Read a text file and populate table

My email addres is [email protected]
I am new to java. My project requires me to read a text file and pick some values from the text file and populate a table in MS Access. The main fields are from the TEXT. Some of the columns to be read are:
Transaction ref.
Amount
User ref.
Date
The text file is as follows:
Receiver =
FBNINGLAXXX LT : A
FST BANK OF NIGERIA PLC
LAGOS
LAGOS
NG
NIGERIA
Transaction ref. = SPLOUK01P0008888 Related ref. = 00077003
Amount = 16675750, NGN Value/Date =
Format & Validation
Version = 0205 Checked = Minimum
Netw. Appl. = FIN Passed = Minimum
Sender to Receiver Instructions
Banking Prior. = User ref. = SPLOUK01P0008888
Warning Status =
Possible Duplicate Emission
Appl/Serv = SWIFT Interface
RP & Ft = SIfrom_SWIFT
Date/Time = 01/04/03 18:53:19
Text =
:20:SPLOUK01P0008888
:28D:1/1
:30:030401
:21:00077003
:32B:NGN16675750,00
:50H:/4072010014877
SPDC FBN East Main A/C
:57D:WEMA BANK PLC
PLOT 22 TRANS-AMADI BRANCH P.H.
PORT HARCOURT.
RIVERS STATE.
:59:/0421002101818
PROJECT MASTERS NIGERIA LTD.
C101 ELIOGBOLO VILLAGE OFF
EAST-WEST ROAD RUMUOKORO PORT HAR
COURT
:70:PM PCE-TS 03 001030226
:71A:OUR
Block 5:
{MAC:9F664844}{CHK:60EF6513E579}
Message History =
*Original (Completed)

See in this case as you are dealing with Files and database. you need read the File by using the I/O Streams. if you have to select some particular values you can go Random access file.Once you have retrived values. You can go for the second part that is make a jdbc connection to database, and use simple SQL statements to populate those values into the table.
How this will give you a better picture

Similar Messages

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.

Issue : Read a text file and print the same

Hi, My requirement is to read a text file and print it the same way.
import java.io.BufferedReader;
import java.io.FileReader;
public class CatFile {
public static void main(String[] args) throws Exception
     FileReader file = new FileReader("D:/Test/Allfiles.txt");
     BufferedReader reader = new BufferedReader(file);
     String text = "";
     String line = reader.readLine();
     while (line != null)
          text += line;
          line = reader.readLine();
     System.out.println(text);
The text file i used contains
A
B
C
but my output is ABC.
What change should be made to print it the same way in the txt file ?

Hi EJP,
I modified the code based on your suggestion and now its working as expected. Thanks
Modified code :
import java.io.BufferedReader;
import java.io.FileReader;
public class CatFile {
public static void main(String[] args) throws Exception
     FileReader file = new FileReader("D:/Test/Allfiles.txt");
     BufferedReader reader = new BufferedReader(file);
     String text = "";
     String line = reader.readLine();
     while (line != null)
          System.out.println(line);
          line = reader.readLine();
          text += line;
}

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);
}

Reading a text file and putting it in a textarea

hi can u tell me how to read a text file and display the contents in a text area using jsp please?
thanks :o)

