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.

Similar Messages

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.

Read multiple text files and sort them

I am trying to read multiple text files and store the data from the file in vector.
but for days. I am with no luck. anyone can help me out with it? any idea of how to sort them will be appreciated.
Below is part of the code I implemented.
public class packet {
    private int timestamp;
    private int user_id;
    private int packet_id;
    private int packet_seqno;
    private int packet_size;
    public packet(int timestamp0,int user_id0, int packet_id0,int packet_seqno0, int packet_size0)
        timestamp = timestamp0;
        user_id=user_id0;
        packet_id=packet_id0;
        packet_seqno=packet_seqno0;
        packet_size=packet_size0;
    public void setTime(int atimestamp)
        this.timestamp=atimestamp;
    public void setUserid(int auserid)
        this.user_id=auserid;
    public void setPacketid(int apacketid)
        this.packet_id=apacketid;
    public void setPacketseqno(int apacketseqno)
        this.packet_seqno=apacketseqno;
    public void setPacketsize(int apacketsize)
        this.packet_size=apacketsize;
    public String toString()
        return timestamp+"\t"+user_id+"\t"+packet_id+"\t"+packet_seqno+"\t"+packet_size+"\t";
}Here is the data from part of the text files. ( the first column is timestamp, second is userid, third is packetid.....)
0 1 1 1 512
1 2 1 2 512
2 3 1 3 512
3 4 1 4 512
4 5 1 5 512
5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512

Here's a standard idiom for object-list-sorting:
/* cnleafdata.txt *********************************************
0 1 1 1 512
1 2 1 2 512
2 3 1 3 512
3 4 1 4 512
4 5 1 5 512
5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512
import java.util.*;
import java.io.*;
public class Packet implements Comparable<Packet>{
private int timeStamp;
private int userId;
private int packetId;
private int packetSeqno;
private int packetSize;
public Packet(int timeStamp0, int userId0, int packetId0,
   int packetSeqno0, int packetSize0) {
    timeStamp = timeStamp0;
    userId = userId0;
    packetId = packetId0;
    packetSeqno = packetSeqno0;
    packetSize = packetSize0;
public Packet(String timeStamp0, String userId0, String packetId0,
   String packetSeqno0, String packetSize0) {
    this(Integer.parseInt(timeStamp0), Integer.parseInt(userId0),
     Integer.parseInt(packetId0), Integer.parseInt(packetSeqno0),
     Integer.parseInt(packetSize0));
public Packet(String[] a){
    this(a[0], a[1], a[2], a[3], a[4]);
public void setTime(int aTimeStamp){
    timeStamp = aTimeStamp;
public void setUserId(int aUserId){
    userId = aUserId;
public void setPacketId(int aPacketId){
    packetId = aPacketId;
public void setPacketSeqno(int aPacketSeqno){
    packetSeqno = aPacketSeqno;
public void setPacketSize(int aPacketSize){
    packetSize = aPacketSize;
public int getUserId(){
    return userId;
public String toString(){
    return String.format
("%2d %2d %2d %2d %4d", timeStamp, userId, packetId, packetSeqno, packetSize);
public int compareTo(Packet otherPacket){
    return userId - otherPacket.getUserId();
/* main for test */
public static void main(String[] args){
    String line;
    ArrayList<Packet> alp;
    alp = new ArrayList<Packet>();
    try{
      BufferedReader br = new BufferedReader(new FileReader("cnleafdata.txt"));
      while ((line = br.readLine()) != null){
        // if (! recordValid(line)){
        //   continue;
        String[] ar = line.split("\\s");
        alp.add(new Packet(ar));
    catch (Exception e){
      e.printStackTrace();
    System.out.println("[original]");
    for (Packet p : alp){
      System.out.println(p);
    System.out.println();
    Collections.sort(alp);
    System.out.println("[sorted by user ID]");
    for (Packet p : alp){
      System.out.println(p);
}

How to scan/ read a text file, pick up only lines you wanted.

