How to update a text file?

I am doing an assignment about a bank account. A text file stores the accounts.
Account Text file:
User1|Password1|Balance1
User2|Password2|Balance2
When user wants to deposit or withdraw the account, then how can update the balance.
The problem is the length of balance is not fix. eg. $100 -> $90, vice versa.

You cannot update a file that way. You're going to have to read the file and rewrite it in another file replacing the old balance value with the new balance value and then overwrite the old file with the new file.
If the file is not to big you can load the whole file in memory with a String then work on that before rewriting it to the file.
Otherwise your going to have to read chunks of lines and append them to a temporary file.
I suppose this is no enteprise application but only a student's assignment, or else you should of course use a database for that kind of job!

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How to update a text file or change some text easily ??

Hi
I want to change some text inside a text file. I can do it as below:
1) new a File file
2) new a FileInputStream(file) and call read()
3) modify text
4) new a File newfile
5) new FileOutputStream(newfile) and call write()
6) delete file
7) rename newfile to file
It is too complecated. What is easy way to do it ? Thanks for help
Gary

Hi NLSurfMan,
I ceate a coding below , it always give me error:
java.io.FileNotFoundException: c:\abc\file.rtf (The process cannot access the file because it is being used by another process)
I have closed the FileReader and BufferedReader. I still have this problem. Why. Thanks. Gary
int c;
String text="";
File filename=new File("c:/abc/file.rtf");
FileReader fileReader =new FileReader(filename);
BufferedReader bReader=new BufferedReader(fileReader);
while ( (c=bReader.read())!=-1 ) {
text=text+(char)c;
bReader.close();
fileReader.close();
System.out.println("text="+text);
text=text+" I want to make some change here";
File filename1=new File("c:/abc/file.rtf");
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How to update a dbf file with gui_upload???

hi friends,
i would like to know how to update a dbf file with gui_upload???
as i hve already know that it's easy to convert dbf to tab formatted text fle and thn upload it.but i want the direct uploading way.i don't let my user's bsy with converting existing dbf to txt.so pls help me asap!!!!!i will be thankful to you!!!!!

its very easy you can search other forum!!!

How to upload a text file from a shared folder and provide an o/p

how to upload a text file from a shared folder and provide an o/p containing the details in each order in the text file

Hi,
Use GUI_UPLOAD to upload a text file from a shared folder.
Use GUI_DOWNLOAD to download data in a file on the presentation server or use OPEN DATASET, TRANSFER and CLOSE DATASET statements to download data to the application server.
Now, I hope the code for data fetching, if required, is already present in the report.
Reward points if the answer is helpful.
Regards,
Mukul

How to convert a text file in lower case to upper case?

I've a beginner in java world and I just come through the tutorial in http://java.sun.com/docs/books/tutorial/essential/io/filestreams.html showing how to copy a text file:
import java.io.*;
public class Copy {
public static void main(String[] args) throws IOException {
File inputFile = new File("farrago.txt");
File outputFile = new File("outagain.txt");
FileReader in = new FileReader(inputFile);
FileWriter out = new FileWriter(outputFile);
int c;
while ((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
And I would like to ask how to covert all lower case letters in input file to upper case letter in output file at the same time of copying.
I guess it'll be using Character.toUpperCase(c), but I don't know how to do it actually.
Any help would be much appreciated.

Hope this helps
import java.io.*;
public class Copy {
public static void main(String[] args) throws IOException {
File inputFile = new File("farrago.txt");
File outputFile = new File("outagain.txt");
FileReader in = new FileReader(inputFile);
FileWriter out = new FileWriter(outputFile);
BufferedReader buff = new BufferedReader(in);
String c;
while ((c = buff.readLine()) != null)
out.write(c.toUpperCase());
in.close();
out.close();
}

How to read several text files at a time

Dear all
Read and write one text file is not a problem, but what confusies me is how to read several text files at one time, in the meanwhile,
is it possible to display the name of the text file?
For example, assuming I want to load file" cha 1, cha 2 , cha 3, " at one time and show their names, how to hadle with it
I have reviewed some files and it is not helpful

Either with a 'for' loop like in the lib you have attached, or like this attached VI
that's it
Message Edited by devchander on 05-30-2006 05:11 AM
Attachments:
MULTIPLE READ.vi ‏44 KB

How to send a text file to a printer?

