How do you read data from a text file into a JTextArea?

I'm working on a blogging program and I need to add data from a text file named messages.txt into a JTextArea named messages. How do I go about doing this?

Student_Coder wrote:
1) Read the file messages.txt into a String
2) Initialize messages with the String as the textSwing text components are designed to use Unix-style linefeeds (\n) as line separators. If the text file happens to use a different style, like DOS's carriage-return+linefeed (\r\n), it needs to be converted. The read() method does that, and it saves the info about the line separator style in the Document so the write() method can re-convert it.
lethalwire wrote:
They have 2 different ways of importing documents in this link:
http://java.sun.com/docs/books/tutorial/uiswing/components/editorpane.html
Neither of those methods applies to JTextAreas.

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Hi Milan,
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Adding data from a text file into a JTextArea

I'm working on a blogging program and I need to add data from a text file named messages.txt into a JTextArea named messages. How do I go about doing this?

then you need to be more specific in what you need help with because those are two commonly used options for reading data in from a file. what have you tried? where is your code failing? what kind of errors are you getting? of course it looks like others in the forum have already reprimanded you for failing to post properly.
i have used both FileReader and the nio package for cfg and ini files which are both just txt files as well as massive data files. so tell me how they dont help you?

Reading data from a text file into PAS - Dimension member names truncated

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Hi Lungile,
The problem that you're likely having is that you haven't created a file description for the file from which you're reading. When loading data into Application Server from a text file, you would normally go through three steps:
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Reading data from a text file into a JTextField

So I am writing a program that will write to and read from a large database. I was hoping to allow a graphical interface for the reading of the data, but I keep getting an error;
Incompatible Types
Found: java.lang.string
Required: javax.swing.JTextField
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BufferedReader r;
try {
r = new BufferedReader(new FileReader("C:\\temp\\test.txt"));
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array[i] = thisLine;
i = i + 1
and then assigning each JTextField it's own array slot?*
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Try something like this for putting the text in a control:
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class Junk{
String[] s = {"This is String 1.", "This is String 2.", "This is String 3."};
Junk(){
public void makeIt(){
    JFrame j = new JFrame("Forum Junk");
    j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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    p.add(jt);
    j.add(p);
    jt.setText(s[0]);
    jt.append("\n\r"+s[1]);
    jt.append("\n\r"+s[2]);
    j.pack();
    j.setVisible(true);
public static void main(String[] args) {
    Junk j = new Junk();
    j.makeIt();
}Depending on your design you may be able to do away with your array and append the text directly to the JTextArray after each line is read.

Read data from a text file, one line at a time.

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The Read from Text File.vi reads data from a text file line by line until the user stops the VI manually with the Stop button on the front panel, or until an error (such as "Error 4, End of file") occurs. If an error occurs, the Simple Error Handler.vi pops up a dialog that tells you which error occurred.
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If you need something more dynamic because the number of lines in your files vary, then you could change the code of the Read from Text File.vi to the expect "Error 4, End of file" and handle it appropriately. This would require unbundling the error cluster that comes fro
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Best of Luck,
Dieter
Dieter Schweiss
Applications Engineer
National Instruments

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It's not possible to read from a file without using classes from the core API*. You'll have to get clarification from your instructor as to which classes are and are not allowed.
[http://java.sun.com/docs/books/tutorial/essential/io/]
*Unless you write a bunch of JNI code to replicate what the java.io classes are doing.

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HI Martin,
i am not realy sure what you want!?!?
i think you want to display only a part of the values you read from XYZ
so what you can do:
write all the values in an array.
the size of the array is the max. value of the slide bar
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the other option is to use the history function of the graphes
regards
timo

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I am trying to load a the data from a text file on the local work-station. The data is not being read.
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It's not possible to read from a file without using classes from the core API*. You'll have to get clarification from your instructor as to which classes are and are not allowed.
[http://java.sun.com/docs/books/tutorial/essential/io/]
*Unless you write a bunch of JNI code to replicate what the java.io classes are doing.

