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Java I/O Q&A » Operation » read 2 

1. Is is possible to use Java to read bitmap file header?    stackoverflow.com

I found a problem when loading a bitmap file in my working company software. It crashes the software when I drop in the bitmap file. However, I am trying to create ...

2. How do I read an RMS file from a Nokia S40 device?    stackoverflow.com

I have an RMS file generated on an S40 Nokia phone - is there any way of reading this on a PC? I'm trying to debug an issue on the phone, ...

3. unique delimiters while reading a file    stackoverflow.com

I am reading a file into byte array, i have inserted some control command into it, which I need to decode in some other class. But how to identify and separate ...

4. Reading Grib2 files for lat/long data    stackoverflow.com

Anybody here doing meteorological or earth-sciences work? I am trying to work with GRIB2 format data files. There are libraries available, in particular the Unidata GRIB Java Decoder. And I can ...

5. reading file from getResourceAsStream omits newline    stackoverflow.com

I'm reading a resource from getResourceAsStream, adding all text to a StringBuilder and writing the content to a new file. However, the text comes back without newlines. When i do the same, ...

6. How can I read some variable in one inputline? (Java)    stackoverflow.com

How can I read some variable in one inputline in Java? Sorry for my beginner english Forexample: Enter a, b, c: 1.0 3 1 <Enter> Then I would like to the a=1.0, b=3 and ...

7. Read Multiple Files In Java    stackoverflow.com

I want to read multiple files into Java at once. File names are like:

  • nnnnn_UM2012.txt
  • ghkjdf_UM2045.txt
  • erey_UM2189.txt
  • ....
There are over 1,000 files and I do not want to write all files names in Java ...

8. Read java special character from a string in a file    stackoverflow.com

I am making a program that reads code from a java file and removes all the comments, but I am having some problems with special character since I am assuming everything ...

9. How to read only relevant information from a file and ignore everything else?    stackoverflow.com

Someone please edit my title to make this question more clear. It's easier to show using an example: Contents of myfile.txt:

10/05/2011: 10
10/05/2011: 45.4
10/05/2011: 12.1
I want to read the numbers after the date (10, ...

10. How to read a dicom file by using java program    stackoverflow.com

I am trying to write a medical program which needed a to read and change the dicom(.dcm) file, but I tried my best and still find no way to open it. ...

11. Reading statistics from a file    stackoverflow.com

One of the homework assignments my instructor gave me was a baseball statistics program. It reads from a file called stats.dat, which contains the name of a baseball player's name and ...

12. Using substrings while reading file data    stackoverflow.com

Last night I asked a question like this, I'm not sure what's happening and I have encountered another problem so here goes: My instructor has given my class a project a program ...

13. Reading from file and sort into subsets    stackoverflow.com

I am working on a project where I need to read a bunch of floating point integers from a file and sort them into subsets. The subsets need to be sorted ...

14. Read a specific column from any type of file    stackoverflow.com

how can i read any type of file from a location and access only a particular column to perform some operations on it. some rows in my column may contain null ...

15. What is wrong with Java File read?    stackoverflow.com

I deal with a file problem.

IBM 7918 Ayse Durlanik 7600 Computer
------------------------------------
Gama 2342 Mehmet Guzel 8300 Civil
------------------------------------
Lafarge 3242 Ahmet Bilir 4700 Chemical
------------------------------------
Intel 3255 Serhan Atmaca 9200 Electrical
------------------------------------
Bilkent 3452 Fatma Guler 2500 Computer
------------------------------------
Public ...

16. Reading records from file of Pagesize only    stackoverflow.com

I am a beginner and I have a file having variable sized records; there are two fields per row i.e. one is 7-15 digits key and then followed by space there ...

17. Reading the header of a file in java    stackoverflow.com

Does any one know how to read the header of a file in java using "magic numbers" or ascii values to get the name of the extension of a file

18. Avoid Repeated File Reading Java    stackoverflow.com

After parsing a file, I put everything in Map mainMap. The mainMap object is an attribute of a class. All methods in the class access and change this object(e.g element removal). This ...

