Convert a List of objects to a byte array in c#
In this case since you aren't only converting a struct, but an array of structs, you will need to loop through your array and convert each item. Use pointer arithmetic to move through your buffer and add the items. public static byte[] StructureArrayToByteArray(ChangedByte[] objs) { int structSize = Marshal.SizeOf(typeof(ChangedByte)); int...
Byte Array to Byte conversion error
c#,bit-manipulation,byte,bytearray,implicit-conversion
result is already a byte[], so do this instead: BitArray b = new BitArray(result); The part that's actually causing the problem is this: new byte[] { result } The reason for this is because the array initializer needs to take expressions that are compatible with the element type of the...
0x00 hex over TCP socket in QT
You are constructing a QByteArray from a string, but strings are terminated by the character 0. So your array is empty. Use a different constructor, i.e. const QByteArray sender(1, '\0'); ...
Android, When reading stored String byte array, it returns different byte array values
android,string,encryption,bytearray
Replace file with file1 at new BufferedWriter(new FileWriter(file1)); and new BufferedReader(new FileReader(file1)); try { String y = "Yyyyyyy"; byte[] a = y.getBytes(Charset.forName("UTF-8")); Log.e("TEXT", y); Log.e("BYTES FROM TEXT", Arrays.toString(a)); try { File file1 = new File("test.txt"); if (file1.createNewFile()) { String example = new String(a); BufferedWriter buffer = new BufferedWriter(new FileWriter(file1)); buffer.write(example);...
Trim/Truncate string to a maximum number of bytes
vb.net,string,byte,bytearray,truncate
Public Function FormatTitle(ByVal title As String) As String Dim byte() As Byte = Encoding.ASCII.GetBytes(title) If bytes.Length > 30 Then Dim dot As Byte = 46 'ascii value of "." bytes(27) = dot bytes(28) = dot bytes(29) = dot Array.Resize(bytes, 30) End If Return Encoding.ASCII.GetString(bytes) End Function ...
Read a byte array from a redirected process
c#,image-processing,process,bytearray
I think treating the output as a text stream is not the right thing to do here. Something like this worked for me, just directly read the data off the output pipe, it doesn't need conversion. var process = new Process(); process.StartInfo.FileName = @"C:\bin\ffmpeg.exe"; // take frame at 17 seconds...
How can I convert a string or multiple strings into different ranges within a byte array in Java?
java,string,char,buffer,bytearray
Try this, using System.arraycopy: // some dummy data byte[] myByteArr = new byte[1024]; String name = "name"; String userId = "userId"; int bufferPosition = 0; // repeat this for all of your fields... byte[] stringBytes = name.getBytes(); // get bytes from string System.arraycopy(stringBytes, 0, myByteArr, bufferPosition, stringBytes.length); // copy src...
Sorting byte arrays in numeric order
java,sorting,bytearray,comparator,leveldb
I believe that this is a correct, if not especially optimized, solution. The most obvious optimization would be to avoid the array copying. /** * Compares byte arrays numerically. The byte arrays must contain the * UTF-8 encodings of the string representations of numeric values. * The values can be...
Byte Array Substring
You can Use Buffer.BlockCopy Byte[] fileBytes = new Byte[bytes.Length - 16]; Buffer.BlockCopy(bytes, 16, fileBytes, 0, fileBytes.Length); BTW Guid is normally 16 bytes length, 38 is string length...
Memory Stream Byte Array vs ImageConverter Byte Array
Based on the MSDN documentation found here, the ImageConverter function is converting the internal .NET representation of the image object reference to a byte array rather than the image data it contains.
convert base64 Image to Sql Blob in JAVA
This is my working solution for my question : I had to convert my Base64 String Image to a byte[] : public static byte[] Base64ToBytes(String imageString) throws IOException { BASE64Decoder decoder = new BASE64Decoder(); byte[] decodedBytes = decoder.decodeBuffer(imageString); return decodedBytes; } Hope this will help someone else ....
somebody can explain to me the behaviour of my code?
hi i simply added a new instantiation wrapper=new byte[1024]; after myfile.add(index,wrapper); it seems to be some pointer issues. now my code is working perfectly. ...
