binary File « binary File « Java I/O Q&A

Home
Java I/O Q&A
1.API
2.batch File
3.binary File
4.class file
5.CSV file
6.deploy
7.Development
8.directory
9.error
10.Excel File
11.File Attribute
12.jar
13.Log
14.Media File
15.nio
16.Operation
17.PDF file
18.PropertyFile
19.serialize
20.text file
21.Windows
22.XML file
23.Zip
Java I/O Q&A » binary File » binary File 

1. Binary search in a sorted (memory-mapped ?) file in Java    stackoverflow.com

I am struggling to port a Perl program to Java, and learning Java as I go. A central component of the original program is a Perl module that does ...

2. Easiest way to compare two Excel files in Java?    stackoverflow.com

I'm writing a JUnit test for some code that produces an Excel file (which is binary). I have another Excel file that contains my expected output. What's the easiest way to ...

3. Searching for a sequence of Bytes in a Binary File with Java    stackoverflow.com

I have a sequence of bytes that I have to search for in a set of Binary files using Java. Example: I'm searching for the byte sequence DEADBEEF (in hex) in a ...

4. Storing a large binary file    stackoverflow.com

Are there any ways to store a large binary file like 50 MB in the ten files with 5 MB? thanks are there any special classes for doing this?

5. Java binary files writeUTF... explain specifications    stackoverflow.com

I'm studying Java on my own. One of the exercises is the following, however I do not really understand what it is asking to.... any smart java gurus out there that ...

6. Split and join back a binary file in java    stackoverflow.com

I am trying to divide a binary file (like video/audio/image) into chunks of 100kb each and then join those chunks back to get back the original file. My code seems to be ...

7. How to merge binary files using Java?    stackoverflow.com

I am downloading file parts using socket, saving them as .part1, .part2 etc.( However I am not sure if I should). I am trying to merge them in a .bin file. ...

8. Appending objects to a binary file    stackoverflow.com

Supose you have to following method:

public static void writeToBinary(Object obj, String filename) 
{
 ObjectOutputStream oos = null;
 try {
  oos = new ObjectOutputStream(new FileOutputStream(filename));
  oos.writeObject(obj);
 } catch (Exception e) ...

9. Binary files differ but not to JVM?    stackoverflow.com

I'm having an issue where org.apache.commons.io.FileUtils.copyFile(File, File) is producing slightly different files. When I compare these files with bsdiff or in an editor, I can tell they're different. Certain ...

10. Java & NNTP : How to post binary file?    stackoverflow.com

I asked Google several times without answer. So, I decide to ask you my question. How can I send (post) a binary file to a newsgroup server using Java ?

11. Java - overwrite portion of binary file    stackoverflow.com

I am trying to overwrite last 26 bytes of file. Basically i need to put a few integer and byte variables there. I'm trying to use a DataOutputStream together with FileOutputStream, ...

12. Hessian with large binary file    stackoverflow.com

how to create file Upload/Downlod servlet using Hessian binary protocol? for files larger than 1GB. I create test for Hessian with large binary data, but if file is ...

13. Overwriting binary value of file in java    stackoverflow.com

I'm involved in a project where we hide information in an mp3 file by modifying bytes at a specified position. I found code online which lets me write and read bytes ...

14. Checking if a character is an integer or letter    stackoverflow.com

I am modifying a file using Java. Here's what I want to accomplish:

  • if an & symbol, along with an integer, is detected while being read, I want to drop the ...

15. How to output binary data to a file in Java?    stackoverflow.com

I'm trying to write data to a file in binary format for compression. The data consists entirely of floating points so I decided to quantize the data to an intergers between ...

16. Binary files in java    stackoverflow.com

I Know that binary files connot be read by text editors, thay can be read only by programs. but when I create binary files using java(bytes), I can open files and read ...

17. Sorting Binary File Index Based    stackoverflow.com

I have a binary file which can be seen as a concatenation of different sub-file: INPUT FILE:

Hex Offset     ID          ...

18. Nasa binary files in Java    stackoverflow.com

I have file with binary data. This is specification:

The SRTM data files have names like "N34W119.hgt". What do the letters and numbers refer to, and what is ".hgt" ...

19. How to search and delete data from a Binary File created by my code?    stackoverflow.com

I'm having trouble with the remove function in this question. Would appreciate any help. Thanks! :D Q19 Define a class BIN which performs some basic operation on binary file. The class has the ...

