Writing in between a text File
Hi all,
During a task, I am facing an interesting problem, this came first time since my 2 years development in Java.
In always use
BufferedReader in = new BufferedReader(new FileReader("/home/oracle/init1.txt"));
to read from file and,
PrintWriter opRpt = new PrintWriter ( new FileWriter("/home/oracle/init1.txt", true));
to write to a file.
This always works fine, but in the current task, I have to write in a text file,
This file has e.g. 120 lines and I have to write after 36th line.
So far, the suggestion I found is first to open text file (e.g. A),
write first 36 lines to another file (e.g. B)
then write new line to B,
and then write remaining lines from A to B.
Is there any easy way to do this job...
Please guide me, I m in trouble.
Thankx in advance.
Please guide me, I m in trouble.No you're not; you already outlined a fine scenario how to accomplish this. If your file really contains just
~100 lines, an alternative would be to read the entire thing in core (the first part), add the new line(s)
and read the rest of the file. Close the file and reopen it for writing again (effectively destroying its old
contents) and write the new contents to the file again. An List containing all the lines of the
file would do fine here.
kind regards,
Jos
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Writing HTML data in TEXT File
I am writing HTML content in TEXT file ...I read it in a string and then write using PrintStream...
But it writes all content on one line ..I want to write it as it was in source HTML file...Perchance, the OP is referring to the lack of carriage returns in his outputted data, and querying where they have absconded to? An analysis of his posts to date reveals that he has read the contents of a File into a String variable, and wants to write the (presumably modified) String back to a file (uncertain as to whether this is the same file or a different one) In the process of outputting to said file, carriage returns previously contained in the original input file are not present in the output. I would hazard a guess that the OP does not want said carriage returns in the String to disappear.
Is my analysis of the situation correct?
An example of the code that you have written to date would be of extreme usefulness to us in aiding you in your noble quest.
Without such a resource, I must rely on my intuition instead.
Possible places that the carriage returns are being "dropped"
1 - On reading in. Are you discarding carriage returns while building up your variable?
2 - On manipulating. Are you processing this line by line, or reading it all into one large variable?
3 - On output - are you using "print" or "println" in the output?
I look forward to further correspondence with you sir
kind regards,
evnafets -
Writing in to a Text file in Vista 32 OS
Dear Friends,
I have developed a standalone ticker in Adobe AIR, in that
iam storing setting options in a local text file. It is working
fine in XP.
but when i install my application(ticker) in Vista32 OS,
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function writefile() {
tempscr1=3;
var finalstr2:String =
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Anybody can help me. if it works in Vista also i can release
my product, i got struct up... kindly tell me should i change my
coding to write txt file in Visa? pls help me....
Thanks in advance,
Syed Abdul RahimYour user probably doesn't have permission to write to the
application directory. The OS is right to protect the program
directory.
You should be writing data files into the user's home
directory somewhere. All of the other "somethingDirectory"
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Error writing path into a text file
Latest edit to my text edit script is trying to remember the last opened file using a .txt "preference" file in a script bundle.
Before I click run I edit the Pref file and put Default. I then click Open last. It then does what it should (alot like my other post) but gets an error at the last write in the script, writing the file path to the pref file. This is taken from the event viewer:
write alias "Macintosh HD:Users:Richard:Documents:Other Text Files:Untitled.txt" to file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Prefs:Save Location Pref.txt" as text
Result:
error "Can’t make alias \"Macintosh HD:Users:Richard:Documents:Other Text Files:Untitled.txt\" into type string." number -1700 from alias "Macintosh HD:Users:Richard:Documents:Other Text Files:Untitled.txt" to string
Script here:
display dialog "Open last saved or choose file" buttons {"Open last", "Open other"} default button 2
if button returned of result is "Open last" then
set val1 to (read POSIX file "/Users/Richard/Library/Scripts/Richard's Text Editor 3.scptd/Contents/Resources/Prefs/Save Location Pref.txt")
if val1 is "Default" then
EditFile("no")
else
EditFile(val1)
end if
else
EditFile("no")
end if
on EditFile(val2)
if val2 is "no" then
set val3 to (choose file with prompt "Please select a .txt file:
To save a text file as .txt in TextEdit, click 'Make Plain Text' in the Format menu and save the file.")