Determine Facility Code and Card Number from ATR in C#
c#,.net,bytearray,smartcard,winscard
I'm not sure what the full-length number 3B050002F10673 is but, per the spec, you're only interested in the right-most 26 bits of it. Int64 start = 0x3B050002F10673; Int64 a_26_only = start & 0x3FFFFFF; //26 bits, 11 1111 1111 1111 1111 1111 1111 Then, per the spec, the right-most bit is...
java.io.StreamCorruptedException: invalid stream header: 48656C6C
java,bytearray,netty,objectinputstream
ppBytes must hold an Object representation in bytes. See below a short example. byte[] buffer; try (ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(bos)) { oos.writeObject("Hello World"); buffer = bos.toByteArray(); for (int i : buffer) { System.out.printf("%02X ", i & 0xFF); } System.out.println(""); } try (ByteArrayInputStream bis =...
Creating base64 encoded JPG string from image from camera for upload
android,image,paperclip,bytearray,jpeg
On button click for capturing an image from a camera use this Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg"); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f)); ((Activity) context).startActivityForResult(intent, Constants.REQUEST_IMAGE_CAPTURE); and on activityResult of the activity implement the following code: protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode,...
how do I set an Image which is Received in a Json Object thorough a web service as a response below…?
android,json,imageview,http-post,bytearray
The Answer For My Question... image_file=jsonObject.getString("IMGFILE1"); Gson gson = new Gson(); Type collectionType = new TypeToken<byte[]>(){}.getType(); byte[] parsed = gson.fromJson(image_file, collectionType); bmp1 = BitmapFactory.decodeByteArray(parsed, 0, parsed.length); I was able to do that by downloading the GSON library to execute this issue......
Python-like Byte Array String representation in C#
Well, if you're certain of the logic of the encoding, then you can just implement it: foreach (byte b in ba) { if (b >= 32 && b <= 126) { hex.Append((char) b); continue; } ... If you're looking for performance though, you should check out this answer, and possibly...
In Perl, how can I convert an array of bytes to a Unicode string?
Of course, it is possible. If you have the byte array my @bytes = (0xce, 0xb1, 0xce, 0xb2, 0xce, 0xb3); you need to first combine those into a string of octets: my $x = join '', map chr, @bytes; Then, you can use utf8::decode to convert that to UTF-8 in...
Image to ByteArray to BLOB and BLOB to ByteArray to Image Conversion Issues in Java
java,image,bytearray,blob,ucanaccess
Firstly, you should separate this into two parts: Storing binary data in a database and retrieving it Loading an image file and saving it again There's no need to use a database to test the second part - you should diagnose the issues by loading the image and saving straight...
Netica error or compression error? “buffer to decompress gzip 'internal' is too small”
java,bytearray,gzip,bytearrayinputstream
I have determined the issue. I mentioned that I read in a bayes net prior and that code looks like this: ByteArrayOutputStream baos = new ByteArrayOutputStream(); Streamer stream = new Streamer( baos, "myNetaFile.neta", env ); net.write( stream ); byte[] bytesToEncode = baos.toByteArray(); stream.flush(); String encoded = Base64.encodeBase64String( bytesToEncode ); The...
How to incrementally iterate through all possible values of a byte array of size n.
In case you don't realize: 16 bytes is the size of a Guid or the size of a standard cryptographic key size. There are so many combinations that you cannot enumerate even a fraction. Maybe you can enumerate the last 8 bytes if you parallelize across 1000 machines and wait...
how to send extra data in sinch payload
android,push-notification,bytearray,sinch
You can pass along extra data to your server however you like. Then, when making the request to GCM, it will look something like this: gcm.send(registration_id, options) Options is a JSON of whatever extra data you want to pass along. Example from Android docs: { "registration_id" : "APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx...", "data" :...