20. Running a Binary file using Java in Ubuntu    stackoverflow.com

I am trying to run a binary file, which is Genia Sequence Splitter through java code. This Binary file is type x-executable and has no extension. I can run the file ...

21. Binary file    coderanch.com

22. How to create a binary file    coderanch.com

23. Character and Binary in one file    coderanch.com

Hello, I am wondering if it is possible to write character and binary data to the same file. I am working on a file that is to be uploaded to our mainframe and if I could put the numeric fields in binary along with the character date in the same file on the pc, it would save some processing on the ...

24. Binary Files ?    coderanch.com

Hi, i need some ideas with Binary Files.. I have an assignment to do based on binary files.. basically, A binary file stores customer id, name and current balance in ascending order of customer id. A program accepts transactions from a user to update customer records. Later enters customer id, program reads file for a record matching with the customer id. ...

25. Check if a file is binary    coderanch.com

26. How To Display a Binary file    coderanch.com

How can Read and display the contents of a binary file into a string as binary data. Ex: I have a file "abc" which has some encrypted data. { 46G0DG=P } Now I want to capture this data in a String variable say "str" as binary . which means when I use System.out.println(str) then I should get the original binary data ...

27. Reading/Writing a Binary file!    coderanch.com

I am trying to open some Word and Excel documents with my JSP. I was told that I can use Java's I/O methods for binary files (while paying attention to the MIME type) since I will simply be reading the files and then serving them to the user. There are so many read and write methods. Which methods are best for ...

28. binary file outputs to hex    coderanch.com

29. How to work with Binary Files?    coderanch.com

Hi, I am trying to make a program that can load Binary files and save Binary files, but I'm not sure on a couple of points. 1. I'm not sure which java classes to use to read in the binary file, and to save the binary file. 2. What file extension are binary files saved in? 3. What is the difference ...

30. binary file comparison    coderanch.com

The only certain way to compare two files is to compare them byte by byte. Since the checksums are a hash of the file contents there's a chance that vastly different files will generate the same checksum, so they are not particularly useful for proving equality. Checksums are useful for insuring that a file has not been tampered with when it ...

31. How to find a file is of binary type or not    coderanch.com

On the operating systems that I know of, binary-ness is not an attribute of the actual file. However, certain types of content are considered binary. To find out the content type of an arbitrary file, there are two main approaches: - Look at the file name - particularly the extension. A *.txt file is probably non-binary, while a *.zip file is ...

32. Binary Files    coderanch.com

Well if each record is of variable length it gets in need of some thought or something, but variable length traffic goes all over the place so several approaches should be within reach. Class File{ nested class fileHeader{ int number of records; int first record length; The problem already resembles a linked-list, which is known computer science. The tape archive has ...

33. Fast Access in Binary Files    coderanch.com

Hello everyone, I've never dealt with binary files at all, so I'm just looking for a place to get started (and to find out if I'm even barking up the wrong tree). Hypothetical (*simplified*) example... Let's say that starting at 00:00 on 4/18/08, I will start recording the number of users accessing at a web site once every minute. I need ...

34. Separate merged binary files    coderanch.com

Well, let's just put Java aside for a moment. Is this one particular file you're trying to recover the data from? And do you have the encryption key for the first file of the two? If so, here's what you do: 1) Run gpg to decrypt the combined file, supplying the key as needed. That will give you the first decrypted ...

35. binary file upload problem with jakarta    coderanch.com

36. force download of a binary file    coderanch.com

37. Obtaining the contents of a binary file    coderanch.com

Read them into a byte array. Here is a method that will do that for you: // Returns the contents of the file in a byte array. public static byte[] getBytesFromFile(File file) throws IOException { InputStream is = new FileInputStream(file); // Get the size of the file long length = file.length(); // You cannot create an array using a long type. ...

38. Binary file read/write Question    coderanch.com

I am using the following code to read in a PDF file and writing the contents out to a different file. I am expecting that I should be able to read the second file using the Acrobat reader. I can but the contents are blank! The original file is a proper PDF with text and images.Am I missing something obvious? Everything ...

39. How to download binary file    coderanch.com

I am trying to automatically download some zip file. I write this code url = new URL("http://someaddress/file.zip"); conn = url.openConnection(); rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); FileWriter fout = new FileWriter("temp.zip"); while ((character = rd.read()) != -1) { fout.write(character); } rd.close(); fout.flush(); fout.close(); To my surprise I found out, that my temp.zip file is always corrupted in this way: characters 90h, 98h, ...