Hi, I'm in dark on how to send a text file to a printer through Java Stored Procedure.
Here are what I tried so far (OS: win 2000, Oracle: 817 or 9i2):
1, Enable DOS command in Java Stored Proc. and try to send PRINT command there:
public static String Run(String Command){
try{
Runtime.getRuntime().exec(Command);
System.out.println("Command: " + Command);
return("0");
catch (Exception e){
System.out.println("Error running command: " + Command +
"\n" + e.getMessage());
return(e.getMessage());
public static void main(String args[]){
if (args.length == 1)
Run("print /D:\\\\enterprise\\john " + args[0]);
else System.out.println("Usage: java OSCommand filename");
PL/SQL wrapper:
CREATE OR REPLACE FUNCTION OSCommand_Run(p1 IN VARCHAR2) RETURN VARCHAR2 AUTHID CURRENT_USER AS LANGUAGE JAVA NAME 'OSCommand.Run(java.lang.String) return java.lang.String';
SQL command:
//print /D:\\machine\printer test.txt
I loaded the Java Stored Procedure into SYSDBS account, it failed silently, even though piece of code works fine in external JVM.
2, Use filePrinter:
public static String print(String printString) {
try{
String printerUNC = "\\\\machine\\printer";
FileWriter fw = new FileWriter(printerUNC);
PrintWriter pw = new PrintWriter(fw);
pw.println(printString);
fw.close();
return "OK";
}catch(Exception e){
e.printStackTrace();
return "Exception: " + e.getMessage();
public static void main(String[] args) {
try{
String printerUNC = "\\\\machine\\printer";
String printString = "Hello World";
FileWriter fw = new FileWriter(printerUNC);
PrintWriter pw = new PrintWriter(fw);
pw.println(printString);
fw.close();
}catch(Exception e){e.printStackTrace();}
I loaded it into SYSDBS too, and tried with this:
SQL> select MY_PRINT.PRINT('HELLO from Oracle') from dual;
MY_PRINT.PRINT('HELLOFROMORACLE')
Exception: No such file or directory
SQL> show user
USER is "SYS"
It works in external JVM too.
What's wrong with this?
Thanks for any help in advance,
Charles

Avi:
Thanks for your response!
I put the java code in SYS, 'cause I assume that account has max privilege. If the test is successful, I will move that to some user schema and then to deal with those privilege settings... But I'm unlucky.
I checked Ask Tom, this is what I got from http://asktom.oracle.com/pls/ask/f?p=4950:8:1619723::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:38012348052,%7Bprinter%7D:
... Print file from PL/SQL ...
If you are using Oracle8i, release 8.1 -- much can be done with Java. java
would be able to print directly from the server.
Looks like using Java to print out file is better than PL/SQL. But there's no more hint there! And, no new question can be asked there today either...
I'm wondering whether we can create a socket to a printer and send the characters there directly... Anyone has experience on this?
Thanks for all the help in advance,
Charles

How to zip a text file and send as email attachment in SAP version 4.6c?

Hi Guru,
How to zip a text file in SAP version 4.6c which doesn't have class CL_ABAP_ZIP?
Please help.
Thanks & Regards,
Ari

Hi,
Try this link
[http://sap.ittoolbox.com/groups/technical-functional/sap-dev/sapr3dev-zip-file-from-sap-1707099?cv=expanded]
Cheers,
Surinder

How to create a text file or XML file and add content through code into it...

Hi Everyone,
How to create a text file and add content through the code to the text file eform javascript ......orelse can we create a text file in life cycle designer...
Else say how to create a new XML file through the code and how some content like Example "Hello World".

You can create a text file as a file attachment (data object) using the doc.createDataObject and doc.setDataObjectContents:
http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.450.html
http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.528.html
You can then export the file with the doc.exportDataObject method:
http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.463.html
This won't work with Reader if it hasn't been given the file attachment usage right with LiveCycle Reader Extensions.

"how to load a text file to oracle table"

hi to all
can anybody help me "how to load a text file to oracle table", this is first time i am doing, plz give me steps.
Regards
MKhaleel