How to convert decimal string value to hex byte array in C#?
If you have no particular limit to the size of your integer, you could use BigInteger to do this conversion: var b = BigInteger.Parse("12345678"); var bb = b.ToByteArray(); foreach (var s in bb) { Console.Write("{0:x} ", s); } This prints 4e 61 bc 0 If the order of bytes matters,...
Convert Bitmap from array of bytes (byte[]) - Bitmap is still null
android,bitmap,jni,bytearray,decode
The problem is in your Java code: Bitmap grayScaledPic = BitmapFactory.decodeByteArray(grayBuffer, 0, grayBuffer.length); BitmapFactor.decodeByteArray() decodes a compressed image such as a JPG or PNG file that has been loaded into a byte array. It doesn't work on raw uncompressed data. To set from a grey scale byte array you would...
C# How to extract bytes from byte array? With known starting byte
byte[] results = new byte[16]; int index = Array.IndexOf(readBuffer, (byte)0x55); Array.Copy(readBuffer, index, results, 0, 16); Thank you all. This is my code now. it's working as I expect :)...
byte array to string and inverse : recoverded byte array is NOT match to original byte array in Java
You cannot convert an arbitrary sequence of bytes to String and expect the reverse conversion to work. You will need to use an encoding like Base64 to preserve an arbitrary sequence of bytes. (This is available from several places -- built into Java 8, and also available from Guava and...
python convert bytearray to numbers in list
Indexing a bytearray results in unsigned bytes. >>> pt[0] 50 >>> pt[5] 90 ...
How to convert boolean array to byte array
You could try something like this: private static byte boolsToByte(final boolean[] array, final int start) { byte b = 0; for (int i = 0; i < 8; i++) { if (array[start + i]) b |= 1 << (7 - i); } return b; } public static byte[] convertBoolArrayToByteArray(boolean[] boolArr)...
How to convert byte array to image in php?
php,image,image-processing,bytearray
Use pack to convert data into binary string, es: $data = implode('', array_map(function($e) { return pack("C*", $e); }, $MemberImage)); // header here // ... // body echo $data; ...
byte array[] to byte is it possible in java?
I think you mean bits, not bytes. String bitstr = "00000011"; byte convbyte = Byte.parseByte(bitstr, 2); The , 2 tells it that you're parsing a binary (base 2) string; the default would be decimal (base 10)....
Opening a file in Python: bytes array converted to string?
Was able to solve this by writing directly to a file. So rather than using 'print(data)', and redirecting to a file, I tried this: file = open("rawData", "wb") ... file.write(data) ... file.close() Was able to process "rawData" as expected....
Generate 100 random numbers between 14-24 in java and place in byte array
java,random,bytearray,generator
You can use the Random class. Generate a random number between 0 and 10 and add 14 to it. Random randomGenerator = new Random(); int randomInt = randomGenerator.nextInt(11) + 14; ...
overriding findResource
java,resources,bytearray,classloader
In the past, I've attached a custom URLStreamHandler to the URL during construction. For example: public class MyClassLoader extends ClassLoader { final byte[] myByteArray = new byte[] {0x1, 0x2, 0x3}; protected URL findResource(String name) { URL res = super.findResource(name); if (res != null) { res = new URL("my-bytes:" + name,...
Picture (JPEG, PNG) from raw byte array in Linux/OpenCV
This can be done with the cv::Mat constructor, and then reshape it using the number of rows. // data is your byte* and sizeOfData is its size in bytes (80x60 in your case I believe) cv::Mat imageWithData = cv::Mat(sizeOfData, 1, CV_8U, data).clone(); Mat reshapedImage = imageWithData.reshape(0, numberOfRows); ...