19. Conflict using file.available() to show progress of in.readObject() reading one large Object    stackoverflow.com

I have a single large Object (about 20MB) I sometimes write to or read from disk. There are no problems doing this and waiting for completion but it takes about ...

20. Deliminating While Reading a File    bytes.com

If the file only contains numbers why don't you just use fileScan.nextInt() each time you want to read one? There is no need to read Strings and fiddle with those. kind ...

21. Reading tsv files in java    bytes.com

22. reading Xsd file in java    bytes.com

Hi! This probably is not what you need: http://mindprod.com/jgloss/xsd.html but I could not find you anything; I would like to invite you to search and see http://www.coderanch.com/t/428314/XML-Related-Technologies/Reading-XML-using-XSD-schema My Google results:-) http://www.google.com/search?hl=en&r...&start=10&sa=N ...

25. Reading Binary    coderanch.com

Each file has to be investigated to determine what classes and methods are best suited to read it. In general if the file is all text, Readers can easily be used to read the data. If the data is numeric saved in binary form, InputStream classes are best but, you may have to do some bit manipulation to determine the information ...

26. maximum data which can be read from....    coderanch.com

27. File reading    coderanch.com

28. Reading HTML file    coderanch.com

Hi, I'm trying to read a HTML page & print out the email id's in that page. I have a problem while using the String Tokenizer. I pass the "mailto:" tag we use in the HTML to identify the email id's as the delimiter string in the String Tokenizer. Here's the sample HTML page & the java code I used. HTML ...

29. how can i read this    coderanch.com

The thing which i want to know is that i want to read data from a file ,data is in the following format empno name sal 111 Sam 5000 222 John 6000 333 Susan 4900 how can i read this data from a file ,when the user enters his or her empno rest of the information is also fetched ,how can ...

30. How to read MSWORD and MSEXCEL document    coderanch.com

31. Reading Records One by One    coderanch.com

I may be wrong, don't think your code really reads all the results at once. Not if you use JDBC, anyway. When you get a ResultSet back from a query, you have only the "next" nethod to advance to the next result. You have to do this repeatedly until you have got enough (or all) results. The ResultSet is free to ...

32. Loop & System.in.read weirdness!    coderanch.com

Sorry, this will be a long post, perhaps... I have run into a few strange issues with using loops and System.in.read(). I am getting multiple passes on loops that should only get one pass before any input (or at least they sure look like they should only be getting one pass to me...). I will give three of my code examples ...

33. How can i read data from file    coderanch.com

Hi, the following code will read a file and return the files data a line at a time. I am not sure how you want to process your data, but this part will at least show you how to open a file and access the data a String at a time. bwin.readline() returns a null when it gets to the end ...

34. Can I set a file to Read only n java???    coderanch.com

35. read from a file into a string    coderanch.com

Sure you can. You have to write it yourself, but it's not too hard. Here's a quick solution:

 public static String toString(File file) throws IOException { StringBuffer sb = new StringBuffer(); Reader reader = new FileInputStream(file); char[] cbuf = new char[1024]; int num; while ((num = reader.read(cbuf)) >= 0) { sb.append(cbuf, 0, num); } return sb.toString(); } 
You can ...

36. How to read from DOS pipe?    coderanch.com

A friendly place for programming greenhorns! Register / Login Java Forums Java I/O and Streams How to read from DOS pipe? Post by: Roy Hellinga, Greenhorn on Jul 20, 2001 08:08:00 I have a need to pipe the output from a DOS utility into my Java program. I have tried a few combinations without success. I can't seem to ...

37. Reading a 300M file in Java the best way?    coderanch.com

Ummm... what are you going to do with it? In general, avoid trying to read th whole thing into memory at once. Try to process it as you read it, and don't store stuff in memory you don't need. How you do this really depends on what you need to do with the file...

38. short simple stumper: reading doubles from the cli    coderanch.com

Here's a short program that's supposed to read positive doubles in from the command line as the user types 'em in and hits enter. It's got some very strange behaviour. First, the code: import java.io.* ; public class DoubleReading { public static void main( String[] args ) throws IOException { DataInputStream inp = new DataInputStream( System.in ); DataOutputStream outp = new ...