I'm new to Labview, I trying to wire a VI which can read a text file
example below:
Example: My Text File:
1 abcd
2 efgh
8 aaaa
1 uuuu
and pick out only any line which start with number 1 (i.e 1 abcd)
then output these 2 lines out to a a new text file?
Thanks,
Palmtree

Hi,
How do you creat your text files? Depending on the programm, there is added characters in the beginning and at the and of the file. So here you will find a VI to creat "raw" text files.
To debug your VIs, use the probs and breakpoints, so you can solve the problem by your self or give an more accurate description of it.
There is also the VI that read a integer and two strings (%d %s %s)
Attachments:
creat text file.vi ‏9 KB
read_from_file.vi ‏14 KB

How can i read the text files and buffer the data in Vector?

hi. I have been running into this problem for days, but with no luck and losing right direction.
The problem is : I am trying to read a text file and buffer the data into a
Queue for each user.
the sample text file is as below:( 1st column is timestamp, 2nd is user_id, 3rd is packet_id, 4th is packet_seqno, 5th is packet_size)
0 1 1 1 512
1 2 1 2 512
2 3 1 3 512
3 4 1 4 512
4 5 1 5 512
5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512
17 8 2 18 512
18 9 2 19 512
19 10 2 20 512
20 1 3 21 512
21 2 3 22 512
22 3 3 23 512
23 4 3 24 512
24 5 3 25 512
25 6 3 26 512
26 7 3 27 512
27 8 3 28 512
28 9 3 29 512
29 10 3 30 512
30 1 4 31 512
31 2 4 32 512
32 3 4 33 512
33 4 4 34 512
34 5 4 35 512
35 6 4 36 512
36 7 4 37 512
37 8 4 38 512
38 9 4 39 512
39 10 4 40 512
40 1 5 41 512
41 2 5 42 512
42 3 5 43 512
43 4 5 44 512
44 5 5 45 512
45 6 5 46 512
46 7 5 47 512
47 8 5 48 512
48 9 5 49 512
49 10 5 50 512
50 1 6 51 512
51 2 6 52 512
52 3 6 53 512
53 4 6 54 512
54 5 6 55 512
55 6 6 56 512
56 7 6 57 512
57 8 6 58 512
58 9 6 59 512
59 10 6 60 512
60 1 7 61 512
61 2 7 62 512
62 3 7 63 512
63 4 7 64 512
64 5 7 65 512
65 6 7 66 512
66 7 7 67 512
67 8 7 68 512
68 9 7 69 512
69 10 7 70 512
70 1 8 71 512
71 2 8 72 512
What I wanna do is to read all the data above and buffer them in a queue for each user( there are only 10 users in total).
I already created a class called Class packet:
public class packet {
    private int timestamp;
    private int user_id;
    private int packet_id;
    private int packet_seqno;
    private int packet_size;
    /** Creates a new instance of packet */
    public packet(int timestamp,int user_id, int packet_id,int packet_seqno, int packet_size)
        this.timestamp = timestamp;
        this.user_id=user_id;
        this.packet_id=packet_id;
        this.packet_seqno=packet_seqno;
        this.packet_size=packet_size;
}then I wanna to create another Class called Class user which I can create a queue for each user (10 users in total) to store type packet information. the queue for each user will be in the order by timestamp.
any idea and sample code will be appreciated.

Doesn't sound too hard to me. Your class User (the convention says to capitalize class names) will have an ArrayList or Vector in it to represent the queue, and a method to store a Packet object into the List. An array or ArrayList or Vector will hold the 10 user objects. You will find the right user object from packet.user_id and call the method.
Please try to write some code yourself. You won't learn anything from having someone else write it for you. Look at sample code using ArrayList and Vector, there's plenty out there. Post in the forum again if your code turns out not to behave.

How can I read a text file??

Hi every body, does any boody has a code for read a text file and show this text in a JTextArea??? I'm trying with a FileReader but the text doesn't appear well.
Thanks in advance.
Juan

File f = new File("file.txt");
try
LineNumberReader inputFile = new LineNumberReader(new FileReader(f));
while((line = inputFile.readLine()) != null)
results += line + "\r\n";
inputFile.close();
catch(Exception ex)
System.err.println("Exception caught " + ex);
ex.printStackTrace();
area.setText(results); //textarea declared somewhere else

How can I read only text files in a directory.

