Need help reading a text file!!!!

What i need is a simple example of how to read data
from a text file into a applet
so i can put the values in the file into a array
the file will be in the same folder as the the applet
say i have a file myfile.txt with the following values written in it
5
10
15
20
i want to read them into a simple array myarray[]
for later use
everything ive tryed wont work and i havent gotten a response in the the new to java forum

//set up file reader
java.io.BufferedReader in = new java.io.BufferedReader( new java.io.FileReader("myfile.txt") );
//set up vector as we dont know how many lines there are in file
java.util.Vector vect = new java.util.Vector();
//store lines in vector
while(in.ready())
vect.add( in.readLine().trim() );
//close file
in.close();

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Urgent Help:read from text file and write to table

Hi,
I'm a super beginner looking for a vi to read this data from a text file and insert it into a table:
   #19
Date: 05-01-2015
ID= 12345678
Sample_Rate= 01:00:00
Total_Records= 2
Unit: F
   1 03-23-2015 10:45:46   70.1   3.6
   2 03-23-2015 11:45:46   67.7   2.7
Output table
#     date                 time                 x          y        Sample rate    Total Records
1          03-23-2015     10:45:46        76.8     2.8      01:00:00           2
2          03-23-2015     10:45:46        48.7 2.1      01:00:00           2
Thanks for your help in advance.
Attachments:
sample.txt ‏1 KB

jcarmody wrote:
Will there always be the same number of rows of noise header information?
Show us how you've read the data and what you've tried to do to parse it. Once you've got the last rows, you can loop over them using Spreadsheet String to Array (after cleaning up a few messy spaces).
Jim,
I didn't know you're that active on here.
Yes, There will always be the same number of noise header information.
I'll show you in person
Regards,

How to read two text files using the Read from spreadsheet.vi and then plot it

I need to read two text files using the read from spreadsheet function and then plot these files over time.
The file with the .res extention is the RMS values (dt and df) and the second file contains the amplitude of a frequency spectrum.
I really appreciate any help..thanks
Attachments:
RMS.txt ‏1 KB
FREQUENCY.txt ‏1 KB

From NI Example Finder:
Write to Text File.vi
Read from Text File.vi
Jean-Marc
LV2009 and LV2013
Free PDF Report with iTextSharp

Read from Text File Detailed Help need Clean-up

This is probably well known and nobody has bothered fixing it but the detailed Help of the "Read from Text File" function is sort of ambiguous:
- statement 1: refnum out is the refnum of the file that the function read. You can wire this output to another file function, depending on what you want to do with the file. The default is to close the file if it is referenced by a file path or selected from the file dialog box. If file is a refnum or if you wire refnum out to another function, LabVIEW assumes that the file is still in use until you close it.
- statement 2: If you wire a path to file, the function opens the file before reading from it and closes it afterwards.
I have found statement 1 to be correct, which makes statement 2 incomplete (and sort of tautological in the sense that 1) you expect LabVIEW to open the file before reading from it if you provide a path instead of a refnum... and 2) if you use a path input to file AND use the refnum out for some other function, the file is NOT closed, as correctly stated in statement 1).
Just sayin' ...

X,
It deeply concerns me that you would take my response to mean indifference. I certainly had no intention to belittle what you had to say. On the contrary, I took this up with the concerned team, and had a small discussion. If you say that what someone says on this forum is of lesser or no value to National Instruments, you could not be more wrong. It defeats the whole purpose of this public forum.
My point was not that it is not an issue, it certainly seems to be. Please be rest assured that even if it does not look like it from the outside, each comment however big or small is taken back to our workplaces and some thoughts poured over it.
On the whole, I recognise that I had a role to play in this misunderstanding of tone, and I sincerely apologise.
Warm Regards,
Prashanth N
National Instruments

I need help with a PDF file that is an image, the "Read Out Loud' option does not work, please help!

I need help with a PDF file that is an image, the "Read Out Loud' option does not work, please help!

You mean an image such as a scanned document?
If that is the case, the file doesn't contain any text for Reader Out Loud to read. In order to fix that, you would need an application such as Adobe Acrobat that does Optical Character Recognition to convert the images to actual text.
You can also try to export the file as a Word document or something else using ExportPDF which I believe offers OCR and is cheaper than Acrobat.

Read from Text File - Help Bug?