40. How to read a file block by block?    coderanch.com

Hi, Here is the sample code for reading a file block by block.. This piece of code extracts the full content(html) from a url and store a particular block(means from

to
) in a file called somefilename.txt import java.net.*; import java.io.*; import java.util.*; class strbuf { public static void main(String ar[]) throws IOException { URL url=new URL("http://www.usbullionexchange.com/pricesonline.cfm"); BufferedReader buf=new BufferedReader(new ...

41. Reading file    coderanch.com

This will work:

 import java.io.*; public class Line { public static void main(String[] args){ try { BufferedReader reader = new BufferedReader(new FileReader(new File("/somepath/Line.java"))); String line; while((line = reader.readLine()) != null){ System.out.println(line); } reader.close(); } catch(Exception ex){ System.out.println(ex); } } } 
------------------ Chris Stehno (Sun Certified Programmer for the Java 2 Platform) [This message has been edited by Chris Stehno ...

42. method to read a string    coderanch.com

I tried writing a String input method and had a problem with throwing IOException so i tried to use a try/catch statement, but then the variable to be returned is said to be "not initialised" by the compiler. wats the problem? can anyone help? here's the code; public static String getString() { InputStreamReader input; BufferedReader bR; String s; try{ input = ...

43. reading binary data    coderanch.com

I'm not sure what application created the file but it should be 110 lines of 30 floats and integers. I know that each float and int is 4 bytes long. I'm unsure of what convention is used for the floating points. I was worried about the need for byte swapping and if the dataInputStream could be used if byte swapping is ...

44. A problem with reading files    coderanch.com

You can't immediately read the sixth line without first reading the lines before it. This is because you must count the new line characters in the file to know what line you are on. E.g. after reading five '\n' characters you know you are on line six. You could write a method like the one below but it still needs to ...

45. problems with in.read()    coderanch.com

import java.io.*; public class Echo { public static void echo( InputStream in ) { System.out.println("in echo"); try { System.out.println("in try"); while (true) { int i = in.read(); if ( i != -1 ) { System.out.print( i ); } else { System.out.print( "end" ); } } } catch ( IOException e ) { System.out.println( e ); } System.out.println(); } public static ...

46. Reading files    coderanch.com

Apparently Properties file is not meant to be read dynamically. In other words, I cannot go through a directory and create Properties files basd on available files that have attribute=value format. Pleass, could someone show me the way on how to go about doing the above. I need to read values from files and upload them onto table. Thanks.

47. Not Reading Entire File    coderanch.com

Hello, I'm trying to read a fairly large file into my program. The problem is that it is not reading all of the file. It stops after about 22k. Can anyone out there give me a solution to this? I am using the code: try{ FileInputStream fileIn = new FileInputStream(f); InputStreamReader inReader = new InputStreamReader(fileIn); int length = (int)f.length(); BufferedReader in ...

48. Receive reading and display    coderanch.com

Dear Friends, I would like to code a java application which receives reading from a test machine and displays the reading on the monitor in the form of excel. Another option is that I save the reading from the machine with hyper terminal as a ht file. Then my java application copy that file and displays it in excel. Thank you ...

49. Cpp create file, java read it, how to do this    coderanch.com

Hi, I need create a text file by using C++ and then read the file back by using Java. The file will be a text file contains numbers. I have some problems to do this. What I read from the file is not what I expected. I think probably it caused by the sizes of numbers, such as int and double, ...

50. Read file from mainframe    coderanch.com

51. System.in.read()    coderanch.com

Yes, you're getting ASCII values (or rather, ISO-8859-1 values, most likely) of the characters entered by the user. You can convert the user input into a single String by wrapping System.in in an InputStreamReader, and wrapping that in a BufferedReader (which has a readLine() method). Then you can use Integer.parseInt(String) to convert the String to an int.

52. How to read a file?    coderanch.com

I have a text file which contains one e-mail address per line. what i want to do is i want to read each line of the text file from a java file and store this emails in a String array of that java file. can any body sujest what classes and functions of I/O package i have to use. Thanks in ...

