Reading and Writing to a Text File

Hello all,
I was wondering if it is possible to write from forms to a text file and if possible what is the best way to do it.
Thanks,
Bucky

Use the TEXT_IO built-in functionality in forms or from the database utl_file. TEXT_IO seems to be more flexible because you can read and write to any server/directory you have access to whereas UTL_FILE is limited to the server where the database is located. Hope this helps.
Mike

Similar Messages

Reading and writing to a text file from an Applet

I'm a novice java programming with very little formal programming training. I've pieced together enough knowledge to do what I've wanted to do so far...
However, I've been unable to figure out how to read and write to a text file from an Applet (I can do it from a normal java program just fine). Here is a simple example of what I'd like to do (you can also look at it on my website: www.stat.colostate.edu/~leach/test02/test02.html). I know that there is some problem with permission/security but I'm not smart enough to understand what the error messages are telling or understand the few books I have. If anyone can tell me how to get this applet to work, or direct me to some referrences that would help me out I'd really appreciate it.
Thanks,
Andy
import java.applet.Applet;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
public class test02 extends Applet {
public Button B_go;
public GridBagConstraints c;
public void init() {
this.setLayout(new GridBagLayout());
c = new GridBagConstraints();
c.fill = GridBagConstraints.BOTH;
B_go = new Button("GO");
c.gridx=1; c.gridy=0; c.gridwidth=1; c.gridheight=1;
c.weightx = c.weighty = 0.0;
B_go.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
print_stuff();
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
this.add(B_go,c);
public static void print_stuff() {
try{
File f = new File("test02.txt");
PrintWriter out = new PrintWriter(new FileWriter(f));
out.print("This is test02.txt");
out.close();
}catch(IOException e){**/}
}

I have almost the exact same problem, and I am in the same situation as you are with respects to the language.
I am simply trying to create a file and output some garbage to it but my applet always spits back a security violation. I've tried eliminating the restrictions on the applet runner I use but I still get the error.
My method:
debug = new Label() ;
debug.setLocation( 20, 20 ) ;
debug.setSize( 500, 15 ) ;
add( debug ) ;
// output
try
     OutputStream file = new FileOutputStream( new File( "" + getCodeBase() + "output.txt" ) ) ;
     byte[] buffer = { 1, 2, 3, 4, 5 } ;
     file.write( buffer ) ;
     file.close() ;
} catch( Exception e )
     debug.setText( e.toString() ) ;
     Can anyone tell why this isnt working?

Reading and Writing from a text file at the same time

I know who to use the Scanner and PrintWriter to read from and write to a .txt file. But these are limited. How can I read and write at the same time? Such as open a file and change every third character or change every second word to something else and then write it back. I found this [http://java.sun.com/docs/books/tutorial/essential/io/|http://java.sun.com/docs/books/tutorial/essential/io/] but its a little over my head. Is this the only way to do it?

wrote:
You are using buffered reads and writes I would assume, right? Also, how do you think most programs handle this sort of thing? I don't believe I'm using buffering.
My code looks something like this
//...necessary imports
//then
Scanner inFile = new Scanner (new file("filename1.txt"));
PrintWriter outFile = new PrintWriter ("filename2.txt");
//then stuff like
int x = inFile.hasNextInt();
outFile.println(x);
camickr wrote:If you are changing the data "in place", that is none of the data in the file is shifted, then you can use a RandomAccessFile.
Otherwise, you've been given the answer above.What is RandomAccessFile? Is it what I have a link to? Basically what I do is I write a bunch of numbers to a txt file and then change the numbers I don't need anymore to 0. So say I had 0 1 2 3 4 5 6 7 etc. I would like to to open the txt file and change every second one to 0 so then I'd have only odd numbers and 0s.
I looked at the documentation for RandomAccessFile and it seems like it might be what I need.
Thankyou both for your help so far. I took a java course in high school and they only taught me one way to get data from text files and that is what I just showed you. So maybe this questions are really stupid. lol
Edited by: qw3n on Jun 13, 2009 7:46 PM

Reading and Writing to a Log file

Hello,
I'm writing a class that will write a user id to a log file every time they click on a particular button. However, I don't want a new line every time a user clicks on the button, I'd like to be able to find their id in the log, increment a counter and write that back to the log in place of the previous entry.
For example, User A clicks on the button for the first time so I write in the log:
User A 1
Next time they come along, I want to see if User A exists in the log - which they do - add 1 to the counter and replace User A 1 with User A 2. So the log will now say:
User A 2
I was thinking of writing to the log, reading the log back in to a HashMap and then writing the HashMap out every time. Seems like a rather inefficient solution. Is there anything else I can do?
Thanks!

