Save obj as a byte array?

Similar Questions

• How to convert a string to byte array

  Hello

  I want to convert a string with a hexadecimal number in the array of bytes, this string includes a cutting-edge information, but I don't want to add this tip to arry bytes.

  detailed information please see the photo. I hope someone can give me some instructions, thank you very much.

  

  The accepted solution of Giedrius.S is not correct, based on the image shown in the first post. That the solution will not eliminate the spaces before the tip, and the string to byte array to convert individual characters '0', '8', 'space', '9', etc. for them to byte values. The right solution, based on the image below:

  

• Numbers of string to byte array

  I try to use "Byte array to string" if I display the byte array, I can see the last two items are the numbers 4-8 (ASCII 52 56) but when I use the "Byte Array to necklace" and add an indicator of the 48 is missing?  Ignore this palette number 0-9?  Is there another way to easily convert an array of bytes into a string with numbers.  What I am doing wrong?

  I'm looking, but I can't believe I can't find an example of this?

  
  

• BYTE array to float?

  I am relatively new to Labview and haven't found an example of this on these forums.  Any help would be greatly appreciated!

  I read in a stream of characters from a series device, and I would like to convert a 4-byte string (or Byte array) to a float value.  Is there a way to do this in labview?

  For example, I have the table {0x4b, 0x1c, 0 x 90, 0x42} = 0x4b1c9042 = 72.055260 float value

  I can do this in c by:

  Char [] floatarray is {0x4b, 0x1c, 0 x 90, 0x42, 0x00};.

  memcpy (floatarray, & floatvalue sends);

  printf ("float \nMy value is %f", floatvalue);  give 72.055260 for floatvalue

  Is there a way to do this in Labview?

  Note that if you get the chain in that order, you need to invert the first string:

  

• Convert Int to byte array.

  Hello

  I am trying to convert an int to an array of bytes and stumbled upon a solution. However, it is not appropriate for BB/J2ME.

  byte[] bytes = ByteBuffer.allocate(4).putInt(1695609641).array();
  
  for (byte b : bytes) {
     System.out.format("0x%x ", b);
  }
  

  I have converted into loop, but not an alternative to System.out.format () there is no J2ME.

  How can I convert my whole in byte array?

  Thank you.

  Hi guys, sorry for the delay in responding. Basically, I have to send my ACR122U an int on NFC. If int is more than 255 does not in a single byte then I have to represent in an array of bytes, right?

  I think RexDoug is correct also, I don't understand masking and stuff like that. It's something that I've always been conscious of good :/

  Thank you guys.

  Here's what I went with:

    public byte[] intToBytes(int value) {
  
           return new byte[] {
                      (byte) ((value >>> 24) & 0xff),
                      (byte) ((value >>> 16) & 0xff),
                      (byte) ((value >>> 8) & 0xff),
                      (byte) (value & 0xff),
                    };
      }
  

  REF: http://stackoverflow.com/questions/9587605/java-integer-to-byte-array-blackberry-j2me/9587708#958770...

• several images capture and read their path to send the byte array to the web service

  Hello

  Have a problem when the image capture, the requirement is to open the camera and capture multiple images, and once done it should send the array of bytes to the web service, wrote the class with reader and Video Control of the code and then using the saved file to store image API, but when the user capture multiple images it replaces previous if I keep the path to say dynamic by using the date and time then how I just know what images are recently captured and their path, one time I know that the path of recently captured using new fileconnection images can read the image byte array.

  Hi Nishant,

  find the attached code. In this demo, you will find:

  (1) the use of the listner log file system

  (2) how to move data from one folder to another.

  (3) how to read file system byteArray.

• Get a PNG of bitmap byte array

  Hey people. Look at the code below (continues after the code). (I use JDE 4.7 and tests on the simulator of Bold 9700 (OS 5.0)).

  
      private static Bitmap LoadBitmap(String uri) {
  
          InputStream in = null;
          FileConnection filecon = null;
          String exceptionText = null;
          byte[] bitmapBytes = new byte[1000000];
          boolean fileExists = false;
          int numBytes = 0;
  
          try {
              filecon = (FileConnection) Connector.open(uri, Connector.READ);    
  
              if (filecon.exists()) {
                  in = filecon.openInputStream();
                  numBytes = in.read(bitmapBytes, 0, 1000000);
                  in.close();
                  if (numBytes != 1)
                      fileExists = true;
              }
          }
          catch (Exception e) {
                      String logMessage = e.getMessage();
                      if ( EventLogger.logEvent( 0x4c9d3452d87922f2L, logMessage.getBytes(), EventLogger.ALWAYS_LOG ) ) {
                          System.out.println("Log Successful!");
                      }
          }
  