Usage: SQLLOAD keyword=value [,keyword=value,...]
Valid Keywords:
userid -- ORACLE username/password
control -- Control file name
log -- Log file name
bad -- Bad file name
data -- Data file name
discard -- Discard file name
discardmax -- Number of discards to allow (Default all)
skip -- Number of logical records to skip (Default 0)
load -- Number of logical records to load (Default all)
errors -- Number of errors to allow (Default 50)
rows -- Number of rows in conventional path bind array or between direct path data saves (Default: Conventional path 64, Direct path all)
bindsize -- Size of conventional path bind array in bytes (Default 256000)
silent -- Suppress messages during run (header, feedback, errors, discards, partitions)
direct -- use direct path (Default FALSE)
parfile -- parameter file: name of file that contains parameter specifications
parallel -- do parallel load (Default FALSE)
file -- File to allocate extents from
skip_unusable_indexes -- disallow/allow unusable indexes or index partitions (Default FALSE)
skip_index_maintenance -- do not maintain indexes, mark affected indexes as unusable (Default FALSE)
commit_discontinued -- commit loaded rows when load is discontinued (Default FALSE)
readsize -- Size of Read buffer (Default 1048576)
external_table -- use external table for load; NOT_USED, GENERATE_ONLY, EXECUTE
(Default NOT_USED)
columnarrayrows -- Number of rows for direct path column array (Default 5000)
streamsize -- Size of direct path stream buffer in bytes (Default 256000)
multithreading -- use multithreading in direct path
resumable -- enable or disable resumable for current session (Default FALSE)
resumable_name -- text string to help identify resumable statement
resumable_timeout -- wait time (in seconds) for RESUMABLE (Default 7200)
PLEASE NOTE: Command-line parameters may be specified either by position or by keywords. An example of the former case is 'sqlldr scott/tiger foo'; an example of the latter is 'sqlldr control=foo userid=scott/tiger'. One may specify parameters by position before but not after parameters specified by keywords. For example, 'sqlldr scott/tiger control=foo logfile=log' is allowed, but 'sqlldr scott/tiger control=foo log' is not, even though the position of the parameter 'log' is correct.
SQLLDR USERID=GROWSTAR/[email protected] CONTROL=D:\PFS2004.CTL LOG=D:\PFS2004.LOG BAD=D:\PFS2004.BAD DATA=D:\PFS2004.CSV
SQLLDR USERID=GROWSTAR/[email protected] CONTROL=D:\CLAB2004.CTL LOG=D:\CLAB2004.LOG BAD=D:\CLAB2004.BAD DATA=D:\CLAB2004.CSV
SQLLDR USERID=GROWSTAR/[email protected] CONTROL=D:\GROW\DEACTIVATESTAFF\DEACTIVATESTAFF.CTL LOG=D:\GROW\DEACTIVATESTAFF\DEACTIVATESTAFF.LOG BAD=D:\GROW\DEACTIVATESTAFF\DEACTIVATESTAFF.BAD DATA=D:\GROW\DEACTIVATESTAFF\DEACTIVATESTAFF.CSV

How to attach a text file as an attachment to email message?

Hello Everybody,
I have a .csv file, in which details about emp-id, emp-name, e-expenses for Reimbursement and email address are stored.
My application reads this .csv file, and sends a mail to each employee with his id, salary details in text format. (by changing content type to "text/plain") The code is working fine. But,
My problem is:
The message is sent as message body to the end user.
The end user / the person who receives this mail will not be a technical person. So,
1) If he trys to take a print out of this e-mail, He get only half of it.(as no. of colums will be more than paper size).
2) I am finding alignment problem. IF employee name is too big, other columns will shift to right and data will not be exactly under column header. (it is going in zig zag way)
So, I thought sending text file with all the details as an attachment might do well.
But, I don't know how to attach a text file to email-message body.
code
try
 { String s1="";
 File f1 = new File(the path);
 FileInputStream fstream = new FileInputStream(f1); //new
 BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
 int count=0;
 while((s1=br.readLine())!=null )
 count++;
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 StringTokenizer st = new StringTokenizer(s1,",");
 if ((st.hasMoreTokens())&&(count>1))
 String a=st.nextToken().trim();
 String b=st.nextToken();
 String c=st.nextToken();
 String d=st.nextToken();
 String e=st.nextToken();
 String f=st.nextToken();
 String g=st.nextToken();
 String h=st.nextToken();
 String i=st.nextToken();
 String j=st.nextToken();
 String k=st.nextToken();
 String l=st.nextToken();
 String m=st.nextToken();
 String n=st.nextToken();
 String o=st.nextToken();
 String p=st.nextToken();
 String q=st.nextToken();
 String mail=st.nextToken();
 String s=st.nextToken();
 //out.println("b="+b+"c="+c+"d="+d+"e="+e+"f="+f+"mail="+mail);
 %>
<%
 String to =mail;
 String from =request.getParameter("fromadd");
 String subject ="Statement of Expenses";
 String smtp ="mail.xxxxxxxxxx.com";
 String message="";
 message=message.concat("EMP ID");
 message=message.concat(" ");
 message=message.concat("Name");
 message=message.concat(" ");
 message=message.concat("Dept No.");
 message=message.concat(" ");
 message=message.concat("Acc No.");
 message=message.concat(" ");
 message=message.concat("*****************************************************************************************");
 message=message.concat(a);
 message=message.concat(" ");
 message=message.concat(b);
 message=message.concat(" ");
 message=message.concat(c);
 message=message.concat(" ");
 message=message.concat(d);
 Properties props = System.getProperties();
 // Puts the SMTP server name to properties object
 props.put("mail.smtp.host", smtp);
 // Get the default Session using Properties Object
 Session session1 = Session.getDefaultInstance(props, null);
 // Create a New message
 MimeMessage msg = new MimeMessage(session1);
 // Set the From address
 msg.setFrom(new InternetAddress(from));
 // Setting the "To recipients" addresses
 msg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to, false));
 /* // Setting the "cc recipients" addresses
 msg.setRecipients(Message.RecipientType.CC,InternetAddress.parse(cc, false));
 // Setting the "Bcc recipients" addresses
 msg.setRecipients(Message.RecipientType.BCC,InternetAddress.parse(bcc, false)); */
 // Sets the Subject
 msg.setSubject(subject);
 // set the meaasge in HTML format
 msg.setContent(message,"text/plain");
 // Set the Date: header
 msg.setSentDate(new java.util.Date());
 // Send the message
 Transport.send(msg);
 // Display Success message
 result =result.concat("<tr><td>"+b+"</td>"+"<td>"+to+"</td></tr>");
 }//end of if of hasmore element
 }// end of while loop
 out.println(result);
}catch(Exception e)
 // If here, then error in sending Mail. Display Error message.
 result="Unable to send your message";
 out.println("e="+e);
Any help will be appreciated.
Thanks and regards.
Ashvini