53. How to read html file?    coderanch.com

Hi Friends, I want to read a html file (which has links to plenty of .gif and .jpeg ) through my java file,and send that html file by e-mail using Java mail. So here I am in little bit confuse in reading HTML file.How i shoud read HTML file either using Byte streams or charecter streams. I am thankful to you ...

54. How to read file    coderanch.com

Hi, Let's say I have size of the file(with the contents inside) is 4000 bytes. I want to read the bytes from 0 to 500 only and I want to put that (0-500) into an array of string. How can I do this? If I can get example would be nice. Thanks Angela

55. Reading .rom file    coderanch.com

Hi I would like to know If I have a Data of .rom file, how do I be able to read this data. Is .rom file of certain Database, If so what database it is of, With what can I view the .rom file data. Any help in the above context would be highly appreciated Thanks

56. How to Read a Flat File Data    coderanch.com

Hi Ranchers good Morning. This is my fisrt Query in this forum. I want to read a flat file data using JAVA. How to do this. I heard that StringTokeinger to be used.What exactly it is? i.e How to read and Write on to flat file using JAVA I/O strems. Thanks in advance. Regards Khad M SCJP2.0

57. File Read Help???    coderanch.com

This sounds like a school assignment. What do you have so far? An important question: Must the program resume from its previous state each time it runs (as if it had never stopped), or can it simply start from scratch (as if the file has never been modified)? David Weitzman [ May 06, 2002: Message edited by: David Weitzman ] [ ...

58. reading from the end of file    coderanch.com

hey folks, i have a huge log file (asci text) but i need to read in it only a number of last lines (the logs from the last day). i pretty hate all io stuff didn't find any method in the api which lets me read lines from the end. is it any way to do it without reading all of ...

59. Reading Char into string    coderanch.com

Hi everyone. I am reading a flat file in this format KID|AG01|Anteneh|Gebreal|OG|19961128|Pig|A* KID|AC02|Aurakeasamy|Carmine|OG|19960519|Square|A* KID|BA03|Beukman|Ashley|OG|19960711|Star|A* KID|BE04|Bihl|Elrique|OG|19951229|Teapot|A* KID|CH05|Chauhan|Harsheel|OG|19960812|Robot|A* KID|CD06|Chipaka|Danteek|OG|19960514|Seal|A* KID|DS07|Davies|Sandile|OG|19960828|Triangle|A* KID|DS08|de Assuncao|Sergia|MG|19970206|Iron|A* unfortunately I can only get it back in char format, how can i get a string for each line, iterating? I can then us a stringtokenizer to break it up for my database. some code would be most helpful Thanks, regards ...

60. InterruptedIOException: Read timed out    coderanch.com

I have a client that opens a URL connection to a servlet and sends data in post stream. The client uses writeObject to serialize an object into the post stream. Client invokes the servlet over and over again, for 2000 records of data, sequentially. Looks like the servlet fails at random when reading data from the post stream. Servlet failed with ...

61. how to read from a file ?    coderanch.com

i need to perform some string operations on strings contained inside a text file. So how does one read the strings from the text file into the program ? eg say the text file contains names: john mary edwin bill george rossane i need to be able to read each of the above strings into my program and do say things ...

63. Reading from a Named Pipe File (Solaris 2.6)    coderanch.com

I posted my issue before, yet with no responses, and now I've found the real issue. Here we go... I'm having problems reading from this named pipe file on Solaris 2.6. Below is the output of an ls -l on the named pipe. notice that it has a "p" as the first character instead of a "-" for a regular file ...

64. Java File Reading    coderanch.com

Hi.. I have a file AddressBook.dat that has as contents: ID Name Address City State Zip 1. John Small 123 Main St. Laurel MD 20708 2. Fig F. Big 1145 Techie Dr. New York NY 45446 I have to create a Java program that takes ID as input and prints out the name,address etc for that ID separately. Can sumone help ...