Hi,
counters are a standard topic. Many solutions are to be found in
textbooks. Here is one of them (Hunter & Crawford Java Servlet
Programming):
String activeUser = ... ;
try
FileReader fileReader = new FileReader( "mylog" );
BufferedReader bufferedReader = new BufferedReader(fileReader);
FileWriter fileWriter = new FileWriter("mylog.new");
BufferedWriter bufferedWriter = new BufferedWriter( fileWriter );
String line;
String user;
String count;
while((line = bufferedReader.readLine() != null )
    StringTokenizer tokenizer = new StringTokenizer( line );
    if( tokenizer.countTokens != 2 ) continue; // bogus line
    user = tokenizer.nextToken;
    if( activeUser.equals( user ) )
      count = tokenizer.nextToken;
      bufferedWriter.write(user+" "+(Integer.parseInt(count)+1)+"\n" );
    else
      bufferedWriter.write( line );
bufferedWriter.close();
fileWriter.close();
bufferedReader.close();
fileReader.close();
File oldLog = new File("mylog");
File newLog = new File("mylog.new");
newLog.renameTo(oldLog);
catch( Exception e )
    // do whatever appropriate
}Have fun,
Klaus

High Score Table: Writing a Simple Text File with Flash and PHP

I am having a problem getting Flash to work with PHP as I need Flash to read and write to a text file on a server to store simple name/score data for a games hi score table. I can read from the text file into Flash easily enough but also need to write to the file when a new high score is reached, so I need to use PHP to do that. I can send the data from flash to the php file via POST but so far it is not working. The PHP file is confirmed as working as I added an echo to the file which displayed a message so I could check that the server was running PHP - the files were also uploaded to a remote server so I could test them properly. Flash code is as follows:
//php filewriter
var myLV = new LoadVars();
function sendData() {
//sets up variable 'hsdata' to send to php
myLV.hsdata = myText;
myLV.send("hiscores.php");
I believe this sends the variable 'myText' to the php file as a variable called 'hsdata' which I want the php file to write into a text file. The mytext variable is just a long string that has all the scores and names in the hiscore. OK, XML would be better way of doing this but for speed I just want to get basic functionality working, so storing a simple text sting is adequate for now. The PHP code that reads the Flash 'hsdata' variable and writes it to the text file 'scores.txt' follows:
<?php
//assigns to variable the data POSTed from flash
$flashdata = $_POST["hsdata"];
//file handler opens file and erases all contents with w arg
$fh = fopen("scores.txt","w");
//adds data to file
fwrite ($fh,$flashdata);
//closes file
fclose ($fh);
echo 'php file is working';
?>
Any help with this would be greatly appreciated - once I can get php to write simple text files I should be ok. Thanks.

Thanks for your help.
I have got Flash working to a certain extent with PHP using loadVars but have been unable to get flash to receive a variable declared in PHP. Here's my Flash code:
var outLV = new LoadVars();
var inLV = new LoadVars();
function sendData() {
outLV.hsdata = "Hello from Flash";
outLV.sendAndLoad("http://www.mysite.com/hiscores/test23.php",inLV,"post");
inLV.onLoad = function(success) {
if (success) {
//sets dynamic text box to show variable sent from php
statusTxt.text = phpmess;
} else {
statusTxt.text = "No Data Received";
This works ok and the inLV.onLoad function reports that it is receiving data but does not display the variable received from PHP. The PHP file is like this:
<?php
$mytxt =$_POST['hsdata'];
$myfile = "test23.txt";
$fh = fopen($myfile,'w');
//adds data to file
fwrite($fh, $mytxt);
//closes file
fclose ($fh);
$mess = "hello there from php";
echo ("&phpmess=$mess&");
?>
The PHP file is correctly receiving the hsdata from flash and writing it to a text file, but there seems to be a problem with the final part of the code which is intended to send a variable called 'phpmess' back to Flash, this is the string "hello there from php". How do I set up Flash and PHP so that PHP can send a variable back to Flash using echo? Really have tried everything but am totally baffled. Online tutorials have given numerous different syntax configurations for how the PHP file should be written which has really confused me - any help would be greatly appreciated.