How can I convert bytes received in an AWS error message into something readable in Javascript?
javascript,amazon-web-services,amazon-s3,byte,bytearray
Try this var s = "41 57 53 34 2d 48 4d 41 43 2d 53 48 41 32 35 36 0a 32 30 31 35 30 34 32 35 54 31 36 32 33 30 36 5a 0a 32 30 31 35 30 34 32 35 2f 65 75...
Java byteArray equivalent in JavaScript
java,javascript,node.js,byte,bytearray
If I correctly understand your question, you can use Buffer to get file contents, then read the bytes from it into your array. Java byte type is a signed 8-bit integer, the equivalent in Node.js Buffer is buf.readInt8(). So you can read the required amount of bytes from Buffer into...
What's the Pythonian way to append to a bytearray a list?
You can extend, you don't need to iterate over payload: final_payload.extend(payload) Not sure you want final_payload.append(len(payload)) either....
Javascript (MVC) load image (byte array) from database
javascript,ajax,image,bytearray,src
After a lot of playing, a good night's sleep and a bit of luck, here is the solution. I needed to add a string property to my model, call it "ImageBytesAsString" and set the src to that in my ajax response. Here is the code.. MODEL: public byte[] Image {...
Converting InkCanvas Strokes to a Byte Array and back again
c#,wpf,bytearray,converter,inkcanvas
My problem was that I didn't serialize the output to the saved file and thus the when I loaded that file deserializing it tripped an error. Here is the correct code: private void SaveByteArrayToFile(byte[] byteArray) { var dialog = new System.Windows.Forms.FolderBrowserDialog(); string filepath = ""; if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) {...
bytearray.fromhex doesn't convert when no letters in number
python,python-2.7,hex,bytearray
You should not decode the string from hex; drop the .decode('hex') call. You need to pass in actual hex digits, not a bytestring with codepoints based on those digits. Compare the difference: >>> hex(1094795584)[2:] '41414140' >>> hex(1094795584)[2:].decode('hex') '[email protected]' By decoding you are already producing the very bytes you wanted bytesarray.fromhex()...
How to save and retrieve image in a web database thru JSON in ANDROID
android,json,database,bitmap,bytearray
I had a quite similar issue in this post that I did a couple of days ago and the recommendation they gave me was to use a networking library like Google Volley to make my requests more easier and it's way less work. Also, here is a link for a...
What is the best way to create byte data structure not fixed size in JAVA
java,data-structures,bytearray
You can implement this with an ArrayList under the hood. ArrayList is an array that expands when more data is added than capacity permits. Your ByteCache might look like public class ByteCache { ArrayList<Byte> backing = new ArrayList<Byte>(); public ByteCache(){ } public ByteCache(Byte[] bytes){ add(bytes); } public void add(Byte[] bytes){...
How to get the byte[] used to construct a String?
java,string,character-encoding,bytearray
In general, you can't. Not all byte sequences are valid UTF-8. Therefore data might be corrupted in the (error-tolerant) byte[]->char[]->byte[] process. You could use ISO_8859_1 encoding though, it is a one-to-one mapping for byte<->char This is not an uncommon problem. Many aged protocols, like HTTP, were started with ISO_8859_1 chars...
Why i cannot show my byte[] image after converting it from bitmap?
java,android,bitmap,bytearray,scale
This was working for me public static Bitmap byteArraytoBitmap(byte[] bytes) { return (BitmapFactory.decodeByteArray(bytes, 0, bytes.length)); } public static byte[] bitmaptoByteArray(Bitmap bmp) { ByteArrayOutputStream stream = new ByteArrayOutputStream(); bmp.compress(Bitmap.CompressFormat.PNG, 100, stream); //PNG format is lossless and will ignore the quality setting! byte[] byteArray = stream.toByteArray(); return byteArray; } public static Bitmap...