<%@ page import="java.sql.*, java.io.*" %>
<HTML>
<HEAD>
<TITLE>User Application Area</TITLE>
<SCRIPT LANGUAGE="javascript" SRC="cal2.js">
</SCRIPT>
<SCRIPT LANGUAGE="javascript" SRC="cal_conf2.js"></SCRIPT>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:fypproject","","");
Statement st = con.createStatement();
String email = (String)session.getAttribute("email");
String levelStatus = (String)session.getAttribute("levelStatus");
String details = "SELECT PD.Forename, PD.Surname, L.Level_Name FROM Personal_Details PD,
Login_Details LD, Levels L WHERE PD.Email_Address = '" + email + "' AND PD.Email_Address =
LD.Email_Address AND LD.Level_ID = '" + levelStatus + "' AND LD.Level_ID = L.Level_ID";
ResultSet rsDet = st.executeQuery(details);
if(rsDet.next()) {
String forename = rsDet.getString("Forename");
String surname = rsDet.getString("Surname");
String levelName = rsDet.getString("Level_Name");
%>
<DIV ALIGN="center"><H1>User Application Arena</H1></DIV>
<BR>
<H4>Welcome back <% out.println(forename + " " + surname); %> </H4>
<BR>
Your status is:
<FONT COLOR = "red">
<% out.println(levelName); %>
</FONT>
<BR>
<%
if(levelStatus.compareTo("0")==0) {
%>
<BR>
<DIV ALIGN="center">
Please come back later and re-check your status to see if your application has progressed. If it has
been more than a week since you submitted it please phone the HR department on 020 7123 4567
<BR><BR>
Log Out
</DIV>
</FORM>
<%
else if(levelStatus.compareTo("1")==0) {
%>
<FORM NAME="sampleform" ACTION="ProcessInterview.jsp">
<DIV ALIGN="center">
Congratulations, we would like to invite you for a First Round tests and interview. Please select a
date that would suit you on our online calendar below
<BR><BR>
<SMALL>PLEASE CLICK HERE TO SELECT A DATE</SMALL>
<BR><BR>
<INPUT TYPE="text" NAME="firstinput" SIZE=20>
<BR><BR>
<INPUT TYPE="submit" VALUE="Confirm">
</DIV>
</FORM>
<%
else if(levelStatus.compareTo("2")==0) {
%>
<FORM NAME="sampleform" ACTION="ProcessInterview.jsp">
<DIV ALIGN="center">
Congratulations, we would like to invite you for a Second Round interview. Please select a date that
would suit you on our online calendar below
<BR><BR>
<SMALL>PLEASE CLICK HERE TO SELECT A DATE</SMALL>
<BR><BR>
<INPUT TYPE="text" NAME="firstinput" SIZE=20>
<BR><BR>
<INPUT TYPE="submit" VALUE="Confirm">
</DIV>
</FORM>
<%
else if(levelStatus.compareTo("3")==0) {
File inFile = new File("offer.txt");
StringBuffer sb = new StringBuffer();
BufferedReader buf = new BufferedReader(new FileReader(inFile));
while (buf.ready()) {
sb.append(buf.readLine());
buf.close();
%>
<TEXTAREA NAME ="text" ROWS="10" COLS="60">
<%= sb.toString() %>
</TEXTAREA>
<%
else if(levelStatus.compareTo("4")==0) {
out.println("send rej email");
st.close();
con.close();
%>
</BODY>
</HTML>
THANKS!! :o)

Reading a text file and transferring values into array

Hi,
I have a problem. So what I am trying to do is that, I read a text file and insert specific values from the text file into an array for future needs.
But I have to make sure that there is no duplicate entries. So thats what I have but, my method takes forever to finish...
here is my code:
String nomFichier = "Test_" + numTest + "_" + date + ".txt";
        String ligne = "";
        int z = 0;
        int j = 0;
        BufferedReader lecteurFichier = new BufferedReader(new FileReader(nomFichier));
        while ((ligne = lecteurFichier.readLine()) != null) {
            if (z > 3)
                String valeur = "";
                String dist = "";
                boolean unique = true;
                String [] chiffre = ligne.split(";");
                 if (intervalleAnalyser == 1)
                    valeur = chiffre[3];
                    dist = chiffre[4];
                if (intervalleAnalyser == 2)
                    valeur = chiffre[2];
                    dist = chiffre[4];
                if (intervalleAnalyser == 3)
                    valeur = chiffre[1];
                    dist = chiffre[4];
                if (z == 4) {
                    intervalleDiagramme[j] = valeur;
                    j++;
                if (z > 4) {
                    for (int i = 0; i < intervalleDiagramme.length; i++)
                         for (int x = 0; x < i; x++)
                             if(intervalleDiagramme[i] == intervalleDiagramme[x])
                                unique = false;
                    if (unique)
                        intervalleDiagramme[j] = valeur;
                    j++;
            z++;
        lecteurFichier.close(); // toujours fermer le fichier