65. How do I read from Unix system when my application is running in NT.    coderanch.com

If what you're asking for is the ability - as an NT user - to view a PDF that is stored in a file on a Unix machine, there's no Java or other programming required. If the Unix machine is part of a LAN to which your NT machine is also attached, these days it's likely to have Samba or a ...

66. best method to read a long file    coderanch.com

InputStream in = ...; // Reader in = ...; byte[] buffer = new byte[1024]; // char[] buffer = new char[1024]; int readCount; while ((readCount = in.read(buffer)) != -1) { // the first 'readCount' bytes // from the input stream are at the // beginning of 'buffer' // do something with them }

67. how to read in an n * n matrix and how to form it?    coderanch.com

Offhand, the simplest/nicest solution that comes to mind is to let the user input the whole matrix at once, separating each element in a row with one type of delimiter (like a space) and separating rows with another delimiter (like a newline). The end of a matrix could be signaled with another character, like a '.'. Use a BufferedReader to read ...

68. Reading Tabs    coderanch.com

I got a text file that has the following is an actual TAB keystroke US United States USA CA Canada CAN I just wanted to be able to access the 3 elements in each column so I did the following: import java.io.*; public class file { public static void main(String[] args) { File csv = new File("wl.txt"); try { DataInputStream ...

69. read in an integer    coderanch.com

70. Want Help Reagarding Reading Text    coderanch.com

71. Reading file from the Internet    coderanch.com

Hi: I have an applet with the following code: String theFile, thePath, theWorkFile; theFile = getParameter("myfile"); thePath = getParameter("mypath"); theWorkFile = thePath + theFile; FileInputStream myStream = new FileInputStream(theWorkFile); I have no problem when I run this locally. The applet is able to read the file. But when it runs from the Internet it does not work. I get the following ...

72. Need Help - Read a file from client    coderanch.com

Hello all the java bofins, Since i am new to this arena of object oriented programming I need some help. I am trying to write a client java program which read a text file from a local drive. First check's the creation and modification date of that file and then Interogates it by going through the text in the file and ...

73. Read Some 10,000 Files    coderanch.com

I have to read some 10,000 files -- the exact nuber is uncertain, and retrieve information from each of those files. I am going to do the reading in a loop. I do not know the exact number of files are there. What should I do? If I use Vector, is the Vector going to get too lengthy?

74. read from file    coderanch.com

The skip() method is quickest. However it doesn't guarantee that the requested number of bytes will actually be skipped (since it's possible something in the stream will block, the method returns early to let you do something else if you prefer). To make sure the desired number of bytes are really skipped, try something like this: int bytesToSkip = 200; while ...

75. read( ) method    coderanch.com

76. Reading very large files with Java    coderanch.com

Hello everyone. I am starting a project where we would be reading very large flat files (~400MB), performing some data manipulation to the data on these files, and then preparing these files to load to Oracle. Does anyone have any advice for an approach to doing this? Any help you could give would be greatly appreciated. Thanks! -R

77. How to read a description of a file    coderanch.com

hi kajalsingh, can u explain ur requirements in little more details? at first sight i would incline to answer the follwoing, 1. if u r on Unix then i would consider "ls -l" as the descriptive information for any file. - you can run Runtime.exec() and then get its Process's outputstream to read in the output line and - then parse/interpret ...

78. Reading Files inside a file    coderanch.com

79. Read a C file in Java    coderanch.com

80. Reading matrix    coderanch.com

Why read the matrix when you can watch the movie? *ba-da-dum* Seriously, are you trying to read the matrix from a file or a stream, or are you interested in the logic needed to traverse the matrix? If the latter, this question would be better suited in a different forum, as this one is solely for reading and writing using I/O ...

81. Time out in case nothing is read    coderanch.com

Either that class can extend TimerTask, or you can create a separate class that represents the task. However, doing that usually invovles needing some reference to the class you're going to be checking for received input. So unless your input reading class already extends something, I would go with the first option. A simple example: public class InputClass extends TimerTask { ...