Python3 How to make a bytes object from a list of integers
python,python-3.x,byte,bytearray
Just call the bytes constructor. As the docs say: … constructor arguments are interpreted as for bytearray(). And if you follow that link: If it is an iterable, it must be an iterable of integers in the range 0 <= x < 256, which are used as the initial contents...
Writing a byte array to a bmp java
BMP has a file structure. Here, you are writing to a file named "encrypted.bmp", so I suppose your bytes are the encryption of something, and thus do not represent a valid bmp file. You will have to comply to the BMP file structure, adding a header and footer so that...
how to convert byte array to Japanese character
java,arrays,string,bytearray,inputstream
To convert a byte array to a String, you should use the String(byte[] bytes, Charset charset) constructor. To properly decode the bytes into a sequence of characters, you have to know the character encoding in which to interpret the bytes. The most common is UTF-8. Example: // Bytes of UTF-8...
change between string and bytes in python3
python,string,python-3.x,unicode,bytearray
In Python 3.x, use str.encode (str -> bytes) and bytes.decode (bytes -> str) with latin1 encoding (or iso-8859-1): >>> x1 = '\xba\xba' >>> x2 = b'\xba\xba' >>> x1.encode('latin1') == x2 True >>> x2.decode('latin1') == x1 True ...
How to improve speed with Receipt printer and ESC/POS commands in Java
java,byte,bytearray,thermal-printer,receipt
I have no idea if this will improve your printing speed, but in answer to your question about reducing the number of "print jobs", you could write all the bytes to a stream first, then send the whole stream to a single print job. I've attempted to convert your code...
Python3 Appending Null bytes with bytearray()
data_pad = ("00000000") file_pad = binascii.unhexlify(data_pad) with open(pack, 'ab') as file_con_pad: file_con_pad.write(file_pad) print ('4 bit padding added') Ended up using this, thanks for all the help and the downvote, such a helpfull community....
Generate xls-file from HSSFWorkbook
excel,file,export,apache-poi,bytearray
From the Apache POI javadocs for HSSFWorkbook.getBytes(): public byte[] getBytes() Method getBytes - get the bytes of just the HSSF portions of the XLS file. Use this to construct a POI POIFSFileSystem yourself. Excel .xls files must be wrapped in an outer OLE2 container, eg as generated by POIFSFileSystem. As...
Storing Byte Array inside an Object, and then converting it to ObjectOutputStream? (Stuck)
java,bytearray,objectoutputstream
Here I've added read/writeObject methods: class FileDetails implements Serializable { private static final int CHUNK_LEN = 0x10000; // 64k private String fileName; private long fileSize; private File file; // Note: everything can be deduced from a File object public FileDetails(File file) { this.fileName = file.getName(); this.fileSize = file.length(); this.file =...
remove UTF-8 char from end of a byte array
From http://en.wikipedia.org/wiki/UTF-8#Description , you could find that the beginning byte of each UTF-8 character is either 0xxxxxxx or 11xxxxxx. That is, the beginning byte is never 10xxxxxx. Thus, assume bytearray is of type char* or char[], then you could write for (counter = strlen(bytearray)-1; counter >= 0; --counter) { if...
Play Base64 encoded audio file in java [duplicate]
java,audio,base64,bytearray,encode
The answers to all of your questions are in the documentation. First, let's look at the documentation for AudioSystem. There are five getAudioInputStream methods. Two take explicit AudioFormat arguments, which don't apply to playing a .wav file. The remaining three methods take a File, InputStream and URL, respectively. Since you...