--Get file path.
else
set val3 to val2
end if
if (get eof val3) is 0 then --Read doesn't like eof (end of file) to be 0 bytes.
set val4 to ""
else
set val4 to read val3 --Read file before it gets erased.
end if
open for access val3 with write permission --Open file.
set eof val3 to 0 --Erase file.
repeat
display dialog "Edit your text." default answer val4 buttons {"Revert", "Save"}
set {val5, val6} to {text returned of result, button returned of result}
if val6 is "Save" then
write val5 to val3
exit repeat
else
write val4 to val3
end if
end repeat
--Write to file giving old data as default (to give the same affect as as read and edit).
close access val3
open for access POSIX file "/Users/Richard/Library/Scripts/Richard's Text Editor 3.scptd/Contents/Resources/Prefs/Save Location Pref.txt" with write permission
set eof POSIX file "/Users/Richard/Library/Scripts/Richard's Text Editor 3.scptd/Contents/Resources/Prefs/Save Location Pref.txt" to 0
write val3 to POSIX file "/Users/Richard/Library/Scripts/Richard's Text Editor 3.scptd/Contents/Resources/Prefs/Save Location Pref.txt" as text
close access POSIX file "/Users/Richard/Library/Scripts/Richard's Text Editor 3.scptd/Contents/Resources/Prefs/Save Location Pref.txt"
end EditFile
Thanks, I can guess this is a simple fix like the others.Hmmm.
First I checked it was all OK without POSIX and it works:
display dialog "Open last saved or choose file" buttons {"Open last", "Open other"} default button 2
if button returned of result is "Open last" then
set val1 to alias (read file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt")
--Read pref file to find out path of last edited file.
if val1 is "Default" then
EditFile("no")
else
EditFile(val1)
end if
else
EditFile("no")
end if
on EditFile(val2)
if val2 is "no" then
set val3 to (choose file with prompt "Please select a .txt file:
To save a text file as .txt in TextEdit, click 'Make Plain Text' in the Format menu and save the file.")
--Get file path.
else
set val3 to val2
end if
if (get eof val3) is 0 then --Read doesn't like eof (end of file) to be 0 bytes.
set val4 to ""
else
set val4 to read val3 --Read file before it gets erased.
end if
open for access val3 with write permission --Open file.
repeat
set eof val3 to 0 --Erase file.
display dialog "Edit your text." default answer val4 buttons {"Revert", "Save"}
set {val5, val6} to {text returned of result, button returned of result}
if val6 is "Save" then
write val5 to val3
exit repeat
else
write val4 to val3
end if
end repeat
--Write to file giving old data as default (to give the same affect as as read and edit).
close access val3
open for access file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt" with write permission
set eof file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt" to 0
write (val3 as string) to file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt" as text
close access file "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt"
--Save path of edited file to pref file.
end EditFile
But change that 3rd line to:
set val1 to alias (read file (path to resource "Save Location Pref.txt"))
gets:
Can’t make file (alias "Macintosh HD:Users:Richard:Library:Scripts:Richard's Text Editor 3.scptd:Contents:Resources:Save Location Pref.txt") into type file.
P.S. Sorry bout question in answered post again. -
Reading multiple text files and writing them to one text file
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import java.io.FileOutputStream;
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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. -
Writing Records in a Text File to Specific Columns in the Text File
Help Please! I am a noooooooooobbbbbb!
I have searched this forum looking for a procedure that will write records from my database into certain col (positions) in a text file. Example:
1234 TONY TEST 84889922 Y 34 TORCHCOMP 34
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I am thinking I would like to setup variaables like:
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Thank YouHi,
That's a formatting issue.
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SPOOL OFFIf you have to do it in the back end, use functions like TO_CHAR and RPAD to make each part exactly the right length, then concatenate them all into one big string:
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|| ' ' -- 6-9
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SPOOL OFFEdited by: Frank Kulash on May 22, 2009 10:40 AM -
Writing data to a text file in a java code
hey,
can anybody tell me how can i enter data into a text file using java code.
thanxyeah this is the proper answer....
i had also a pblm ..that i had to read data from an excel sheet and write it to a File thru java code ....
u can also use FileOutPutStream object....if u want...
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bufferWriter.write(stringToBeWritten);
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Problems writing a UTF-8 text file
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http://unix.stackexchange.com/questions/1079/output-the-common-lines-similaritie s-of-two-text-files-the-opposite-of-diff/94532#94532
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Writing to a new line in a text files
I have a servlet that collects results from a questionnaire by getting the parameter values of the radio buttons on a questionnaire page. I am trying to store the results of the questionnaire by writing them to a text file. I can get it to write to the files fine but cannot seem to get it to write the next set of results to a new line. I have many different ways but cannot seem to get it to work. Any ideas?