How to read and write data from json file from windows phone7 app

Hi
I am developing wp7 app for the use of students my questions are
How can i write a code to read and write the json/text file for the wp7.
I am using windows 7 OS, VS 2010 Edition.
This is my code below:
xaml:
<Grid>
                    <TextBlock Height="45" HorizontalAlignment="Left" Margin="7,18,0,550" Name="textBlock1" Text="Full
Name: " />
                    <TextBox Width="350" Height="70" HorizontalAlignment="Left" Margin="108,1,0,0" Name="txtName"
Text="Enter your full name" VerticalAlignment="Top" />
                    <TextBlock Height="45" HorizontalAlignment="Left" Margin="6,75,0,0" Name="textBlock2" Text="Contact
No: " VerticalAlignment="Top" />
                    <TextBox Width="350" Height="70" HorizontalAlignment="Left" Margin="108,61,0,480" Name="txtContact"
Text="Enter your contact number" MaxLength="10" />
                    <Button Content="Register" Height="72" HorizontalAlignment="Left" Margin="10,330,0,0" Name="btnRegister"
VerticalAlignment="Top" Width="190" Click="btnRegister_Click" />
                </Grid>
xaml.cs:
private void btnRegister_Click(object sender, RoutedEventArgs e)
            string name, contact;
            name = txtName.Text;
            contact = txtContact.Text;
            try
                if (name != "" && contact != "")
                    string msg = name + " " + contact;
                    MessageBox.Show(msg);
                    Student stud = new Student
                        Name= name,
                        Contact = contact,
                    string jsonString = JsonConvert.SerializeObject(stud);
                    MessageBox.Show(jsonString);
                else
                    MessageBox.Show("Input Proper Information", MessageBoxButton.OK);
            catch (Exception ex)
                MessageBox.Show(ex.Message);
I have download NewtonSoft.json version 5.0.8.
So, I am able to convert input data into json format, but how can I able to write and read this data from a json/text file.
How can I do?
Thank you in adv and please, reply soon.

We don't have many samples left for Windows Phone 7 + Azure, the closest one to what you want to do is probably:
Using Local Storage with OData on Windows Phone To Reduce Network Bandwidth
this sample uses the local database feature: 'LINQ to SQL', available to Windows Phone 7.1 and 8.0 Silverlight applications, instead of simple file storage but even if you choose to stick with simple file storage I believe you should be able to adapt the
networking related portions of the sample to your particular application.
Eric Fleck, Windows Store and Windows Phone Developer Support. If you would like to provide feedback or suggestions for future improvements to the Windows Phone SDK please go to http://wpdev.uservoice.com/ where you can post your suggestions and/or cast
your votes for existing suggestions.

Need Help: UTL_FILE Reading and Writing to Text File

Hello I am using version 11gR2 using the UTL_FILE function to read from a text file then write the lines where it begins with word 'foo' and end my writing to the text file where the line with the word 'ZEN' is found. Now, I have several lines that begin with 'foo' and 'ZEN' Which make for one full paragraph, and in this paragraph there's a line that begins with 'DE4.2'. Therefore,
I need to write all paragraphs that include the line 'DE4.2' in their beginning and ending lines 'foo' and 'ZEN'
FOR EXAMPLE:
FOO/234E53LLID
THIS IS MY SECOND LINE
THIS IS MY THIRD LINE
DE4.2 THIS IS MY FOURTH LINE
THIS IS MY FIFTH LINE
ZEN/DING3434343
FOO/234E53LLID
THIS IS MY SECOND LINE
THIS IS MY THIRD LINE
THIS IS MY FIFTH LINE
ZEN/DING3434343
I am only interested in writing the first paragraph tha includes line DE4.2 in one of ther lines Not the Second paragraph that does not include the 'DE4.2'
Here's my code thus far:
CREATE OR REPLACE PROCEDURE my_app2 IS
infile utl_file.file_type;
outfile utl_file.file_type;
buffer VARCHAR2(30000);
b_paragraph_started BOOLEAN := FALSE; -- flag to indicate that required paragraph is started
BEGIN
-- open a file to read
infile := utl_file.fopen('TEST_DIR', 'mytst.txt', 'r');
-- open a file to write
outfile := utl_file.fopen('TEST_DIR', 'out.txt', 'w');
-- check file is opened
IF utl_file.is_open(infile)
THEN
-- loop lines in the file
LOOP
BEGIN
utl_file.get_line(infile, buffer);
     --BEGINPOINT APPLICATION
IF buffer LIKE 'foo%' THEN
          b_paragraph_started := TRUE;
     END IF;
     --LOOK FOR GRADS APPS
          IF b_paragraph_started AND buffer LIKE '%DE4%' THEN
          utl_file.put_line(outfile,buffer, FALSE);
END IF;
     --ENDPOINT APPLICATION
          IF buffer LIKE 'ZEN%' THEN
     b_paragraph_started := FALSE;
          END IF;
utl_file.fflush(outfile);
EXCEPTION
WHEN no_data_found THEN
EXIT;
END;
END LOOP;
END IF;
utl_file.fclose(infile);
utl_file.fclose(outfile);
EXCEPTION
WHEN OTHERS THEN
raise_application_error(-20099, 'Unknown UTL_FILE Error');
END my_app2;
When I run this code I only get one line: DE4.2 I AM MISSING THE ENTIRE PARAGRAPH
PLEASE ADVISE...