Python 3 Struct unpack int and bytearray
python,python-3.x,struct,bytearray
You could just slice the array: timestamp, base64_data = ba_object[:4], ba_object[4:] The timestamp could be extracted with the int.from_bytes() class method, while the base64-encoded data can be handled with base64.b64decode(): import base64 timestamp = int.from_bytes(ba_object[:4], byteorder='big') data = base64.b64decode(ba_object[4:]) ...
unable to convert uploaded image to byte array
c#,bytearray,binaryreader,httppostedfilebase
Use the convert method as mentioned below: public byte[] ConvertToBytes(HttpPostedFileBase image) { return image.InputStream.StreamToByteArray(); } public static byte[] StreamToByteArray(this Stream input) { input.Position = 0; using (var ms = new MemoryStream()) { int length = System.Convert.ToInt32(input.Length); input.CopyTo(ms, length); return ms.ToArray(); } } ...
Save image on disk from byte array (using EF), A generic error occurred in GDI+
You don't need to do any of that. Your bytes are already a JPEG file; you can read and write them from disk using File.ReadAllBytes() and File.WriteAllBytes().
Optimize byte array simple pattern matching
java,pattern-matching,bytearray
Yes, it can be simplified/optimized: You could use the KMP algorithm (first 14 bytes). This algorithm runs in O(payload.length + virus.length) for arbitrary payload instead of O(payload.length * virus.length). (Your code is working more efficiently than O(payload.length * virus.length) for only one reason: 0x56 occurs only as the first element...
attach timestamp to jpg bytearray
You can send a jpg file and then add 8 bytes to encode the long timestamp, then another jpg and 8 bytes of timestam, and so on. You can detect the end of the jpeg, using what it is commented here Detect Eof for JPG images...
Converting View to Byte Array to Print
java,android,printing,bytearray
I ended up using an ArrayList for each line item to print. It is a receipt so there's no special formatted. For example: list.add(("Ticket NO: " + data.get("ticketNo") + "\n").getBytes()); I then sent the entire list to the printer SDK command to print. Trying to print what the user sees...
Recombining several DatagramPackets into a single byte[]
Your idea is not bad. Many protocols use it. You can either give enough bytes to allow for worst case scenarios. For example: idOfPacket: 16 bytes (128 bits) positionOfPacket: 4 bytes (4294967296) numberOfPackets: 4 bytes (4294967296) Or what you can do is have a byte (or bytes) (lets call it...
Handle windows-1252 and unicode in java [closed]
java,unicode,utf-8,character-encoding,bytearray
It seems that your server confuses the ISO-Latin-1 encoding with the proprietary Windows-1252 code page and the encoded data are the result of this. The Windows-1252 code page differs only at a few places from ISO-Latin-1. You can fix the data by converting them back to the bytes the server...
Show image as byte[] from database as graphic image in JSF page
This is not directly possible with <h:graphicImage>. It can only point to an URL, not to a byte[] nor InputStream. Basically, you need to make sure that those bytes are directly available as a HTTP response on the given URL, which you can then use in <h:graphicImage> (or even plain...
How can I concatenate two bytes in java?
java,type-conversion,byte,bytearray,bucket
This would be covered high-level by a ByteBuffer. short loc = (short) writeLocation; byte[] bucket = ... int idex = bucket.length - 2; ByteBuffer buf = ByteBuffer.wrap(bucket); buf.order(ByteOrder.LITTLE__ENDIAN); // Optional buf.putShort(index, loc); writeLocation = buf.getShort(index); The order can be specified, or left to the default (BIG_ENDIAN). The ByteBuffer wraps the...
Byte array to struct
The problem is at this line: byte[] stringBytes = GetBytes(text); How are you converting the string to a byte array? You are probably using a Unicode encoding, which will store each character as two bytes, and because your string is in the ASCII set, every other byte will be zero:...
BLE Device Name irretrievable
android,bytearray,bluetooth-lowenergy,android-bluetooth
See this answer for a breakdown of an iBeacon advertisement packet. There is no name. The official spec is only available via Apple's MFi program....
Add ByteArray to integer
java,bytearray,bytebuffer,data-stream
It's not adding the whole byte array, it's just adding the byte at position 43. (i.e. the 44th byte in the array).