I've written a program to read files in a directory but I'd like for it to only read the text files of that directory.
import java.io.*;
public class Data {
public static void main(String[] args) throws IOException {
String target_dir = "C:\\files";
File dir = new File(target_dir);
File[] files = dir.listFiles();
for (File textfiles : files) {
if (textfiles.isFile()) {
BufferedReader inputStream = null;
try {
inputStream = new BufferedReader(new FileReader(textfiles));
String line;
while ((line = inputStream.readLine()) != null) {
System.out.println(line);
} finally {
if (inputStream != null) {
inputStream.close();

You have mentioned you want to read only text files.
If you are referring to some specific set of extentions, you can filter based on that.
ex: you want to read only .txt files, you can add an if condition as below :
if(textfiles.getName().endsWith(".txt")) {
// Add your code here
Cheers
AJ

Reading multiple text files and writing them to one text file

Hi,
I'm trying to read a number of text files and write them to a single master file. My program reads all the files but only writes the last one to the master file.
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
// Input/Output Classes
import java.util.Scanner;
import java.io.PrintWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import java.awt.GridLayout;
public class Actor implements ActionListener
public static String DataRoot = "I:\\JAVA\\UBP\\DAT
public static JFrame SW = new JFrame();
public static JTextField txtSPath;
public static JTextArea txtTable;
public void actionPerformed( ActionEvent e )
String Command = e.getActionCommand();
if (Command.equals("Process") )
SetupWin();
ProcessAll();
public void SetupWin()
SW.setTitle("void");
SW.setSize(300,400);
SW.setLayout(new GridLayout(6,1));
txtSPath = new JTextField(40);    SW.add(txtSPath);
txtTable = new JTextArea(10, 40); SW.add(txtTable);
SW.setVisible(true);
public void ProcessAll()
Process("Dunstable","Finance");
Process("Dunstable","Production");
Process("Dunstable","Sales");
public void Process(String Town, String Dept)
String SPath = DataRoot + Town + "
" + Dept + ".txt";
String MPath = DataRoot + "masterFile" + ".txt";
txtSPath.setText(SPath);
String message = "Trying " + SPath;
System.out.println(message);
String SlaveTable=message;
try// if following fails an exception is thrown
Scanner Slave = new Scanner(new FileInputStream(SPath)); // reads slave file
PrintWriter outputStream = null;
outputStream = new PrintWriter(new FileOutputStream(MPath));
while ( Slave.hasNextLine() ) // reads text line by line
//Read and output next record
String PartRecord = Slave.nextLine();
String FullRecord = Town + " " + PartRecord;
System.out.println(FullRecord);
outputStream.println(FullRecord);
Slave.close();
outputStream.close();
txtTable.setText(SlaveTable);
//An Exception Error would be THROWN by above & CAUGHT below
catch(FileNotFoundException e)
message = "Could Not Find " + SPath;
System.out.println(message);     //console
txtSPath.setText(message);     //window
catch(IOException e)
System.out.println("Slave I/O Problem " + SPath);
}Edited by: Ardour on Mar 4, 2008 1:53 PM

I haven't looked closely, but my spidey sense tingles at this:
new FileOutputStream(MPath)This will clobber (erase) the previous contents of the file. Open in append mode:
new FileOutputStream(MPath, true)Of course, if the file exists before you run this code, you will end up append to the original contents. If that is not wanted, consider using File's delete method first.

How do I create multiple text files from a list in another file?

I have a text file with data in it:
1. Bristol
2. Bath
3. Exeter
etc
I want to run an action which outputs the following files:
1.txt (contents: 1 Bristol)
2.txt (contents: 2.Bath)
3.txt (contents: 3.Exeter)
I can't work ou how to do this, any help appreciated. Thanks
Dave

Hi mate, thanks for the suggestion. I saw that section in the user guide - but it is only for copying from one library to another - I want to copy from an FCP library to a file structure OUTSIDE FCP. I have had problems with FCP losing media when copying to another library so I just want the files in the Finder where I can see them...
Stephen