Hi,
Look at where you're calling utl_file.put_line. The only time you're writing anything is immediately after you find the the key word 'DE4', and then you're writing just that line.
You need to store the entire paragraph, and when you reach the end of the paragraph, write the whole thing only if you found the key word, like this:
CREATE OR REPLACE PROCEDURE my_app2 IS
    TYPE line_collection
    IS       TABLE OF VARCHAR2 (30000)
           INDEX BY BINARY_INTEGER;
    infile               utl_file.file_type;
    outfile                      utl_file.file_type;
    input_paragraph          line_collection;
    input_paragraph_cnt          PLS_INTEGER     := 0;          -- Number of lines stored in input_paragraph
    b_paragraph_started      BOOLEAN      := FALSE;     -- flag to indicate that required paragraph is started
    found_key_word          BOOLEAN          := FALSE;     -- Does this paragraph contain the magic word?
BEGIN
    -- open a file to read
    infile := utl_file.fopen('TEST_DIR', 'mytst.txt', 'r');
    -- open a file to write
    outfile := utl_file.fopen('TEST_DIR', 'out.txt', 'w');
    -- check file is opened
    IF utl_file.is_open(infile)
    THEN
     -- loop lines in the file
     LOOP
         BEGIN
          input_paragraph_cnt := input_paragraph_cnt + 1;
             utl_file.get_line (infile, input_paragraph (input_paragraph_cnt));
          --BEGINPOINT APPLICATION
          IF LOWER (input_paragraph (input_paragraph_cnt)) LIKE 'foo%' THEN
              b_paragraph_started := TRUE;
          END IF;
          --LOOK FOR GRADS APPS
          IF b_paragraph_started
          THEN
              IF input_paragraph (input_paragraph_cnt) LIKE '%DE4%'
              THEN
               found_key_word := TRUE;
              END IF;
              --ENDPOINT APPLICATION
              IF input_paragraph (input_paragraph_cnt) LIKE 'ZEN%' THEN
                  b_paragraph_started := FALSE;
               IF found_key_word
               THEN
                   FOR j IN 1 .. input_paragraph_cnt
                   LOOP
                       utl_file.put_line (outfile, input_paragraph (j), FALSE);
                   END LOOP;
               END IF;
               found_key_word := FALSE;
               input_paragraph_cnt := 0;
              END IF;
          ELSE     -- paragraph is not started
              input_paragraph_cnt := 0;
          END IF;
          EXCEPTION
              WHEN no_data_found THEN
               EXIT;
          END;
      END LOOP;
    END IF;
    utl_file.fclose (infile);
    utl_file.fclose (outfile);
--EXCEPTION
--    WHEN OTHERS THEN
--        raise_application_error(-20099, 'Unknown UTL_FILE Error');
END my_app2;
SHOW ERRORSIf you don't have an EXCEPTION section, the default error handling will print an error message, spcifying exactly what the error was, and which line of your code caused the error. By using your own EXCEPTION section, you're hiding all that information. I admit, the error messages aren't always as informative as we'd like, but they're never less informative than "Unknown UTL_FILE Error'. Don't use your own EXCEPTION handling unless you can improve on the default.
Remember that anything inside quotes is case-sensitive. If your file contains upper-case 'FOO', then it won't be "LIKE 'foo%' ".
Edited by: Frank Kulash on Dec 7, 2011 1:35 PM
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Whenever you post formatted text (such as your code) on this site, type these 6 characters:
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Problem in reading no. of files and writing into a single file