<html>

MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText("Your Messages");
MimeBodyPart mbp2 = new MimeBodyPart();
FileDataSource fds = new FileDataSource("Your Attachments");
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);
msg.setContent(mp);
msg.saveChanges();
msg.writeTo(System.out);
msg.setSubject(subject);
Transport.send(msg);

See you can add above code in your program and see the magic
Bye
regards--
Ashish
</html>

How to read a text file using Java

Guys,
Good day!
Please help me how to read a text file using Java and create/convert that text file into XML.
Thanks and God Bless.
Regards,
I-Talk

     public void fileRead(){
             File aFile =new File("myFile.txt");
         BufferedReader input = null;
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           while (( line = input.readLine()) != null){
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           ex.printStackTrace();
         catch (IOException ex){
           ex.printStackTrace();
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cheers
Mohammed Jubaer Arif.

How can I read text files from LAN if I only know the hostname?

I'm new in Java Developing, and dont know the written classes yet. I need help, how to do the following steps?
1. How can I read text files from LAN if I only know the hostname, or IP address?
2. How to read lines from text files without read all lines from the beginning of file, just seek to a position.
(ex. how can I read the 120th line?)
Please help!
sorry for the bad english

I'm new in Java Developing, and dont know the written classes yet. I need help, how to do the following steps?
1. How can I read text files from LAN if I only know the hostname, or IP address?You need to know the URL of the file. You need to know the hostname, port, protocl and relative path.
The hostname is server, not file.
2. How to read lines from text files without read all lines from the beginning of file, just seek to a position.Use the seek() to get to a random byte.
(ex. how can I read the 120th line?)The only way to find the 120th line is to read the first 120 lines. You can use other file formats to find the 120th line without reading the whole file but to need to be able to detremine where the 120th line is

How to update cgicmd.dat file during runtime?

I'd like to know how do update cgicmd.dat file during runtime. For example, I run a report one.jsp as
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within this report there is a hyperlink to open another report named two.jsp.
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so I can create hyperlink as follows
srw.set_hyperlink('/reports/rwservlet?report=two.jsp'||
'&cmdkey=userinfo&DESTYPE=cache&mode=bitmap&desformat=htmlcss');
Thanks

To my knowledge the cgicmd.dat is only read when the OC4J starts, so you would have to come up with another solution. Using Single-Sign-On (SSO) is quite a good idea, and it's there for cases like this.
Regards,
Martin Malmstrom

How to read a text file through pl/sql

How to read a text file through pl/sql

pl/sql runs inside the database. so your file also should be on the database server file system for you to be able to read.
check out UTL_FILE package. This is the database package to read/write files on the database server.

How to update a text file?

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