Read multiple text files

Hi everyone out there,
I would like to know how to read multiple files from same directory, but files hve different name, using java. Any help is appreciate, need asap..
Thnx,

I want to process all the files that are in the
folder. Okay. This is the critical piece of information that you hadn't provided previously.
And you saying using loop? how do you propose
using loop for this?There are two different tasks: Identifying all the files, and processing each of them.
You definitely need a loop for processing them. That's what loops are for--doing the same thing multiple times.
You might or might not use a loop to identify the files.
I see two main possible approaches:
1) Provide the list of files as command line args when you start the VM, using your command shell's wildcard/globbing: java MyClass * Then inside your code: public static void main(String[] args) {
    for (int ix = 0; ix < args.length; ix++) {
        String fileName = args[ix];
        // process it
} 2) Provide your class with the name of the directory you want to process (for instance as a command line arg). Create a java.io.File instance that corresponds to that directory. File has methods that list the files inside a diretory. Use that to get a list of the files, and run through that list.

How do I read a text file line by line and store to array

I have a text file, I want to be able to store each line of the file in an array, how would I go about doing this? code example? tutorial? Thank you

Well, you got the pseudo code:
a) read line
b) add to array
So whats the problem? What don't you know how to do?
What does your text book tell you about reading files. I'm sure it has an example, every book I've read does.
By the way I would use an ArrayList to store each line of text, that way you don't need to know in advance.

How to I read a text file attachment in email on my playbook

I can read it on my black berry smartphone, I have a program that will read text files but it can not see into wherever email attachments are saved.
I get log files in emails and the phone screen is a bit small to read them so I would like to use my playbook.
Any ideas.

Attachments are saved in your downloads folder:
/accounts/1000/shared/downloads
You might like to try Files & Folders, which gives you access to that folder and has a built-in text viewer.
Files & Folders, the unified file & cloud manager for PlayBook and BB10 with SkyDrive, SugarSync, Box, Dropbox, Google Drive, Google Docs. Free 3-day trial! - Jon Webb - Innovatology - Utrecht, Netherlands

How do i read a text file and then display the content as a string

I also would like to strip the string from a certain substring and convert the remaining string into an array of floating point numbers. I was thinking of using the read from spreadsheet vi but I'm not exactly sure if that is going to work. Any help would be greatly appreciated.
Solved!
Go to Solution.

Here is what I have so far. What I am trying to do is to display the text file as a string and then strip the "curve" from the text file. I think I did this successfully. Now I want to convert the remaining string into an array of floating point numbers, and display the numbers into an array and on a waveform graph.
Attachments:
hw3datafile.txt ‏1 KB
Q4.vi ‏7 KB

How can I read a text file inside the .xsjs?

I need to read line by line of a text file just like FileReader and BufferedReader in Java. It contains a script SQL to insert data in my DB. Can I use some API?

There is no API that allows you to access the file system of the server in XSJS. You would need to upload the file from the client side and it will appear as a array buffer in the request object. From there you can convert the array buffer to a string and process however you like.
For example:
var content = "";
    content = $.request.body.asArrayBuffer();
    var array = new Uint8Array(content);
    var encodedString = String.fromCharCode.apply(null,array),
         decodedString = decodeURIComponent(escape(encodedString));
        content = decodedString;
    var lines = content.split(/\r\n|\n/);

How can I combine multiple text files into a single, alphabetized list?

I have many, many lists of song titles. Each in its own textedit file. There is tons of overlap and duplication. I want to make a master list that has every song listed.
If I could somehow just merge them all and alphabetize the lines, I could manually get rid of duplicates fairly easily.
I have Tiger. Don't know if I have any application that would help. I probably don't want to buy an application, though, because I suspect I may not be able to stick with Tiger much longer.
I appreciate any tips you can give me.
Thanks a lot,
Bruce

Hi Bruce, Tex-Edit Plus for OS X...
http://www.tex-edit.com/
It can Merge files then Sort them easily, even has a remove duplicate lines script available.
If the version you get doesn't have the sort perchance, here's a link, put sort in the search scripts box, get the second one, Sort Selection...
http://dougscripts.com/texedit/

How to i read multiple text files one bye one

Similar Messages

Maybe you are looking for