Hi,
Iam with Problem in reading no. of files and writing into a single file....
Iam reading no. of files stored in local directory.......
Iam able to read and print the data in files successfully....but while writing..only first file is being written...and the next files are not written in my output file...
plz tell me my mistake....I hope Iam doing some mistake while writing into file...PLz help.....
Basically my code structure is like this....
import java.io.*;
import java.util.regex.*;
import java.util.*;
import java.text.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
class Writing {
public static void main(String args[]) throws Exception {
          FileOutputStream fileOut = new FileOutputStream("ServerResult.xls"); //my output file
          int counter = 1;
          File dir = new File("C:/Perform/ServerLogs");
          String[] children = dir.list();
          if( children == null)
               System.out.println("The Directory mentioned does not exist");
          else {
               for (int fileNo = 0; fileNo < children.length; fileNo++ ) {        //Files iteration starts
                    String filename = children[fileNo];
          File logFile = new File(filename);
FileReader logFileReader = new FileReader(logFile);
BufferedReader logReader = new BufferedReader(logFileReader);
StringBuffer sBuf = new StringBuffer(5000);
          HSSFWorkbook wb = new HSSFWorkbook();
          HSSFSheet sheet = wb.createSheet();
          HSSFRow rowTitle;
          HSSFRow rowReq;
          HSSFRow rowRes;
String aLine = null;
boolean skip = false;
boolean readed = false;
boolean initReq = false;
          boolean flag = false;
long requestTime = 0;
long responseTime = 0;
long recdTime = 0;
long sentTime = 0;
          long hasTime = 0;
          long presentTime = 0;
          int hasCalls = 0;
Pattern startMessage = Pattern.compile("^<MESSAGE.*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern requestMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"RequestMsg.\".*ID=\".*_"+args[0]+"\".*<ActName>(.*)</ActName>.*", Pattern.DOTALL);
Pattern requestMessage1 = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"RequestMsg.\".*ID=\".*_"+args[0]+"\".*<Svc id=\"(.*)\">.*", Pattern.DOTALL);
Pattern responseMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern initMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"HostConnInit\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
Pattern initResMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\"null\".*", Pattern.DOTALL);
Pattern initResIDMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"ResponseMsg\".*ID=\"null\".*<IATA>"+args[0]+"</IATA>.*", Pattern.DOTALL);
          Pattern sentMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"DCMsgSentInfo\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
          Pattern rcvdMessage = Pattern.compile("^<MESSAGE.*TS=\"(.*)\" CATEGORY=\"DCMsgRcvdInfo\".*ID=\".*_"+args[0]+"\".*", Pattern.DOTALL);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
DecimalFormat dcf = new DecimalFormat("########.##");
String actName = "";
          if (fileNo ==0)
          rowTitle = sheet.createRow((short)0);
          rowTitle.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)0).setCellValue("Req/Res");
          rowTitle.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)1).setCellValue("Action");
          rowTitle.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)2).setCellValue("Server Time(in ms)");
          rowTitle.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)3).setCellValue("Request Vs Response Time in Server(in ms)");
          rowTitle.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)4).setCellValue("Time Taken By HAS/HOST(in ms)");
          rowTitle.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)5).setCellValue("No. of HAS calls");
          rowTitle.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
          rowTitle.createCell((short)6).setCellValue("Data Size");
          //wb.write(fileOut);
while((aLine=logReader.readLine()) != null) {
if(aLine.startsWith("<MESSAGE TYPE=\"EVENT\"")) {
Matcher m = startMessage.matcher(aLine);
if(m.find()) {
sBuf.setLength(0);
sBuf.append(aLine);
skip = false;
initReq = false;
m = initMessage.matcher(aLine);
if(m.find()) {
initReq = true;
} else {
if(initReq) {
m = initResMessage.matcher(aLine);
if(m.find()) {
sBuf.setLength(0);
sBuf.append(aLine);
skip = false;
} else if(aLine.startsWith("</MESSAGE>")) {
if(!skip) {
sBuf.append(aLine);
readed = true;
} else if(!skip){
sBuf.append(aLine);
if(!skip && readed) {
String tempStr = sBuf.toString();
if(tempStr.length() > 0) {
boolean reqMatched = false;
Matcher m = null;
if(initReq) {
m = initMessage.matcher(tempStr);
actName = "Intialization";
} else {
m = requestMessage.matcher(tempStr);
String time = "";
if(m.find()) {
reqMatched = true;