Heres the part of the code that writes to a text file
String lineRead = "";
int lineCount = 0;
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file
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int lineCount = 0;
while((lineRead = input.readLine()) !=
adLine()) != null)
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String result =
String result = request.getParameter("question" +
lineCount);
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Solved!
Go to Solution.Nevermind. I believe this can be accomplished with the "Deny Access" function.
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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 create a text file in the given path and delete it after the use?
Hi all,
I am trying to create a text file at the given path and delete the created file after the use.
I am using following code.:
import java.io.*;
// write binary data as characters
public class RanIO {
public static void main(String f[])
// First illustrate append
String lineSep = "\n";
try {
File temp= new File("C:/Ash","cute.txt");
boolean ch=temp.createNewFile();
if(ch)
System.out.println("file created");
else
System.out.println("file Not created");
//writing to file
/* PrintWriter p = new PrintWriter(new BufferedWriter(new FileWriter("cute.txt",true)));
p.print("Emp NO");
p.close();*/
// Open fileWriter in append mode
FileWriter fos = new FileWriter(temp, true);
BufferedWriter bw = new BufferedWriter(fos);
PrintWriter pw = new PrintWriter(fos);
double d=550;
// lineSep = System.getProperty("line.separator");
pw.print("Hello");
//pw.print( lineSep );
pw.print( d );
pw.close();
boolean det=temp.delete();
if(det)
System.out.println("File deleted");
else
System.out.println("File not deleted");
} catch (IOException ioe)
System.out.println( "Append IO error:" + ioe );
My problem:
1)
I am not able to write to the file. I want to know, where i am going wrong.
It is giving error message like
"Canot resolve Symbol: temp,"
But, FileWriter Constructor should accept a File type parameter.
here temp is a file parameter.
If i am not using file=new file();
i can't delete the file after the use. i.e if i use
PrintWriter p = new PrintWriter(new BufferedWriter(new FileWriter("cute.txt",true)));
how can i delete cute.txt after the use?
2)
I am not able to write to the text file. file is created but, a blank file.
"Hello" is not written into the text file.
can anyone help me in this regard
Thanks in advance
AshviniThank you Ram,
But, i want to create a text file in Append mode.
for that i used
FileWriter fos = new FileWriter(temp,true); But, it is not accepting FileWriter constructor in
this format. if i use
FileWriter fos = new
FileWriter("c:/ash/cute.txt",true); it works fine. !!!!!Here's the javadoc
public FileWriter(File file,
boolean append)
throws IOExceptionConstructs a FileWriter object given a File object. If the second argument is true, then bytes will be written to the end of the file rather than the beginning.
Parameters:
file - a File object to write to
append - if true, then bytes will be written to the end of the file rather than the beginning
Throws:
IOException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:
1.4
Are you using jdk.13 or lower ?
>
ONe more doubt, Does flush method deletes a file?
if not, then i need to use
File temp=new File("c:/ash/cute.txt");
FileWriter fos = new FileWriter(temp,true); //which
is again a problem
if(temp.delete())
out.println("File is deleted");
}I don't know whether i am taking it wrong ! or
anything wrong with my coding ! but, after creating
and writing data into a text file. I must delete it
as it contains confidential informations.
Regards,
Thanks.'flush' writes to a file immediately. Else you should explicitly call 'flush' to write contents from buffer to underlying source.
javadoc again
PrintWriter
public PrintWriter(Writer out,
boolean autoFlush)Create a new PrintWriter.
Parameters:
out - A character-output stream
autoFlush - A boolean; if true, the println, printf, or format methods will flush the output buffer
cheers,
ram.
Question; What do you gain by opening a file, writing to it and deleting it in the same program ? -
Write data to multiple text files after specific size
Hello,
I wrote a code that contineously writes data to a text file. The problem is I am running this VI for long time and therefore this text file is being bigger in size e.g. more than 10MB. I want to split writing data in this text file after max 1MB size. Can anyone help ????
thanks in advance.CMW.. wrote:
You could use the "File/Directory Info Function" in the Advanced File VIs and Function palette to check the size. If the file is too big. close it and create a new one.
I would use the Get File Position since this won't cause Windows to have to do so much. Assuming you are just writing and not setting the file position manually, this will return the size of the file in bytes (file position will always be at the end of the file).
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I hope this doesn't come off as a dumb question... and I'm not really sure how to ask it. The server path for users in iCal are found at /principals/_uids_/really long string of random characters. Is this correct? Shouldn't they be found at /principa
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Hi Experts, We have WPC Custom Webforms in the Home page and they are working fine for the past 6 monts. Suddenly, some of the users (random) are getting runtime exceptions on Production. The error log is as below and it looks like some CSS Classload