Hi,
Thanks for your reply,
1) Yeah I have a method that asks the question and assigns it to a variable.
2) Well the z will stop once there is no lines to read no?
for the set.add(), I am not that familar...
I changed bit a code and I have this now:
if (z > 4) {
                    for (int i = 0; i < intervalleDiagramme.length; i++)
                        System.out.println(intervalleDiagramme);
if(intervalleDiagramme[i].equals(valeur))
System.out.println(intervalleDiagramme[i] + " " + valeur);
unique = false;
if (unique)
intervalleDiagramme[j] = valeur;
EDIT:
I figured a way to assign " " to all the values in my array. But I get this error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 380
at TP3.lireFichier(TP3.java:305)
And my line 305 is: intervalleDiagramme[j] = valeur;
EDIT2:
So ok I found my mistake and corrected it. But I want to know is there a way of doing this without setting the size of the array? because sometimes there needs to be 21 values sometimes 19 and sometimes 20....
If I take out: = new String [21] out I get a NullPointer error...
Edited by: Ara1992Habs on Dec 13, 2009 7:29 AM
Edited by: Ara1992Habs on Dec 13, 2009 7:37 AM

How to read the contents of a text file and populate the data in a table ?

Hello All,
Can anyone advise on how to acheieve the above ? I am trying to read in a text file (CSV) and have the contents populated to the respective UI elements in a table. Any help is greatly appreciated.
from
Kwok Wei

Hi,
Let us consider you have list of names(Seperated by delimeter) in a text file and you want to display in a table.
1. Create Context Node "Names" and context attribute "Name"
2. Create Table and bind to the above context.
3.Write the following code in the "Init method.
try{
FileReader f =new FileReader("");
BufferedReader r=new BufferedReader(f);
String names=r.readLine();
Vector Names=new Vector();
// Use Tokenizer and store all the names i a vector//
for(int i=0;i<Names.size();i++){
IPrivate<<VieName>>.INameElement ele=wdContext.createNameElement();
ele.set<<Name>>( Names.get(i).toString());
wdContext.NodeName().addElement(ele);
Regards, Anilkumar
Message was edited by: Anilkumar Vippagunta

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,

Read from text file and seperate column

hello,
I have a problem reading my text file. This text file is downloaded from weather link. All data will be changed upon the selection of user. my problem is I can read the data column by column but i cannot retrive the right column header for each data. I also attached the test file. Can somebody help me? Thanks in advance..
Attachments:
download.txt ‏8 KB
read text file.JPG ‏11 KB
read data.JPG ‏43 KB

Hi
Sorry, I missed that one. The file formatting is strange though. It uses spaces to separate columns but also within columns. I attached a modified VI that tries to take care of that, but it fails at the columns "Solar Energy" and "Hi Solar Rad.". This is very difficult to read programmatically as there's one space each between "Solar", "Hi", and "Solar" again. So how do we distinguish between column separator and space within column?
Is download.txt the original file? Or was it probably modified by an editor that would replace tabs by space characters?
Attachments:
test-mod-2.vi ‏11 KB

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.