Hi - I am currently working on LV8 and I think that there is some misunderstanding potential in the help file. To be more exact in the help to the "Read From Text File" VI.
The description for "count":
" ... If count is <0, the function reads the entire file. The
default is –1, which indicates to read a single line if you placed a checkmark
next to the Read Lines shortcut menu item and to read the
entire file if you removed the checkmark next to the item. "
If count is lower than zero, the function reads the entire file. That sounds clear to me.
The default is -1, which indicates to read a single line if you placed a checkmark next to the "Read Lines" shortcut menu item. Now what? Does it read a single line or the whole file?
.. and to read the entire file if you removed the checkmark next to the item. I thought it reads the whole file if I use -1 ?
the VI itself behaves as I'd expect it to:
* If I place a checkmark next to Read Lines and put -1, I get an array containing the lines
* If I remove the checkmark, I get only a single string item.
Now where is the error? Is the VI not working properly or only the description a little bit ... strange ?

?hein??
?what?
Both you guys lost me..
And I drink coffee without sugar (being sweet enough, already)
Here is what I get from Context Help on the Read From Text File:
Read from Text File
Reads a specified number of characters or lines from a byte stream file. By default, this function reads all characters from the text file. Wire an integer value to count to specify how many individual characters you want to read starting with the first character. Right-click the function and place a checkmark next to the Read Lines option in the shortcut menu to read individual lines from the text file. When you select the Read Lines option in the shortcut menu, wire an integer value to the count input to specify how many individual lines you want to read from the file starting with the first line. Enter a value of -1 in count to read all characters and lines from the text file.
Humm.
New feature (again).. If you select checkmark the Read Lines option, it will not send the text to a sting indicator, as shown in the attached image. If selected, then it's expecting to write lines to an array of strings... WHY??? I don't know.. I'll ask..
Strange... LV8 is full of mysteries...
RayR
Attachments:
bad write file.JPG ‏33 KB
more bad write file.JPG ‏12 KB

Help! Reading a text file in a JAR

How do I read a text file in a jar? (NON-applet).
Following doesn't work:
File f = new File("res\\dictionaryuk.txt");
Neither does this:
InputStream in = this.getClass().getResourceAsStream("res\\dictionary.txt");
(I read somewhere else here that one should use resources instead of files in a JAR, but I'm not certain about that, or why?)
It's not the pathname because I've tried everything.
"res\\dictionaryuk.txt"
"res/dictionaryuk.txt"
"\\res\\dictionaryuk.txt"
"\\dictionaryuk.txt"
"dictionaryuk.txt"
...you name it
And yes, the text file IS in the JAR.
Any suggestions? Sample code?

Okay, here is a quick example of how to do it that I tested and works...
I get the same values for the ZipEntry method and the InputStream.available method, but the available method is used for slightly different purposes, and may not always return the full size of the file (I have seen some instances where the value returned was always 0). Anyway, here it goes:
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
public class JARFileReading
     public static void main(String[] args)
          String fileName = "res/TestApplet.html";
          InputStream is = JARFileReading.class.getResourceAsStream(fileName);
          try
               System.out.println("Input Stream.avaliable: "+is.available());
               if (is != null)
                    is.close();
          } catch (IOException e)
               e.printStackTrace();
          File jarFile = new File("JarFile.jar");
          if (!jarFile.exists()) System.exit(0);
          JarFile theJar = null;
          try
               theJar = new JarFile(jarFile);
               ZipEntry theFile = theJar.getEntry(fileName);
               System.out.println("Zip Entry.getSize: "+theFile.getSize());
               System.out.println("Zip Entry.getCompressedSize: "+theFile.getCompressedSize());
               is = theJar.getInputStream(theFile);
               System.out.println("JarFile.getInputStream.available: "+is.available());
               if (theJar != null)
                    theJar.close();
               if (is != null)
                    is.close();
          } catch (IOException e1)
               e1.printStackTrace();
}

How to open saved files using 'read from text file' function

Hi everyone, I am having a hard time trying to solve the this particular problem ( probably because I am a newb to lanbview ). Anyway , I am able to save the acquired waveforms by using the 'Write to text file' icon. I did manually modify the block diagram of the 'Write to text file' icon and create the correct number of connector so as to make my program work. But now I have no idea on how to modify the block diagram of the 'Read from text file' block diagram to make my program 'open' my saved waveforms. Or i do not have to modify anything from the block diagram of the 'Read from text file'? Can anyone teach/help me connect up? Do i need the build array on the "open" page?
Here are some screenshots on part of my program
let me know if you guys would need more information / screenshots thank you!
Attachments:
ss_save.jpg ‏94 KB
ss_open.jpg ‏94 KB
modified_writetotextfile.jpg ‏99 KB