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
if(i == 1) {
time = groupStr;
} else if(i == 2) {
actName = groupStr;
} else if(!initReq){
m = requestMessage1.matcher(tempStr);
if(m.find()) {
reqMatched = true;
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
if(i == 1) {
time = groupStr;
} else if(i == 2) {
actName = groupStr;
if(time.length() > 0 ) {
try{
requestTime = sdf.parse(time).getTime();
}catch(Exception ex){}
System.out.println("Request,"+actName+","+time+",,,,"+dcf.format(((double)time.length()/1024.0))+"K");
                              //bw.write("Request,"+actName+","+time+",,,,"+dcf.format(((double)time.length()/1024.0))+"K");
                              String reqDataSize = dcf.format(((double)time.length()/1024.0))+"K" ;
                              rowReq = sheet.createRow((short)counter);
                                   rowReq.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)0).setCellValue("Request");
                                   rowReq.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)1).setCellValue(actName);
                                   rowReq.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)2).setCellValue(time);
                                   rowReq.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)3).setCellValue("");
                                   rowReq.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)4).setCellValue("");
                                   rowReq.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)5).setCellValue("");
                                   rowReq.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
                                   rowReq.createCell((short)6).setCellValue(reqDataSize);
                                   counter = counter +1;
                                   System.out.println("counter is "+counter);
                         Matcher l = sentMessage.matcher(tempStr);
                         Matcher k = rcvdMessage.matcher(tempStr);
               if(l.find()) {
                                        for (int i=1; i<=l.groupCount(); i++) {
     String groupStr2 = l.group(i);
try{
sentTime = sdf.parse(groupStr2).getTime();
}catch(Exception ex){}
                    if(k.find())
                                             for(int j=1;j<=k.groupCount(); j++) {
                                             String groupStr1 = k.group(j);
                                             try{
recdTime = sdf.parse(groupStr1).getTime();
}catch(Exception ex){}
                                             presentTime = (recdTime - sentTime);
                                             hasTime = hasTime + presentTime;
                                             hasCalls = hasCalls +1;
if(!reqMatched) {
if(initReq) {
m=initResIDMessage.matcher(tempStr);
} else {
m=responseMessage.matcher(tempStr);
if(m.find()) {
for (int i=1; i<=m.groupCount(); i++) {
String groupStr = m.group(i);
try{
responseTime = sdf.parse(groupStr).getTime();
}catch(Exception ex){}
                                             String resDataSize = dcf.format(((double)tempStr.length()/1024.0))+"K" ;
                                             rowRes = sheet.createRow((short)(counter));
                                             rowRes.createCell((short)0).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)0).setCellValue("Response");
                                             rowRes.createCell((short)1).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)1).setCellValue(actName);
                                             rowRes.createCell((short)2).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)2).setCellValue(groupStr);
                                             rowRes.createCell((short)3).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)3).setCellValue((responseTime - requestTime));
                                             rowRes.createCell((short)4).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)4).setCellValue(hasTime);
                                             rowRes.createCell((short)5).setCellType(HSSFCell.CELL_TYPE_NUMERIC);
                                             rowRes.createCell((short)5).setCellValue(hasCalls);
                                             rowRes.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_STRING);
                                             rowRes.createCell((short)6).setCellValue(resDataSize);
                                             hasTime = 0;
                                             hasCalls = 0;
                                             counter = counter + 1 ;
sBuf.setLength(0);
readed = false;
          wb.write(fileOut);
          } // End of for (int fileNo = 0; fileNo < children.length; fileNo++ )
}     //End of else
          fileOut.close();
} //End of public static void main
} // End of Class