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 to read a text file and write text file

Hello,
I have a text file A look like this:
0 0
0 A B C
1 B C D
2 D G G
10
1 A R T
2 T Y U
3 G H J
4 T H K
20
1 G H J
2 G H J
I want to always get rid of last letter and select only the first and last line and save it to another text file B. The output should like this
0 A B
2 D G
1 A R
4 T H
1 G H
2 G H
I know how to read and write a text file, but how can I select the text when I am reading a text file. Can anyone give me an example?
Thank you

If the text file A look like that
0 0
0 3479563,41166 6756595,64723 78,31 1,#QNAN
1 3479515,89803 6756588,20824 77,81 1,#QNAN
2 3479502,91618 6756582,6984 77,94 1,#QNAN
3 3479516,16334 6756507,11687 84,94 1,#QNAN
4 3479519,14188 6756498,54413 85,67 1,#QNAN
5 3479525,61721 6756493,89255 86,02 1,#QNAN
6 3479649,5546 6756453,21824 89,57 1,#QNAN
1 0
0 3478762,36013 6755006,54907 54,8 1,#QNAN
1 3478756,19538 6755078,16787 53,63 1,#QNAN
2 0
3 0
N 0
I want to read the line that before and after 1 0, 2 0, ...N 0 line to arraylist. I have programed the following code
public ArrayList<String>save2;
public BufferedWriter bufwriter;
File writefile;
String filepath, filecontent, read;
String readStr = "" ;
String[]temp = null;
public String readfile(String path) {
int i = 0;
ArrayList<String> save = new ArrayList <String>();
try {
filepath = "D:\\thesis\\Material\\data\\CriticalNetwork\\test3.txt";
File file = new File(filepath);
FileReader fileread = new FileReader(file);
BufferedReader bufread = new BufferedReader(fileread);
this.read = null;
// read text file and save each line content to arraylist
while ((read = bufread.readLine()) != null ) {
save.add(read);
// split each arraylist[i] element by space and save it to String[]
for(i=0; i< save.size();i++){
this.temp = save.get(i).split(" ") ;
// if String[] contain N 0 such as 0 0, 1 0, 2 0 then save its previous and next line from save arraylist to save2 arraylist
if (temp.equals(i+"0")){
this.save2.add(save.get(i));
System.out.println(save2.get(i));
} catch (Exception d) {
System.out.println(d.getMessage());
return readStr;
My code has something wrong. It always printout null. Can anyone help me?
Best Regards,
Zhang

Reading a text file and connecting two server

Hi,
I am newbie at java and I have two question ,
asume you have two server and a client. every server reads its own text file and the client connect both of them and read output data, and counts number of words. you must use socket programming to communicate to servers.
I need litle code.
Thanks for your help

Hi,
While using ArrayList, use add your elements into it
as an object subtype if you do not specify ArryList
certain type.
But recall that if you use certain
type(ArrayList<String>,....), you do not add any
other different type element.What the heck is this all about Merde?

Using servlets to read from text file and insert data

Hi,
Can I use a servlet to read from a space delimited text file on the client computer and use that data to insert into a table in my database? I want to make it easy for my users to upload their data without having to have them use SQL*Loader. If so can someone give me a hint as how to get started? I appreciate it.
Thanks,
Colby

Create a page for the user to upload the file to your webserver and send a message (containing the file location) to a server app that will open the file, parse it, and insert it into your database. Make sure you secure the page.
or
Have the user paste the file into a simple web form that submits to a servlet that parses the data and inserts it into your db.

How to Read the "text file and csv file" through powershell Scripts

Hi All
i need to add a multiple users in a particular Group through powershell Script how to read the text and CSV files in powershell
am completly new to Powershell scripts any one pls respond ASAP.with step by step process pls
Regards:
Rajeshreddy.k

Hi Rajeshreddy.k,
To add multiple users to one group, I wouldn't use a .csv file since the only value you need from a list is the users to be added.
To start create a list of users that should be added to the group, import this list in a variable called $users, the group distinguishedName in a variable called $Group and simply call the ActiveDirectory cmdlet Add-GroupMember.
$Users = Get-Content -Path 'C:\ListOfUsernames.txt'
$Group = 'CN=MyGroup,OU=MyOrg,DC=domain,DC=lcl'
Add-ADGroupMember -Identity $Group -Members $Users

Read a text file and populate table

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