Displaying a .txt file in a JTextArea

hello everyone, i was wondering if you could help me with a problem i have.
basically, i have to type a word in a TextField that corresponds to a filename. i.e. type in 'results' and that will correspond to a file called 'results.txt'. once i type in this word, i click a button and this will open the file 'results.txt' into a TextArea below.
I have been working on this for several days now. I can figure out how to open the file into the TextArea, but it displays the file in there straight away. I need to make it so that the button has to be pressed first and then displays it.
It also needs to be able to do more than just one file. I have several files in a folder and depending on what i type in the TextField depends on which file is displayed.
I would appreciate ANY help at all on this as I am struggling quite alot.
Thnk you in advance
Troy

correct me if it is a misunderstanding, but why don't you open the file (read in the content of a file in f.e. String text) , then you do a setText(text) ?
in order to find out what was typed in you can choose getText()
so far,
stefan gross

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-Steve
"portal developer" <[email protected]> wrote in message
news:40ae343d$[email protected]..
>
Hi, Can someone pls give a hint on how to do this:
One "book" type content created, with a doc file uploaded. The "publisher" for
this content is set to "sams".
create a content selector which retrieves only this (content) bookcorrectly.
>
create two portlets. one portlet with above content selector inserted,displays
the publisher name with a hyperlink.
I want the other portlet to display the contents of the file uploaded,for this
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How to display a .txt file?

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Try this... Note you need to add adequate exception trapping and detect special cases like the file being larger than the allocatable size of a character array (in which case you can't convert the file to a string and will need to 'display' the file in sections)...
import java.io.*;
public class LoadFile {
public static String fileToString(File file) throws IOException {
    char[] fileContents = new char[(int) file.length()];
    FileReader fr = new FileReader(file);
    if(fr.read(fileContents) != fileContents.length) {
      System.err.println("There was a problem reading the file contents");
      return null;
    else return new String(fileContents);
public static void main(String[] args) throws IOException {
    if(args.length != 1) System.err.println("Usage:\n\tjava LoadFile <filename>");
    else {
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Displaying a .txt file in a TextArea...

hello everyone, i was wondering if you could help me with a problem i have.
basically, i have to type a word in a TextField that corresponds to a filename. i.e. type in 'results' and that will correspond to a file called 'results.txt'. once i type in this word, i click a button and this will open the file 'results.txt' into a TextArea below.
I have been working on this for several days now. I can figure out how to open the file into the TextArea, but it displays the file in there straight away. I need to make it so that the button has to be pressed first and then displays it.
It also needs to be able to do more than just one file. I have several files in a folder and depending on what i type in the TextField depends on which file is displayed.
I would appreciate ANY help at all on this as I am struggling quite alot.
Thnk you in advance
Troy

below is what i have so far, but it has one error. Could u help me with that?
import java.awt.*;
import javax.swing.*;
import java.io.*;
public class NorthPanel extends JPanel
JTextArea instruct;
String str;
BufferedReader br;
public NorthPanel()
setBackground(Color.white);
instruct = new JTextArea(5,60);
instruct.setLayout(new FlowLayout(FlowLayout.CENTER));
instruct.setBorder(BorderFactory.createTitledBorder("Java Work"));
instruct.setLineWrap(true);
instruct.setWrapStyleWord(true);
instruct.setEditable(false);
readFileIntoTextArea();
add(instruct);
private void readFileIntoTextArea()
try {
File f = new File("readme.txt");
br = new BufferedReader (new FileReader(f));
while ((str = br.readLine()) != null)
instruct.append(str);
}

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i´ve developed a bsp page that uploads files using fm SO_DOCUMENT_INSERT_API1.
When i try to display a txt file uploaded as above explained (with transaction FB03) the document is displayed with sapoffice and not with notepad as i expected.
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What do i have to do so that a txt file is opened with notepad?
i´m able to upload a pdf and display it afterwards in fb03 with acrobat reader.
i´m able to upload a doc and display it afterwards in fb03 with msword.
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Best regards.
Edited by: Pablo Casamayor on Nov 19, 2011 12:02 PM