How to read a response from a web service that returns a byte[]
Like suggested Gabor above, I'll just use byte[].class Thanks!
how to pass a struct pointer from from c# to win32 DLL
I solved it by change value field to pointer c++ typedef struct { int length; unsigned char* value; } wavfile; extern "C" __declspec(dllexport) int insert_In_Table(wavfile *w) { hashing HS( w->value , (unsigned int)w->length); return HS.insertIn_hashTable(); } c# [DllImport("C:\\...\\HashCplusDll.dll", CallingConvention= CallingConvention.Cdecl)] public static extern int insert_In_Table(ref Wavfile sample); public static int...
How to convert an ArrayList of byte[] to an array of Integer in Android?
java,android,arraylist,integer,bytearray
Decode back to Bitmap ArrayList<Bitmap> imgs = new ArrayList<Bitmap>(); for(byte[] array: listByte) { Bitmap bm = BitmapFactory.decodeByteArray(array, 0, array.length); //use android built-in functions imgs.add(bm); } ...
Java socket receives byte array where each byte is 0
Mixing binary and text modes on the same stream is tricky. You would be advised not to do it. Using DataInputStream (for the name, count and file content) is one possible solution. (And that is what I would try). Another would be to encode the file content as text (e.g....
Takes 25+ Seconds To Save Bitmap From Camera To Phone
java,android,bitmap,camera,bytearray
Can you advise why my code is so slow Perhaps among other reasons, you are writing the image to a file, re-reading the same image from the file, doing the transform, then writing the image back out to a file. That is going to take a lot of time....
Python/C#, Reading File into Byte Array - Not Quite the Same Result
(I don't know python) But it looks like you need to pass the 'rb' flag: open('C:\myfile.blah', 'rb') Reference: On Windows, 'b' appended to the mode opens the file in binary mode, so there are also modes like 'rb', 'wb', and 'r+b'. Python on Windows makes a distinction between text and...
Skip bytes in ByteArray Java
Have you tried to use ByteArrayInputStream http://docs.oracle.com/javase/7/docs/api/java/io/ByteArrayInputStream.html? there is skip method
Convert ByteBuffer to byte array java
java,arrays,bytearray,bytebuffer
ByteBuffer exposes the bulk get(byte[]) method which transfers bytes from the buffer into the array. You'll need to instantiate an array of length equal to the number of remaining bytes in the buffer. ByteBuffer buf = ... byte[] arr = new byte[buf.remaining()]; buf.get(arr); ...
Forcing Unicode in byte variable
java,string,unicode,byte,bytearray
For Unicode characters, you can specify the encoding in the call to getBytes: byte arr[] = S.getBytes("UTF8"); As far as why you are getting 63 as a result, the call to getBytes without a parameter uses your platform's default encoding. The character \u9999 cannot be properly represented in your default...
circular bit shifting in byte array in java
Here's one (not very elegant) way: byte[] bytes = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe}; // now shift left byte b0 = bytes[0]; System.arraycopy(bytes, 1, bytes, 0, bytes.length -1); bytes[bytes.length - 1] = b0; ...
Get subarray of byte
Easy perfomance test: public void Test() { const int MAX = 1000000; byte[] arrByte1 = { 11, 22, 33, 44, 55, 66 }; byte[] arrByte2 = new byte[2]; Stopwatch sw = new Stopwatch(); // Array.Copy sw.Start(); for (int i = 0; i < MAX; i++) { Array.Copy(arrByte1, 2, arrByte2, 0,...
Writing ByteArray to file in c
Replace fwrite(&byteArray.bytes, 1, byteArray.length, fileToWrite); with fwrite(byteArray.bytes, 1, byteArray.length, fileToWrite); And as pointed out by @Sourav Ghosh make sure that byteArray.bytes is pointing to the correct source location....