First of all, use [code]-tags to make your code readable, please.
I didn't do a complete inspection of your code (because it's too much and unreadable as it is) and I don't know POI, but creating a new HSSFWorkbook for each input file sounds fishy to me ... try re-using the workbook and just creating a new sheet in each iteration.

Problem on reading and writing from from a *.txt file

I get Problem on reading and writing from from a *.txt file. The following is the read() method...
The software said the DataInputStream is depreciated. Can anyone help me please?
public void read()
    File file = new File("C://Documents and Settings//Charles//My Documents//Brunel//EE2065//Assignment and Lab//Assignment 4 and Lab 4//data.txt");
    FileInputStream in = null;
    String str = "";
    try
      in = new BufferedReader(file);
      //in = new FileInputStream(file);
      for(;;)
        str = new BufferedReader(in).readLine();
        //str = new DataInputStream(in).readLine();
        if(str == null)
          break;
        System.out.print(str);
    in.close();
    catch(IOException e)
        System.err.println("execution error: " +e);
}

Thank you for your reply. I have made some change. However, there is an incompetable type found error.
in = new BufferedReader(new InputStreamReader(in));The following are all of the code.
public void read()
    File file = new File("C://Documents and Settings//Charles//My Documents//Brunel//EE2065//Assignment and Lab//Assignment 4 and Lab 4//data.txt");
    FileInputStream in = null;
    //BufferedReader in = null;
    String str = "";
    try
      in = new BufferedReader(new InputStreamReader(in));
      //in = new FileInputStream(file);
      for(;;)
        BufferedReader Bstr = new BufferedReader(new InputStreamReader(in));
        //str = new BufferedReader(in).readLine();
        //str = new DataInputStream(in).readLine();
        if(str == null)
          break;
        System.out.print(str);
    in.close();
    catch(IOException e)
        System.err.println("execution error: " +e);

Reading strings and integers from a text file

I want to read the contents of a text file and print them to screen, but am having problems reading integers. The file contains employee's personal info and basically looks like this:
Warren Laing
32 //age, data type is int
M //gender, data type is String
Sharon Smith
44
F
Here's what I've done so far. The method should continue reading the file until there's no lines left. When I call it from main, I get a numberFormatException error. I'm not sure why because the data types of the set and get methods are correct, the right packages have been imported, and I'm sure I've used Integer.parseInt() correctly (if not, pls let me know). Can anyone suggest why I'm getting errors, or where my code is going wrong?
many thanks
Chris
public void readFile() throws IOException{
BufferedReader read = new BufferedReader(new FileReader("personal.txt"));
int age = 0;
String input = "";
input = read.readLine();
while (input != null){
setName(input);
age = Integer.parseInt(input);
setAge(age);
input = read.readLine();
setGender(input);
System.out.println("Name: " + getName() + " Age: " + getAge() + " Gender: " + getGender());
read.close();

To answer your question - I'm teaching myself java and I haven't covered enumeration classes yet.
With the setGender("Q") scenario, the data in the text file has already been validated by other methods before being written to the file. Anyway I worked out my problems were caused by "input = read.readLine()" being in the wrong places. The code below works fine though I've left out the set and get methods for the time being.
Chris
public static void readFile()throws IOException{
String name = "";
String gender = "";
int age = 0;
BufferedReader read = new BufferedReader(new FileReader("myfile.txt"));
String input = read.readLine();
while(input != null){
name = input;
input = read.readLine();
gender = input;
input = read.readLine();
age = Integer.parseInt(input);
input = read.readLine();
System.out.println("Name: " + name + " Gender: " + gender + " Age: " + age);
read.close();

File importer detected an inconsistency in the file stucture of (file name). Reading and writing this file's metadata (XMP) has been disabled.

I have duplicated a project to work on another computer. The project opens fine but when I import new footage/audio files I get this message. "File importer detected an inconsistency in the file stucture of (file name). Reading and writing this file's metadata (XMP) has been disabled." Then I can't play my timeline and Premier Pro crashes. I have to force quit and restart my computer to continue working. What does this error really mean? How do you rectify?
Our workflow requires that we duplicate projects to make updates because we are frequently revising but need to keep original project unchanged and intact.

I have a similar issue and message , but occurs when I import AVI clips from OnLocation CS4 to Premier Pro CS4.

Reading certain lines of a text file and boundary testing ...