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Hello,
I need help with importing data from a .csv file with comma delimiter into a table.
I've been struggling to figure out how to use the "Import from Files" wizard in Oracle 10g web-base Enterprise Manager.
I have not been able to find a simple instruction on how to use the Wizard.
I have looked at the Oracle Database Utilities - Overview of Oracle Data Pump and the Help on the "Import: Files" page.
Neither one gave me enough instruction to be able to do the import successfully.
Using the "Import from file" wizard, I created a Directory Object using the Create Directory Object button. I Copied the file from which i needed to import the data into the Operating System Directory i had defined in the Create Directory Object page. I chose "Entire files" for the Import type.
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For step 2 of 4, "Import:Options" page, I selected the same directory object i had created.
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I submitted the job and I got ORA-31619 invalid dump file error.
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I tried to use the "imp" utility in command-line window.
After I entered (imp), i was prompted for the username and the password and then the buffer size as soon as i entered the min buffer size I got the following error and the import was terminated:
C:\>imp
Import: Release 10.1.0.2.0 - Production on Fri Jul 9 12:56:11 2004
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Username: user1
Password:
Connected to: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - Produc
tion
With the Partitioning, OLAP and Data Mining options
Import file: EXPDAT.DMP > c:\securParms\securParms.csv
Enter insert buffer size (minimum is 8192) 30720> 8192
IMP-00037: Character set marker unknown
IMP-00000: Import terminated unsuccessfully
Please show me the easiest way to import a text file into a table. How complex could it be to do a simple import into a table using a text file?
We are testing our application against both an Oracle database and a MSSQLServer 2000 database.
I was able to import the data into a table in MSSQLServer database and I can say that anybody with no experience could easily do an export/import in MSSQLServer 2000.
I appreciate if someone could show me how to the import from a file into a table!
Thanks,
Mitra

>
I can say that anybody with
no experience could easily do an export/import in
MSSQLServer 2000.
Anybody with no experience should not mess up my Oracle Databases !

Reading Data From A Text File via AppleScript

Here is my question. I have a text file I need to read data from....this is what the text file looks like opened in text editor:
"SLUG
, 06/16/06, APPLE COMPUTER INC , 69x8.50, jondnotin
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PowerMac G5, iBook G4, Intel MacMini, PowerMac G3 B&W, iMac DV Blueberry Mac OS X (10.4.7)

Hello
You where right for the file structure.
I think that it is a complementary reason to locate the data whithout assuming that it sit in paragraph x or y.
The trailing script get rid of that and allow to grab values from a file containing more than a single entry.
--[SCRIPT]
set leChemin to "Macintosh HD:Users:yvankoenig:Desktop:_testfile.txt"
set {val1, val2} to my decipher(read file leChemin, "APPLE COMPUTER INC , ")
display dialog "" & val1 & return & val2
-- -+-+-+-+-+-+-+-
on decipher(t, d)
set {oTID, AppleScript's text item delimiters, texte} to {AppleScript's text item delimiters, d, t}
set {texte, AppleScript's text item delimiters} to {text item 2 of texte, ","}
set {texte, AppleScript's text item delimiters} to {text item 1 of texte, "x"}
set {v1, v2, AppleScript's text item delimiters} to {text item 1 of texte, text item 2 of texte, oTID}
return {v1, v2}
end decipher
-- -+-+-+-+-+-+-+-
--[/SCRIPT]
Yvan KOENIG (from FRANCE vendredi 8 septembre 2006 20:38:46)

How to automate loading data from a text file ?

Hi,
I need to load a data form a text file automatically. (for example: every day at 6.p.m) .
It is possible to use DBMS_SCHEDULER with SQL LOADER ? or maybe u have others idea ?
regards,

assuming that the text file resides at the machine where the database is installed at you can create a procedure that use the built-in UTL_FILE package to read and load the data to the oracle tables. then create a job that use the DBMS_JOB or DBMS_SCHEDULER to create an automated schedule to run the job that calls the procedure you have created.
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Reading data from a text file but can't use the data outside of the function.

I am trying to load a variable from data in a text file.
I can read the text file fine but the variable data seems
only to be available with in the function that reads it.
I need to use the variable data outside of the function.
Does anyone have any suggestions to work around this issue?
This is the actionscript code i'm using.
var pathVars= new LoadVars();
pathVars.onLoad=function(ok) {
if(ok)
trace("Loading");
path_var=pathVars.path;
trace("This is within the function "+path_var);
pathVar0="This is within the function... "+path_var;
Yet the path_var is available here fine.
pathVars.load("mypath.txt");
This is where the path_var becomes undefined
trace("This is outside the function... "+path_var);
pathVar1="This is outside the function... "+path_var;
This
is a download link for the FLA zip file
This
is a demo of the script loading the text file

The external traces are being executed before the file is
loaded.

How do you read data from a text file into a JTextArea?

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