40. Java 5 and Binary Files    coderanch.com

The File class is just a representation of a pathname or filename in the file system. It doesn't have anything to do with the contents of the file. Your second piece of code will not compile, because class java.io.DataOutputStream does not have a constructor that takes a java.io.File as the argument. You could have discovered that quickly by writing a small ...

41. transfer downloaded binary file from local webserver to external device    coderanch.com

I want to have several locked-down workstations where a simple web app can run and users can't access much else. The machines will download large files from a remote server and need to then be able to detect and transfer the file to a user's plugged-in (USB, etc) or wireless (Bluetooth) device. I would like for the user to be seeing ...

42. Binary Files    coderanch.com

Here is the deal. I have this program that takes a file path and uploads a file into Documentum Server. This works fine when the file is on the server that my application is running on. However, the problem is, that they cannot pass me the file path because the files that are being uploaded are coming from the client's computer, ...

43. Problem obtaining last record of a Binary File    coderanch.com

Hello! Thank you very much for the replies to my inquiries. This is in connection to my previous posts here and here. I am now successful on obtaining the correct data from a Binary file using RandomAccessFile. However, I could not seem to understand why I couldn't get the last record (or imaginary row) of my binary file. My program just ...

44. Copying a Binary (EXE) file    coderanch.com

Hi, I am tring to copy an exe using the follwoing code: FileInputStream fis = new FileInputStream("D:\\sandeep\\ipconfig.exe"); BufferedInputStream bis = new BufferedInputStream(fis); FileOutputStream fos = new FileOutputStream("D:\\sandeep\\test.exe"); BufferedOutputStream bos = new BufferedOutputStream(fos); int b = 0; while ((b = bis.read()) != -1) { bos.write(b); } fos.flush(); fos.close(); The original file was of 55KB. The copied file is of 48KB and also ...

45. Difficulty in getting hold of a binary file!    coderanch.com

What is the connection between "myInstance.getBin_File().toString().equals("")" and the "binary file being blank"? What kind of object is returned by the getBin_File() method? If it's a file, then the toString method does not return what you think it returns. Also note that whenever binary data is involved, you should not be using string methods and string comparisons.

47. Reasding large binary file    coderanch.com

I am quite new to file reading in Java, and I have read the tips and information on this forum as well as generally googling about it. Here's my problem in a nutshell. I have an extremely large binary file (image, unknown format, but file format specs are available) ~ 380 MB. I am trying to open it and read it ...

48. To build a java repository for binary files or not?    coderanch.com

Ok, here is my dilemma. I have a single BINARY file that needs to be edited by myself and one other. We live hundreds of miles away from each other. We do not want this binary file to be located on our local PCs but instead somewhere we have access to anywhere there is an Internet connection. We want the ability ...

49. Find string in binary file    coderanch.com

The best way to accomplish that is to design the contents of the file so that you know the things which you now don't know. One common technique is to prefix the binary portion by, say, a four-byte integer value containing the number of bytes in the binary portion. But perhaps that has already been done? You could ask the person ...

50. binary files and char []    coderanch.com

In java.io, Readers/Writers are for text and InputStream/OutputStream are for binary data. There are also 2 classes, the InputStreamReader and OutputStreamWriter which are for bridging between byte streams and character data using specified character set encodings. Part of the problem you can run into with using bytes when you should be using chars is that it only works for basic ASCII ...

51. newbie: check binary type of file    forums.oracle.com

52. Storing data in binary files    forums.oracle.com

I am trying to store my data in binary files to save space and lessen time spent on hard disk reads. However, I can't seem to find the proper way to do this in java. For example, I have the integer 65535 in java. How do I convert it into a 2 byte string FF FF in java? When I read ...

53. Binary Files    forums.oracle.com

54. Getting problem while editing a binary file    forums.oracle.com

Hi All, I am trying to edit a binary file using Java.The file contain a string that I have to replace with some other string.For exanple let us assume following is the content of the file - g ABC g Here, I have to replace this ABC(a string) with some other string.Now,if the replace string length is more than 3(the length ...

55. editing binary file    forums.oracle.com

hi I have a dump file(a export file from oracle), it is a binaray file. But it has some text inside that i need to edit using java. I use the bufferedReader and the printwriter methof to edit the file. But after editing the dump file, it could not be read by Oracle. So is there any method that i can ...