You should be doing something like this to open a text file in Notepad:
Message Edited by smercurio_fc on 09-12-2007 01:07 PM
Attachments:
Example_BD.png ‏2 KB

Reading a text File into a JTextArea

I know this is really basic question, but what is the best and/or simplest way to read text from a .txt file into a JTextArea? I'm new to Java and any help anyone can provide would be greatly appreciated.

it should be in quotes only if it is a string repersentation of a String class.
FileReader reader = new FileReader("readme.txt");
quotes are not needed if you write it this way
String filename = "readme.txt";
FileReader reader = new FileReader(filename);
...remember that String is a class and not a data type, it is also a special case in java where the class can act like a datatype in declarations.
I don't think anything else can behave like this in java
String text = "sometext";
"sometext".equals(text);
this returns true.

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How to get Text from (.txt) file to display in the JTextArea ?

How to get Text from (.txt) file to display in the JTextArea ?
is there any code please tell me i am begginer and trying to get data from a text file to display in the JTextArea /... please help...

public static void readText() {
try {
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I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?
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The problem is in the delimiters in your text file. By default, Read From Spreadsheet File.vi expects a tab delimited file. You can specify a delimiter (like a space), but Read From Spreadsheet File.vi has a problem with repeated delimiters: if you specify a single space as a delimiter and Read From Spreadsheet File.vi finds two spaces back-to-back, it stops reading that line. Your file (as I got it from your earlier post) is delimited by 4 spaces.
Here are some of your choices to fix your problem.
1. Change the source file to a tab delimited file. Your VI will then run as is.
2. Change the source file to be delimited by a single space (rather than 4), then wire a string constant containing one space to the delimiter input of Read From Spreadsheet File.vi.
3. Wire a string constant containing 4 spaces to the delimiter input of Read From Spreadsheet File.vi. Then your text file will run as is.
Depending on where your text file comes from (see more comments below), I'd vote for choice 1: a tab delimited text file. It's the most common text output of spreadsheet programs.
Comments for choices 1 and 2: Where does the text file come from? Is it automatically generated or manually generated? Will it be generated multiple times or just once? If it's manually generated or generated just once, you can use any text editor to change 4 spaces to a tab or to a single space. Note: if you want to change it to a tab delimited file, you can't enter a tab directly into a box in the search & replace dialog of many programs like notepad, but you can do a cut and paste. Before you start your search and replace (just in the text window of the editor), press tab. A tab character will be entered. Press Shift-LeftArrow (not Backspace) to highlight the tab character. Press Ctrl-X to cut the tab character. Start your search and replace (Ctrl-H in notepad in Windows 2000). Click into the Find What box. Enter four spaces. Click into the Replace With box. Press Ctrl-V to paste the tab character. And another thing: older versions of notepad don't have search and replace. Use any editor or word processor that does.

Want to display a space after last field in the output txt file

hi
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hi Atish
i am using
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EXPORTING
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USE_BUFFER                    = ' '
ELEMINATE_BLANKS              = 'X'
IMPORTING
EMERGENCY_FLAG                =
FILE_FORMAT                   =
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EXCEPTIONS
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2006 Ultimate LabVIEW G-eek.
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01:17:12;18 01:17:20;26 00:00:08;09 Ç±ÇÍÇÁÇÃÉCÉìÉåÉbÉgÇÇøÇÂÇ¡Ç∆âÒÇ¡ÇƒÇ≥ÅAÇ¢ÇÎÇÒÇ»É]Å[ÉìÇ÷Ç¢Ç¡ÇƒÇ›ÇƒÇsÇÖÇíÇíÇÅÇâÇéÇ ÷Ç‡Ç¡Ç∆ãﬂÇ≠çsÇ¡ÇƒÇ≥ÅAÉwÉäÇÃñ≥ë éûä‘Çè≠Ç»Ç≠Ç∑ÇÈÅB
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