          Bitmap bm = null;
  
          if (fileExists) {
  
              String imageExtension = uri.substring(uri.length() - 4); // e.g. .png or .jpg or .gif
  
              if (imageExtension.equals(".png")) {
                  PNGEncodedImage image = (PNGEncodedImage)EncodedImage.createEncodedImage(bitmapBytes, 0, bitmapBytes.length);
                  bm = image.getBitmap();   // Chokes at present
              }
              else if (imageExtension.equals(".gif")) {
                  GIFEncodedImage image = (GIFEncodedImage)EncodedImage.createEncodedImage(bitmapBytes, 0, bitmapBytes.length);
                  bm = image.getBitmap();   // Chokes at present
              }
              else {
                  EncodedImage image = EncodedImage.createEncodedImage(bitmapBytes, 0, bitmapBytes.length);
                  bm = image.getBitmap();
              }
  
          }
  
          return bm;
  
      }
  

  Your code for reading from a file into a byte array has some problems. More important is the use of an InputStreamReader, which is to convert each byte in a character using the ISO-8859-1 default encoding. You are truncating each character for a byte and those writing in the file, which has probably garbage inside.

  Try this for the reading of the resource in a byte array:

  InputStream is = convertResourceToFile.getResourceAsStream("/" + resName);
  byte[] bytes = IOUtilities.streamToBytes(is);
  is.close();
  

  By reading the data back from the file, use a similar code. You should be aware that when you try to read a link like this:

  numBytes = in.read(bitmapBytes, 0, 1000000);
  

  There is no guarantee that the entrance is worn out from here that one call. It has guaranteed only that read() will consume at least one character, unless there is no more input. (I have no idea, however, why numBytes is greater than the size of the file. Have you verified that this is indeed the case - that the file is not that big?)

• Question about the RAF read byte array, method

  Hello
  
  I use file access random byte array read method to read a file. I will print each line, when printing to the last line, it is added with some null characters.
  
  Can you please suggest how to remove null characters in the last line?

  I use file access random byte array read method to read a file. I will print each line, when printing to the last line, it is added with some null characters.

  No, you're ignoring the read count returned by the method and the treatment of the whole buffer.

• Generate PrivateKey using byte array

  Hello
  
  I'm working on my school project, where I should simulate the DDA authentication. I placed my public and private keys inside byte [] variables in the applet, and in order to encrypt and decrypt messages I need to convert these arrays of bytes to the PublicKey and PrivateKey objects. I know that javacard.security defines a key factory class keyBuilder, but I can't understand how to use this class, to rebuild my keys, which are in the byte array. Is there a way to do this?
  
  Thank you
  Vuk

  hem. toString? a string? JavaCard know only 8 and 16-bit atomic types and tables. No int. No tank. No java.lang.String.

  How long have you studied javacard?

  the offcard entity will get the keys in arrays of bytes, put them in APDU, send the APDU to the javacard inside the map applet using javax.smartcardio. the javacard applet will then store the buffers received in key forums.

  I think you're mixing offcard code of java and applet javacard "at a distance". There is no magical conduit between java objects and plastic in a card; you need to send APDU commands to the cmdlet to store your keys inside the applet. This means developing a bunch of javacard code that will run in the map, using GlobalPlatform to download the code of the card.

  See here for pointers to base on the map technology.
  APDU and contactless

  Best regards and good luck.

• How to convert to unsigned int byte array?

  Greetings,
  
  I have no particular knowledge of Java programming, and I have a problem with a conversion.
  
  The exception thrown is "number Format Exception for the input string:"249"when I run the following code:
  
  ReadBytes = SocketInput.Read (bMessage);
  NetMessage = new String (bMessage);
  NetMessage = NetMessage.substring (0, readbytes);
  
  If (NetMessage.Equals ("NORES"))
  NetMessage = '0 '.
  
  int Res = 0;
  Try
  {
  RES = Byte.valueOf (NetMessage);
  }
  catch (NumberFormatException nfe)
  {
  AddMessage ("Number Format Exception" + nfe.getMessage () + "[" + bMessage.toString () + "]");
  }

  The java Byte / byte data type is signed and contains values from-128 to 127. Why not use Integer.valueOf () instead (which is not signed or said by the way) and look
  [url http://download.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html] in Java primitive data types.

  In your code example, there is no byte (byte []) array, while mention you in the subject...

• Sending the image byte array

  Hello friends

  Please guide me how can I send a table yte my UIcopmonent bitmap with the size of the 0.4 scale.

  In fact my my UIComponet size is 234 X 390 and I hv to send the byte array to the PHP end with size 90 X 150.

  This is so, how can I draw an image with the smallest size.please guide me almost 0.4 scale image.