56. Binary file content check fails!    forums.oracle.com

The purpose of toString() is (supposed to be) to return a string identification of the object. That doesn't necessarily mean the contents of the object; in fact, it normally wouldn't. For example, suppose an object holds a 100,000-word dictionary. It's toString() response could appropriately be "[100,000-word widget dictionary]", and not every word in the dictionary. So, if you're checking to see ...

57. File -> Binary -> String = wrong output    forums.oracle.com

k clear ... no it works fine ... wanted to show a content of a .mdb but now i got jackaccess (jdbc typ 4 driver) working I copyed it wrong there is it only one time in my qc binaer_string=b.toString(); that would be right onto 2nd place but anyway I would like to know how to get out a String of ...

58. Binary File compare - Problem with char 65533    forums.oracle.com

59. Binary File    forums.oracle.com

I have a binary file. But NO file specification. I know that that the binary file is containing byte, int, long, etc. BUt i dont knwo the order in which these data types are put in to the binary file. So i am not able to use the code, DataInputStream dis = new DatainputStream("filename"); dis.readInt(); functions to read the binary file. ...

61. Speed Question - Fastest way to Scan a Large Binary File    forums.oracle.com

You seem to have independently invented the [Boyer-Moore algorithm|http://en.wikipedia.org/wiki/Boyer_%E2%80%93_Moore_string_search_algorithm]. At least partially, you have the idea of starting with the right-most character. You don't follow up by skipping the next character after an FF even if it wasn't preceded by EE or DD. But really, you can't make the algorithm much faster because the processing time is going to be dominated ...

62. Binary files update    forums.oracle.com

Hi friends!!!!, I need to create and after update (append) a binary file (images). The issue is that I don't want to open the file, get the binary information, append the new information and create a new file. I really need to protect the performance. How can I do that? Thanks in advance!.

63. Problem in reopening a Binary File    forums.oracle.com

I have a Frame. It contains a button. On the click of that button I create an instance of one class, which reads a binary file and closes it. That file is created by FileOutputStream and DataOutputStream When I am reading this file - I am having a code snippet like this: File file = new File(record_filename); FileInputStream fin = new ...

64. How to create Binary File    forums.oracle.com

Read your database and SQL manuals about BLOBs. That's the keyword to look up: "BLOB". Why do you want to do this, by the way? Actually let me rephrase this: are you sure you don't want to put just the ID3 tags in the database? Edited by: paulcw on Mar 25, 2008 11:56 PM

65. Binary file problem    forums.oracle.com

66. Binary files.    forums.oracle.com

67. Rading a binary file    forums.oracle.com

public boolean writeNode (java.io.DataOutputStream out, String name, long id, int x, int y) { try { byte l = (byte)name().length(); out.writeByte(l); if (l > 0) out.write(name.getBytes()); out.writeLong(id); out.writeInt(x); out.writeInt(y); return true; } catch (IOException ex) { return false; } } I now want to read this file. Can someone help me plz? Thanks.

68. How to extract binary data from a File?    forums.oracle.com

Hello there! Hope I'm right here. I have a slight problem with a file containing text- and binary-data. At the beginning of the file is only some text followed by some html-code and at the end is some binary stuff like a pdf oder an image (jpg/gif). My problem is now how to split these parts and save them in the ...

69. Complexity of searhing in binary files    forums.oracle.com

Hello! I have question regarding complexity when searching in a binary file. I have a app that needs to perform a search for a certain string in a large binary file (> 1Gb). For the moment, I read one line of the file into a byte array, convert it to a string and than look for any matches with indexOf. This, ...

70. Bit comparison on binary files    forums.oracle.com

Hi I am trying to compare two binary files in order to find out how many bits differ between the two files. I dont know how to reference file 'bits' in order to perform the comparison however, and i cannot find much information online. Can anybody give me some pointers on how to start or point me towards some helpful information? ...

71. Binary file to variable    forums.oracle.com

73. import binary files    forums.oracle.com

hi, I am using netbeans javacvs api +java.Can any one plese help me out to explain how to import binary files in cvs repository with importcommand. Which of the importcommand's method is use for import binary files. please give me example of code to import binary files. Thanks in advance. Regards, Ruchira

76. searching binary data file    forums.oracle.com

Hi I have a data file which acts as a database. I need to search this file for records. I am trying to implement this in the most efficient way I have the following extremes 1)To search using RandomAccessFile each record directly from the file 2)Load the entire file into memory. By encapsulating each record in a lava object. 1st option ...

java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.