Ohmy, thanks altenbach. oh yeah i forgot about those sub VIs. will upload them now. Was rather demoralized after reading the comments and really struck me on how weak i'm at on labview really hope to get this done. But of course i have to study through and see how it works. Actually i am going to replace those 'signal generators sub vi' with ThoughtTechonology's sample code so i can obtain data waveforms real-time using Electrocardiography (ECG) ,Electromyography (EMG ) and Electroencephalography (EEG) hopefully i can find out how to connect the sample code.
( ps . cant connect it now unless my program is working otherwise labview will crash )
( p.s.s the encoder of my biofeedback trainer already acts as an DAQ so i wont need to place an DAQ assistant in my block diagram i suppose )
The sample code of ThoughtTechnology is named as attachment.ashx.vi. too bad i cant use it and present it as my project
Attachments:
frequency detactor.vi ‏53 KB
signal generator.vi ‏13 KB
attachment.ashx.vi ‏40 KB

Powershell script - how to read a registry hive and store the value in text file and then again read the text file to write the values back in registry

Hi All,
powershell script Method required to read a value from registry and then taking the backup of that values in some text file.
For example the hive is
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment\Path
and under path i need to take back up of values in some text file and then put some value in the registry after back is taken in text file.
Also how to read the text file values so that we can again write to registry hive back from the back up text file.
Your help is much appreciated.
Umeed4u

I think you need to read this first:
http://social.technet.microsoft.com/Forums/scriptcenter/en-US/a0def745-4831-4de0-a040-63b63e7be7ae/posting-guidelines?forum=ITCG
Don't retire TechNet! -
(Don't give up yet - 12,830+ strong and growing)

How do I read a text file in a Jar Executable?

Hello All,
I have a need to package a text file into a Jar Exectable file and then have my java code read that text file in using a BufferedReader. Can anyone out there tell me how to do this? My first question is how do I reference this file by the path name? O, I'm also using Windows.
Thanks for your help.
Karl

I have the same problem with kportner . I did by joop_eggen but I got the error at:
BufferedReader in = new InputStreamReader(is);Can't conver from BufferedReader to InputStreamReader
When I up my applet to server and get it from client. My applet couldn't read the text file.
Any one help me!
Thanks.

Reading a text file from a remote host. Authentication required.

Hi frnds,
I have to read a text file "config.txt" from a remote host "HOSTNAME". File is shared in a folder - "FOLDER" .
If the folder is shared with no password protection then it works. But if the folder is password protected the code is unable to read the file.
I know the UserName and PassWord of the shared folder. How to code for this.
I don't want to share the Folder to everyone without a password.
Kindly Help.
try {
FileReader fr=new FileReader("\\\\HostName\\folder\\config.txt");
BufferedReader br=new BufferedReader(fr);
String s=null;
while((s=br.readLine())!=null)
/* One line is read */
fr.close();
catch(Exception e)
throw new Exception("Exception in ConfigConstants."+e.toString());
urs
Mishra

ok.. let me define it clearly...
By using ftp as a protocol how can I read a text file
in remote machine........ kindly do reply....Have a look at this article:
http://www.javaworld.com/javaworld/jw-04-2003/jw-0404-ftp.html
and what are the prerequisities that are needed for
such a type of operation.....(At least) an FTP server should be running on the machine where the text file resides.
Message was edited by:
prometheuzz
Oh, you should have your keyboard fixed: the full stop key seems to be stuck, you have a lot of trailing ..... after each sentence.

From an Oracle form, I want to read a text file.

From an Oracle form, I want to read a text file. In the form on a button press I have:
declare
in_file Text_IO.File_Type;
linebuf VARCHAR2(1800);
filename VARCHAR2(30);
BEGIN
filename:=GET_FILE_NAME('U:\ora_devl\pps\work\a.txt', File_Filter=>'Text Files (*.txt)|*.txt|');
in_file := Text_IO.Fopen(filename, 'r');
LOOP
Text_IO.Get_Line(in_file, linebuf);
-- :text_item5:=:text_item5||linebuf||chr(10);
Text_IO.New_Line;
END LOOP;
EXCEPTION
WHEN no_data_found THEN
Text_IO.Put_Line('Closing the file...');
Text_IO.Fclose(in_file);
END;
It gets an ORA-302000. I suspect the problem starts with the GET_FILE_NAME because when I comment out everything but that, It processes endlessly never ending.
Forms [32 Bit] Version 11.1.1.3.0 (Production)
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
What can you tell me? Thanks

GET_FILE_NAME will try to open an "Open File" dialog on the server, which obviously can't happen. If you want to use that type of behavior you need to use WebUtil and the function CLIENT_GET_FILE_NAME. Example:
filename := CLIENT_GET_FILE_NAME('C:\', File_Filter=> 'Text Files (*.txt)|*.txt|All Files (*.*)|*.*|', dialog_type=> OPEN_FILE);Refer to the Builder Online help for more details. You can also refer to the demo which is available here:
http://www.oracle.com/technetwork/developer-tools/forms/downloads/index.html
More information here:
http://www.oracle.com/technetwork/developer-tools/forms/webutil-090641.html
Also, it appears that you are attempting to use a mapped drive ("U"). Although this can be made to work, it is not recommended and in some cases will not be supported. If you need access to remote files, you should use some other mechanism to bring the file to the local machine before manipulating it.