  When I usedthis code

  var bmd:BitmapData = new BitmapData(cnvParent.width,cnvParent.height,true,0xffffff);
  var mt:Matrix new matrix());
  Mt.Scale (.4,.4);
  BMD. Draw (cnvParent, MT);
  var jpgencoder:PNGEncoder = new PNGEncoder();
  byteArray = jpgencoder.encode (bmd);

  It shows nothing after conversion to byte array. Please help me out of this problem, I have confused mtotally

  Thanks and greetings

  Vineet osho

  Hello

  If you acknowledged the answers when given to previous requests for help may call a friend people would sound more sincere. You where showed how scaling of images already was what process does not?

  David.

• "The String to Byte Array" and its operations on-site (memory) of twins "Byte Array to string"? (or if they incur sentence of copy/memory operation?)

  I can't deduct the answer to this question (topic/post title) of the help of LabVIEW on the functions.

  Intuitively, it seems that the two representations of data are equal to the memory and so goes between the two should essentially be a no-op when the code is compiled... but is it? (assuming that the length of the array of strings/remains constant, can I go back repeatedly without performance?)

  As a string of LabVIEW is a handful and any other type of data except tables aren't a handful; that implies to me that a string = U8-table-grip handle and so a string into an array of U8-could be a memory or inefficient operation since no conversion actually take place?

  The reason I ask, is that when you work with for example TCP Read or read VISA, 'data' reading is always a string, but according to what you are doing, this string is often more efficiently processed/interpreted if converted to an array of U8 and I just want to know if (memory and CPU point of view) I can move freely between the chain and U8 array and return depending on what format is most appropriate to a point?

  (Also, I'm at this stage fairly certain that the "array of strings of bytes" is cleaner AND more efficient than a type-cast to an array of U8 strin... but I could be wrong.)

  I did some tests on this just now, and my conclusion is that it is completely in place. The local users group had a coding challenge when this became relevant to my solution.

• Replace the byte array

  Hi all

  Please see my attached code, where I receive serial data, turn it into an array of bytes and you want to use a state machine in order to to treat.

  I wrote the data in a table, and it also displays via an indicator in the chain. So that the data on the screen, I used a feedback node. However, this means that the data are added each time it is sent (at intervals of 10 seconds). How can I get the data on the screen when sending and then be written when new data are received, both in the indicator and the table?

  Thank you

  Richard.

  
  

• How to save the text file input array

  Hello, I am very new to LabVIEW, so apologies if I use the wrong terminology.

  I did a VI which reads 25 text files from a 3D array.  When I click on run I need to select the files 25 text.  Is there a way I can save the data imported for later calculations without having to select the files each time?

  Here's what I have:

  

  Dan_Owen101 wrote:

  Thanks for that.  But the user will not have access to these files during execution of the VI.  There are many other paintings that I'll need to save and index for other variables as well, so just for that would use the method of you would be useful to know.  All I really need is a way to save these relatively few values in a table.

  So do you intend to have these values hard-coded into your executable?  This seems dangerous and likely to have you to make updates much.  Believe me when I say you want to have the sitting files with the executable.

  But if you're insistent on this, I would use a global variable.  Have a VI just read all files and build the table for you and write in the global variable.  Then you can right-click on the control on the Panel before global variable 'Create default value'.  Save the variable and build your executable file.

• Tips on creating a hexadecimal byte array

  I am communicating with a PLC by sending data series in the form of hexadecimal bytes commands. for example

  02 30 31 34 32 33 59 30 30 34 31 31 41 03

  I implemented the communication protocol and everything works fine. I send my orders and I get the right answer.

  the problem: I need to insert into my vi 3 x 55 = 165 at least these commands in this format. of course, I could copy - paste into a string variable and do my job. but I need to find a more practical way because they might change in the future. thought of creating a txt with the commads and then create 3 arrays of strings in my vi but I still need to send data HEX.

  I have my orders in almost any shape I want as I generate them in python.

  for example

  (HEX) 02 30 31 34 32 33 59 30 30 30 30 31 35 03 or

  2 48 49 52 50 51 89 48 48 48 48 49 53 3 (DEC) or

  0x02 0 x 30 0 x 31 0 x 34 0 x 32 0 x 33 x 0 59 0 x 30 0 30 x 0 x 30 0 x 30 0 x 31 0x35 0x03

  It works almost well, but converts me 02-> 0 to 30 and 2 to 32.

  

  and that's what I get (display as HEX in table properties). I just need the line of the txt string to be interpreted as a hexagon and build a table.

  

  any help will be appreciated. Thanks in advance.

  Your code is too complicated.  First of all, there is an option to right click on the file reading read the lines.  You can then autoindex on lines, elimination of one of your curls.  Second, you can do all the analysis and conversion of your row of data with just the string array spreadsheet function.