 0F 6A ED AA 10100100 0101000 01011101 00001011 00001111 01101010 11101101 10101010. transforms a byte array into a hex dump. getBytes method. BluetoothLeConnection(String macAddress, int maxTimeoutForRead, int timeToWaitForMoreData, android. It might be possible that your byte array contain non-printable ASCII characters. char const hex_chars[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; for( int i = data; i < data_length; ++i ){ char const. toString(number); The code is equivalent to:. In the preceding example, 52 is a magic number. How to: Convert an Array of Bytes into a String in Visual Basic. I wanna convert it into a byte array. I found the function BinToHex, but it seams not to work with a array of byte or a byte only with PChar. Pointer to the destination array where the content is to be copied, type-casted to a pointer of type void*. Encoding utf_8 = System. The JavaScript source code is simple: If so, the cutHex () function cuts off the # so that only the hexadecimal digits are left in the input value. Enter ASCII text or hex/binary/decimal numbers:. While doing that I want to add delimiters as Hex "02" and Hex "03" Adding Hexadecimal to byte array (Java in General forum at Coderanch). com/129 위의 hexString to byte 같은 경우 음수가 들어오면 변환은 내가 대충 짜본것이다. This example uses the GetString method of the Encoding. I'm not sure what you mean by "bytes that I got by converting a string". In simple word, byte values are numeric values and character encoding is map which provides a character for a particular. sh file to a. When you want to write this value out, you are not "converting Bytes to Bits", you are simply expressing the value. In this post we have shared two methods of converting an ArrayList to String array. ASCII was originally developed from telegraphic codes. 따라서 보낼 데이터는 바이트 형태로 인코딩을 하게된다. / bcprov / src / main / java / org / bouncycastle / util. Join GitHub today. T4Byte = array [0. Convert a byte[] array to readable string format. Converting a bitmap into a byte array is simple with built-in. A string is very much like a C or Java string. No difference whatsoever. Chilkat RSA Python Library Chilkat Python Module Downloads for Windows, Linux, and MAC OS X. Convenience method to convert a byte to a hex string. How to convert a byte array to a hex string in Java? Java 8 Object Oriented Programming Programming The printHexBinary() method of the DatatypeConverter class accepts a byte array and returns a hex string. Context context) Constructs a new Bluetooth® connection with the given macAddress and timeout values. Decimal is the base 10 ten number system and Binary is a base 2 number system (0s and 1s). source Pointer to the source of data to be copied, type-casted to a pointer of type const void*. Converting Byte Array to String and vice versa I am using the Android javax API to encrypt a string which returns a byte array which I again convert into String (purpose is to write to textfile later). All replies. decode(str, Base64. There's a much easier way to do it: to byte array - BigInteger. Is there a function to perform this? 15584/how-to-convert-a-byte-into-hexadecimal-in-java. To convert byte array to hex value, we loop through each byte in the array and use String 's format(). Feb 25, 2015 Core Java, Examples, Snippet, String comments. The idea is that i want any size string to put the corresponding hex value into a byte array. It is useful for seeing exactly what is in a file, byte-by-byte. Space: The space character in the example is encoded as the byte 32. Convert string to binary and binary to string in C# Posted on March 19, 2013 by CooLMinE 6 Comments The following two snippets allow you to convert a string to binary text and also to convert binary back to string. Much like C or C++, Java arrays are indexed numerically on a 0-based system. the hex value can be send by using serial write like example below. How to convert a bytes32 to string: pragma solidity ^0. 4 Ways to Convert String Array to Comma Separated String. Chilkat • HOME • Android Convert String to Byte Array Function. This name is used as the resource ID to reference the array. I have some e-mails that have raw instead of latin-1 characters for æ,Æ,ø,Ø,å,Å. length * 2]; int v; for (int j = 0; j < bytes. What I mean by frame-of-reference, is that your common reference point between the input string, and the output array, is the last character, and the last member of the byte[] array. But I want to be able to actually format the byte array so that each byte is displayed as HEX instead of decimal. Parsing and Formatting a Big Integer into Binary: 2. This site uses cookies for analytics, personalized content and ads. The following code examples are extracted from open source projects. Such a function is useful when you need to backup data from your application on paper, such as an. Jan 01, 2017 · i have a byte array its value taken from debugger 0 = -124 1 = 56 2 = 56 3 = 65 then convert to hex StringBuilder res1 = new StringBuilder(); for (byte b : Bytes) { res1. By converting your int to hex - you are unecessarily going to do string comparisons. This form allows you to generate random text strings. However, binary data cannot be represented directly in plain text, so one popular method is to convert binary to Base64 format. The contents are initialized to 0. How to convert Byte Array to BLOB in java? Java 8 Object Oriented Programming Programming You can convert a byte array to blob bypassing byte array to the constructor of the SerialBlob class. Rate this: This string should be converted to a byte array in androidlike 0x12 0x34 0x56 0x78 0xab 0xcd 0xef 0xgh. writes short ints to byte array: 33. You should line up your reference points, and work out from there. fill() method. Gson type adapter to serialize and deserialize byte arrays in base64 - GsonHelper. I wrote a program that converts a hex-encoded string to base64. # re: byte array to hex string in C++ Unfortunately the examples above are either written in non-standard C++ (MS only), or are just plain wrong and don't compile. Constructs a hex data dump of the given portion of bytes. That being said, what you would do in order to revert the byte array element(s) of your array list back into memory stream objects is match the type and create a memory stream from a byte array using the memory stream's overloaded constructor. If the string contains, say, 17 characters, then the String object itself still requires 24 bytes. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. how i'm gonna send hexadecimal value to serial devices. Line 9 : char타입의 포인터를 byte 타입으로 변환합니다. We often need to convert byte arrays to Hex String in Java, In order to print byte array contents in a readable format. Byte is an immutable value type that represents unsigned integers with values that range from 0 to 255. You can use a file pointer (of type long), similar to array index, to access individual byte or group of bytes in primitive types (such as int and double). Return Value destination is returned. Such a function is useful when you need to backup data from your application on paper, such as an. I'm trying to convert an image that is in a byte array to a bitmap, just for being able to show it. - patrickfav/bytes-java. How to convert a byte array to a hex string in Java? Java 8 Object Oriented Programming Programming The printHexBinary() method of the DatatypeConverter class accepts a byte array and returns a hex string. String to Hex: 9. For that you have to determine if you are scanning left to right or right to left. This is one of the simplest examples to demonstrate how to convert ByteBuffer to String. The key to convert byte array to String is character encoding. attributes: name String. parseInt(input, 16) method and cast it back to a char. Collections. 0 (Eclipse 3. DatatypeConverter already provides a method for encoding/decoding Base64 data. length()), substrings of str(str. But I want to be able to actually format the byte array so that each byte is displayed as HEX instead of decimal. When a string of hex digits is given, curly braces, hyphens, and a URN prefix are. Kotlin has two types of string literals. How to convert hexadecimal number to a string in android /** * @param hexString Hexadecimnal number * @return String Notation of the Hexadecimnal number * null if. Recall that strings are 8-bit arrays with a null-termination. I have a legacy method toHex(byte[]) used in my application since the beginning of time to store a hexadecimal representation of a byte[] into the database. String to Hex: 8. The following code block helps you to convert a byte array to hex string format. Base64 Decode is very unique tool to encode Base64 data. This class provides encoding of byte arrays into Base64-encoded strings, and decoding the other way. In C programming language, an unsigned char type can be used to declare byte array in C programming language. Convenience method to convert a byte array to a hex string. If control over byte order is needed, use DataView instead. mTransmission. It becomes really helpful in case you want to upload image to server or save the image in database. Parsing and Formatting a Byte Array into Binary: 2. The same method converts byte array to hex string −. Diagnostics; using System. This is a manual way of copying all the ArrayList elements to the String Array[]. DataWedge invokes an intent though an Intent action in an Intent category as described in its AndroidManifest. Encoding utf_8 = System. This application note. It complains if an input line contains an odd number of hexadecimal digits. @Sparr is right, but I guess you expected byte array like byte[] in C#. How to convert a byte array to a hex string in Java? into Android. HexEncoding. There's an easy one to go from a hex string to an int, but not from hex string to array of bytes: using System; using System. If you want to convert a byte array of ASCII characters into a string, you can use one of the String constructors: String string = new String(new byte[]{'A', 'B', 'C'}, "US-ASCII"); Just watch out for the checked UnsupportedEncodingException if your computer doesn't support ASCII (ack!). Bytes is a utility library that makes it easy to create, parse, transform, validate and convert byte arrays in Java. This article is part of the “Java – Back to Basic” series here on Baeldung. ASCII to Hex - Convert String to char array, I am doing byte dump of the ASCII and am seeing if it has the same hexa. The Byte class wraps a value of primitive type byte in an object. 2) The returned byte array is on specified character encoding 3) You can see that length of the byte array is not same as a number of characters in String as was the case in the previous example because UTF-16 encoding takes at-least 2 bytes to encode a character. (If you have a system which can only access 4 bytes of memory at a time, rather than one sole byte, then it would be efficient to store the byte value in the least significant byte of the 4 bytes, and to just ignore the values of the subsequent 3 bytes). want to return the String in hex instead of Byte. public static String loadFileAsString(String filename) throws java. A URL’s path is a list of zero or more ASCII strings holding data, usually identifying a location in hierarchical form. It might be possible that your byte array contain non-printable ASCII characters. 