Where does this java program read a text file and how does it output the re

someone sent this to me. its a generic translator where it reads a hashmap text file which has the replacement vocabulary etc... and then reads another text file that has what you want translated and then outputs translation. what i don't understand is where i need to plugin the name of the text files and what is the very first line of code?
[code
package forums;
//references:
//http://forums.techguy.org/development/570048-need-write-java-program-convert.html
//http://www.wellho.net/resources/ex.php4?item=j714/Hmap.java
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.FileReader;
public class Translate {
public static void main(String [] args) throws IOException {
if (args.length != 2) {
System.err.println("usage: Translate wordmapfile textfile");
System.exit(1);
try {
HashMap words = ReadHashMapFromFile(args[0]);
System.out.println(ProcessFile(words, args[1]));
} catch (Exception e) {
e.printStackTrace();
// static helper methods
* Reads a file into a HashMap. The file should contain lines of the format
* "key\tvalue\n"
* @returns a hashmap of the given file
@SuppressWarnings("unchecked")
private static HashMap ReadHashMapFromFile(String filename) throws FileNotFoundException, IOException {
BufferedReader in = null;
HashMap map = null;
try {
in = new BufferedReader(new FileReader(filename));
String line;
map = new HashMap();
while ((line = in.readLine()) != null) {
String[] fields = line.split("\\t", 2);
if (fields.length != 2) continue; //just ignore "invalid" lines
map.put(fields[0], fields[1]);
} finally {
if(in!=null) in.close(); //may throw IOException
return(map); //returning a reference to local variable is safe in java (unlike C/C++)
* Process the given file
* @returns String contains the whole file.
private static String ProcessFile(Map words, String filename) throws FileNotFoundException, IOException {
BufferedReader in = null;
StringBuffer out = null;
try {
in = new BufferedReader(new FileReader(filename));
out = new StringBuffer();
String line = null;
while( (line=in.readLine()) != null ) {
out.append(SearchAndReplaceWordsInText(words, line)+"\n");
} finally {
if(in!=null) in.close(); //may throw IOException
return out.toString();
* Replaces all occurrences in text of each key in words with it's value.
* @returns String
private static String SearchAndReplaceWordsInText(Map words, String text) {
Iterator it = words.keySet().iterator();
while( it.hasNext() ) {
String key = (String)it.next();
text = text.replaceAll("\\b"+key+"\\b", (String)words.get(key));
return text;
* @returns: s with the first letter capitalized
String capitalize(String s)
return s.substring(0,0).toUpperCase() + s.substring(1);
}

without what arguments?Without any arguments. If there are no arguments, there are no arguments of any kind. If you have a zoo with no animals in it, it's not meaningful to ask whether the animals which are not there are zebras or elephants.
does it prompt me to give it a text file name?Apparently.
when i run it this is all i get:
usage: Translate wordmapfile textfile
Press any key to continue...Right. And "wordmapfile" is almost certainly supposed to be a file that holds the word map, and "textfile" is almost certainly the file of text that it's going to translate.

How to know they is space or carrier return when java read a text file.

Hi,
Please help.
How to know they is space or carrier return when java read a text file.
The reason is that. I want to use java for loop to read each part of value. for example: first part is the items name. After the space (I need to tell java when this is a space here and its need to skip) , following by the items prices in double value and space again (need to skip also) and etc.
item name1
item name2
item name3
item name4
item name5
<--- here is the space to skip and another loop to read following items prices
item price1
item price2
item price3
item price4
item price5
<--- here is another spcae again. and so on
thank in advance!

You can check to see if the sting you read in is just nothing, depending on how you're reading it in:
if((str = inStream.readLine().trim().equals("")))
// skip and get ready for the next section
else
// handle the next item
The trim() method gets rid of all leading and trailing spaces and I'm assuming you're using a stream that can use the readLine() method that returns a String.
I hope this is clear. Let me know if it isn't, I'll try and word it different, or post how you're reading the values in if you need more help.

How to i read multiple text files one bye one

hi all
I need to select the text files multiple times and read files one by one
some how i managed to select the one text file and scan the data in the text file
i need to do this for mutiple files at the same time
please help me
Solved!
Go to Solution.

gowthamggk wrote:
i sucessfully reading one text file through this VI
but as like this .. i need for multiple files
Why are you not using For loop???
gowthamggk wrote:
also shld read the text line by line
You can right click the 'Read from Text File' function and select 'Read Lines'. Refer to below code snippet.
I am not allergic to Kudos, in fact I love Kudos.
Make your LabVIEW experience more CONVENIENT.

Need help reading a text file!!!!

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