Convert raw pixel data (as byte array) to BufferedImage
java,bytearray,bufferedimage,imagefilter
Use the RawImageInputStream from jai. This does require knowing information about the SampleModel, which you appear to have from the native code. Another option would be to put your rawBytes into a DataBuffer, then create a WritableRaster, and finally create a BufferedImage. This is essentially what the RawImageInputStream would do....
Android: byte array to decimal string
java,android,type-conversion,bytearray
This will print out the byte array as decimals, with leading zeros (as your hex output does) and a space after each number: final protected static char[] decimalArray = "0123456789".toCharArray(); public static String bytesToDecimal(byte[] bytes) { char[] decimalChars = new char[bytes.length * 4]; for ( int j = 0; j...
How do you save a Byte array in SQL?
Here is an example that inserts, updates, and selects the data back: DECLARE @TableName TABLE ( [Cell] INT, [Image] VARBINARY(MAX) ) INSERT INTO @TableName VALUES (1, CONVERT(VARBINARY(MAX), 'Test')) UPDATE @TableName SET [Image] = (CONVERT(VARBINARY(MAX), 'lengthy string with over 1000 hard returned lines')) WHERE [Cell] = 1 SELECT [Image] FROM @TableName...
xxHash convert resulting in hash too long
When you construct your xxHash object, you need to supply a hashsize: var hasher = new xxHash(32); valid hash sizes are 32 and 64. See https://github.com/brandondahler/Data.HashFunction/blob/master/src/xxHash/xxHash.cs for the source....
cast a stream or byte array to object
c#,unity3d,stream,bytearray,deserialization
The semantics of a Memory Stream work just the same as the File Stream. The examples you have should work the same way with the memory stream replacing the file stream. You can also do this in unsafe code, but that seems overkill for what you trying to do here....
Get half bytes from a byte
byte[] data = "nibbles".getBytes(StandardCharsets.US_ASCII); for(byte b : data) { int high = (b & 0xf0) >> 4; int low = b & 0xf; System.out.format("%x%n", high); System.out.format("%x%n", low); } ...
Remove 0-byte (UTF-8) characters in String
java,string,utf-8,network-programming,bytearray
As all of your zeros appear at the end of the string you can solve this even without regular expresions: static String trimZeros(String str) { int pos = str.indexOf(0); return pos == -1 ? str : str.substring(0, pos); } usernameString = trimZeros(usernameString); passwordString = trimZeros(passwordString); ...
How to find out total number of bytes stored in ByteBuffer?
java,byte,bytearray,bytebuffer
When using ByteBuffer there is a difference between putting and getting values from the buffer. When bytes are put on the buffer they get added at the current position. If the limit is reached then the buffer is full. So position() shows the amount of data in the buffer and...
Arrays better for serialization than Vectors
arrays,actionscript-3,serialization,vector,bytearray
According to AMF 3 specification AMF stores arrays as a separate, optimized for dense arrays manner, and also stores ints in an optimized manner to minimize the number of bytes used for small ints. This way, your array of values 0-99 gets stored as: 00000000 0x09 ; array marker 00000001...
Reading 4 bytes of data as a Long with Python 2
python-2.7,bytearray,long-integer
import struct struct.unpack('>l', ''.join(ss)) I chose to interpret it as big-endian, you need to decide that yourself and use < instead if your data is little-endian. If possible, use unpack_from() to read the data directly from your file, instead of using an intermediate list-of-single-char-strings....
Byte conversion back to Image
vb.net,type-conversion,byte,bytearray
As said in my comment from above, your not casting your property in the memory stream you have created. Also if plr.PlayerImage is not defined as Byte() you will get an exception. Here's what it may look like... Public Property PlayerImage As Byte() Here's what you currently have... Dim ms...
java MD5 encryption minus value in byte array
java,encryption,bytearray,md5,message-digest
This is because the byte type in Java (like almost all other types) is signed, which means it has a range of -128..127. If you want to convert this range to an unsigned range (0..255), do this: byte b = -2; int i = b & 0xff; Print your result...