0 (Eclipse 3. Get Hex string out of byte array : Hex « Date Type « Android Get Hex string out of byte array : Hex « Date Type « Android. join('') } But I am not getting the right result. If you want to convert a byte array of ASCII characters into a string, you can use one of the String constructors: String string = new String(new byte[]{'A', 'B', 'C'}, "US-ASCII"); Just watch out for the checked UnsupportedEncodingException if your computer doesn't support ASCII (ack!). Data; using System. I wrote a program that converts a hex-encoded string to base64. 07/20/2015; 2 minutes to read +4; In this article. Line 9 : char타입의 포인터를 byte 타입으로 변환합니다. Convert string plus hexadecimals to array of hex: The size of hexadecimal is 2. I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array. I can get the WWN back but it is contained as an 8 byte array. AlarmClock; BlockedNumberContract; BlockedNumberContract. Color name and its hex value: 5. using System; public class Example { public static void Main() { // Create an Integer from a 4-byte array. substring()), and so on [6] 13. Strings won't work the same. toString(16) }). The following script converts hexadecimal to binary, ignoring any input character that isn't a hexadecimal digit. Java Program to Convert File to byte array and Vice-Versa In this program, you'll learn to convert a File object to byte[] and vice-versa in Java. Convert byte array to hex string in Java - CodeSpeedy. In this Java program, I have first created a String literal, then I have got the byte array from that String in UTF-8 encoding scheme. 4154119ea53 - Convert to and from UTF-8 without catching impossible exceptions. However for large byte arrays this method is slow. Takes an array of input strings (of which "2" is the correct number for this challenge) and prints their character values, including the trailing NUL. This is one of the simplest examples to demonstrate how to convert ByteBuffer to String. Now, we'll iterate through the array and convert each hexadecimal pair to a byte:. Suppose we want to store 4 bytes (U, N, I and X) as two shorts: UN and IX. That being said, what you would do in order to revert the byte array element(s) of your array list back into memory stream objects is match the type and create a memory stream from a byte array using the memory stream's overloaded constructor. For large byte arrays and where performance is important you can use the following utility method to convert each byte to its binary representation. Takes an array of input strings (of which "2" is the correct number for this challenge) and prints their character values, including the trailing NUL. For that you have to determine if you are scanning left to right or right to left. 4154119ea53 - Convert to and from UTF-8 without catching impossible exceptions. Does anyone know how to do this?. import java. In this example, ascii_str is an input string that contains "Hello world!", we are converting it to a BYTE array. We need to prepare hex string before could convert hex to a byte array and vice versa, and I noticed many forum create a small function to do the conversion from string to hex and convert a string to byte. ByteArrayOutputStream. You should not ask for 24 bytes if you use SHA1 for PBKDF2, it requires the entire number of rounds to be repeated. format("%x", byte)) to convert values to HEX values and display them on the console. How to convert a byte array to a hex string in Java? into Android. I don't think there's a reasonable (and reasonably fast) way to convert hexadecimal to binary using only POSIX tools. Base64 encoding and decoding. Get Hex string out of byte array: 7. 디버깅을 하기 위해서는 눈으로 값을 직접 봐야하니 Hex String으로 바꾸는 경우가 많습니다. Before we convert a file to byte array and vice-versa, we assume we have a file named test. Python: String in Byte-Array konvertieren Sagen, dass ich eine 4-Zeichen-string, und ich will wandeln Sie diesen string in ein byte-array, wobei jedes Zeichen in der Zeichenfolge ist übersetzt in seine hex-Entsprechung. ToString(Byte[], Int32) ToString(Byte[], Int32) ToString(Byte[], Int32) ToString(Byte[], Int32) Converts the numeric value of each element of a specified subarray of bytes to its equivalent hexadecimal string representation. Here's an alternate answer where I assume that you want a string of the actual bytes the pointer is pointing to. Based on the English alphabet, ASCII is a character-encoding scheme. Strings can be transformed to and from arrays of Bytes using specified encodings and to and from arrays of Chars. NET Framework is provides functionality to convert base datatypes to an array of bytes, and an array of bytes to base data types. I am trying to learn Regex, as such I have a String object which is a sequence of hex bytes: "0023C35B78CE"; Now I want to use the split method to explode this sequence into the format 00-23-C3-5B-78-CE I understand there are probably better alternatives, but I would rather use Regex because I want to run a test on this. I convert my byte[] to a string to send, I then expect my web service (written in python) to echo the data straight back to the client. Both Apache commons code and Spring provides, DigestUtils class with overloaded method md5() and md5Hex(), which can accept e ither String or by te array and can return either 16 element byte array or 32 characters Hex String. Below is an example that converts a string into a byte array. length() / 2]; Now, take a for loop until the length of the byte array. Codespeedy. source Pointer to the source of data to be copied, type-casted to a pointer of type const void*.