84. read file pullzed    coderanch.com

85. simple I/O read into char[] using the fileLength    coderanch.com

A friendly place for programming greenhorns! Register / Login Java Forums Java I/O and Streams simple I/O read into char[] using the fileLength Post by: Ram Kumar Subramaniam, Ranch Hand on May 05, 2003 00:11:00 Please understand the code below first. I am trying to read the a file into a character array. This works great. But......... here's.... my ...

86. how to remove the read only    coderanch.com

87. suggestions on reading from file    coderanch.com

Hello, I have a pipe-delimited file that I want to read from. As I read each line of file, I tokenize it and put each token in an Object[][]. Everything works fine, the only problem is that it taks too long to read whole file. Is there a way to speed up this proccess? Code is below. thanks, Alex grid = ...

88. read stdout of an executable ran on the command line    coderanch.com

>By standard output, do you mean to the console? Are these both Java > >applications? >There are PipedInput and PipedOutput streams, but not sure how you are wanting >to hook those out to the exe output. Yes to the console... No only the application doing the listening of stdout is in java... Basically I want to parse the stdout output of ...

89. help with reading ms-word using java    coderanch.com

90. Read specific String value from File....Help..    coderanch.com

Hi, THis is what i want to do. I have =============================================== 1. Provider Name: Abrar, Naim, MD Specialty(ies): Internal Medicine Address: 1149 Old Country Road, Bldg C Suite 1, Riverhead, NY 11901 Phone Number(s): (631) 369-3333 Provider Detail Enrollment IDs Map 2. Provider Name: Alter, Seymour, MD Specialty(ies): Internal Medicine Address: 222 East Main Street, Smithtown, NY 11787 Phone ...

91. Basics: How to read chinese characters from an ANSI-encoded file    coderanch.com

So, my situation is this: I have a text file containing sequences of "\uXXXX" (chinese characters in a file of which encoding is ANSI). What I need to do is read these sequences of characters into String objects. Now, being a newbie in everything related to character sets, I tried to "just read it" using a FileReader but "\u78ba\u8a8d\u624b\u6a5f\u865f\u78bc" in the ...

92. reading from file    coderanch.com

how would i read numbers from a file, they arranged in tabular form with x and y cordinates.given below. 23 122 121 23 242 44 22 . . . the first number gives the number of x y pairs in the file. and then the x and y cordinates are listed below. thank u

93. any help on reading data please    coderanch.com

Hi, I am trying to read data into ByteBuffer using SocketChannel. The following code working fine but the problem is with ByteBuffer size. The data varies from request to request . How do I read data into ByteBuffer with out specifing size . The problem with size is some records has more than 500 bytes and some are less than 500 ...

94. File reading and manipulation    coderanch.com

Hi, I have a requirement with regards to i/o and hope someone can help me. In my java swing application, I have a text file (to store user preferences) which I have included in the jar file itself. When my application is launched I read this text file from the jar file using java.util.jar classes. Partial code to do so is ...

95. How to read a file like the following    coderanch.com

96. not able to read file which exists    coderanch.com

Hi I am new to java and I am trying to get the file name as an input from the user. This file exists in my directory. Bu when it is checked with f.canRead(), it returns false. What is the mistake in this program or is it the way I give my input. here is the code package jpb; import java.io.*; ...

97. Reading raw data    coderanch.com

98. help with file reading in    coderanch.com

i have a file with an output like this: 1> 85 25 ee 58 ef 56 36 2> 45 ee 56 41 25 2c 36 . . . 10> 45 ee 56 41 25 2c 36 11> 25 ef ee 25 36 21 de . . . i am trying to store the packet bytes (85,25,ee...) to compare to other values. ...

99. How to read the complete contents of a file in a String?!    coderanch.com

private static final int BLOCK_SIZE = 8192; private static final int EOF = -1; public static String readToString(Reader reader) throws IOException { StringBuffer buffer = new StringBuffer(); char[] charArray = new char[BLOCK_SIZE]; for (int n = reader.read(charArray); n != EOF; n = reader.read(charArray)) { buffer.append(charArray, 0, n); } reader.close(); return buffer.toString(); } public static String readToString(InputStream is) throws IOException { return ...

100. Read file    coderanch.com

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