Hi all,
This is only my second post so please be gentle ;P
Basically, my problem is that i want to read certain chunks of a text file into different text boxes. For example, this may be 50 lines in textbox1, then 50 in textbox2, then the rest in textbox3. i know this would involve using a splitter, but i have absolutelyno
idea how i would go about implementation this. any help would be greatly appreciated on this.
my second problem is that i also need to carry out testing on my system. one page in this is the login page. I understand that normal data would be all correct fields and erroneous data would be blank field(s). however, i dont really know what would be boundary
testing for this. The only thing i could think of is correct username but incorrect password but i dont think this is correct. again, any help would be appreciated.
thanks,
LTID

Hi all,
This is only my second post so please be gentle ;P
Basically, my problem is that i want to read certain chunks of a text file into different text boxes. For example, this may be 50 lines in textbox1, then 50 in textbox2, then the rest in textbox3. i know this would involve using a splitter, but i have absolutelyno
idea how i would go about implementation this. any help would be greatly appreciated on this.
my second problem is that i also need to carry out testing on my system. one page in this is the login page. I understand that normal data would be all correct fields and erroneous data would be blank field(s). however, i dont really know what would be boundary
testing for this. The only thing i could think of is correct username but incorrect password but i dont think this is correct. again, any help would be appreciated.
thanks,
LTID
I suppose there would be a reason for needing to read some amount of lines into each textbox. But you make no mention of why that would be necessary.
There is such a thing as a delimited text file. Each line would contain a delimiter of some character between fields on each line. That file could be used for displaying information in separate controls on a Form.
But you only mention TextBox's and reading x amount of lines from a file into each TextBox as if you are perhaps providing certain information for each TextBox.
If that is what you want then provided replies will work. If you want to explain what you need to do with regard to information in a file and displaying it otherwise then please explain so that a better method could be provided.
Example using Text Field Parser.
https://msdn.microsoft.com/en-us/library/microsoft.visualbasic.fileio.textfieldparser(v=vs.110).aspx
Option Strict On
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.Location = New Point(CInt((Screen.PrimaryScreen.WorkingArea.Width / 2) - (Me.Width / 2)), CInt((Screen.PrimaryScreen.WorkingArea.Height / 2) - (Me.Height / 2)))
Using MyReader As New Microsoft.VisualBasic.FileIO.TextFieldParser("c:\Users\John\Desktop\DelimitedTextFile.Txt")
MyReader.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.Delimited
MyReader.Delimiters = New String() {"|"}
Dim currentRow As String()
While Not MyReader.EndOfData
Try
currentRow = MyReader.ReadFields()
ListBox1.Items.Add(currentRow(0))
ListBox2.Items.Add(currentRow(1))
ListBox3.Items.Add(currentRow(2))
Catch ex As Microsoft.VisualBasic.FileIO.MalformedLineException
MsgBox("Line " & ex.Message & " is invalid. Skipping")
End Try
End While
End Using
End Sub
End Class
Text in text file DelimitedTextFile.Txt. Delimiter is vertical bar.
Bill|Home Depot|Garden Department
Cheryll|DirectTV|Installer
Charlie|C&K Automotive|Owner
Zorro|Television|Masked Avenger
Samantha|Mayo Clinic|Nurse Practitioner
Mona|Bahia Honda Key State Park|Park Ranger
La vida loca

IPhone4 how through the USB mobile phone file reading and writing?

iPhone4 how through the USB mobile phone file reading and writing?

No idea what you are asking.
Please explain

Reading and Writing large Excel file using JExcel API

hi,
I am using JExcelAPI for reading and writing excel file. My problem is when I read file with 10000 records and 95 columns (file size about 14MB), I got out of memory error and application is crashed. Can anyone tell me is there any way that I can read large file using JExcelAPI throug streams or in any other way. Jakarta POI is also showing this behaviour.
Thanks and advance

Sorry when out of memory error is occurred no stack trace is printed as application is crashed. But I will quote some lines taken from JProfiler where this problem is occurred:
          reader = new FileInputStream(new File(filePath));
          workbook = Workbook.getWorkbook(reader);
          *sheeet = workbook.getSheet(0);* // here out of memory error is occured
           JProfiler tree:
jxl.Workbook.getWorkBook
      jxl.read.biff.File
             jxl.read.biff.CompoundFile.getStream
                   jxl.read.biff.CompoundFile.getBigBlockStream Thanks

Quickest method for reading and writing files

Hi
I need help regarding file operations.(Reading and Writing). Currently I am using BufferedReader and BufferedWriter to read and write files. But the files (XML) are very huge files(from 30 -50 mb). This is slowing the application to a great extent. Is there any other approach to perform the above mentioned operations on XML files in a fast manner.
Thank You
Mansoor.

Hi
Can u let me know how to use the java.nio pavkage for primitve data types(int,float..., boolean). I have tried it but found no success.
Thank You
Mansoor

Reading and Writing to a Text File

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