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;
            while((lineRead = input.readLine()) != null)
                lineCount ++;
                String result = request.getParameter("question" + lineCount);
                output.write(result + ",");
                output.write("\n");

Heres the part of the code that writes to a text
file
String lineRead = "";
int lineCount = 0;
while((lineRead = input.readLine()) !=
adLine()) != null)
lineCount ++;
String result =
String result = request.getParameter("question" +
lineCount);
output.write(result + ",");
output.write("\n");
Can you do output.writeln(result + ",");?
Failing that, putting output.write("\n") inside the while loop should do the trick.

Similar Messages

CLIENT_TEXT_IO : cannot insert new line into a text file

Facts:
Developer 10g
AS 10g
Web utility
Problem:
i am traying to
Open a text file. using CLIENT_TEXT_IO.FOPEN
insert a record in to a text file using CLIENT_TEXT_IO.PUTF
insert a new line using chr(10) or CLIENT_TEXT_IO.NEW_LINE
or CLIENT_TEXT_IO.put_line
insert the next record
Close the file.
all work except insert a new line
Why !!!
it was Working fine in 6i, but now in 10g and Webutil is not working
plz help

Hi you can put a new line in a text file using System.getProperty("line.separator"). This implementation will work for every OS.
import java.io.*;
class Demo{
public static void main(String args[]) throws Exception {
FileWriter fr = new FileWriter("FileDemo.txt");
fr.write("AAAAAAAAAA");
fr.write(System.getProperty("line.separator"));
fr.write("AAAAAAAAAAA");
fr.close();
}

How to insert new line in a text file

hi all,
i wnat to know how can i insert a new line in a text file using java.
for example i want the formate of the text like this
1 2 3
4 5 6
until now i know only how to insert data but not new line.
Thanks in advandce

Hi you can put a new line in a text file using System.getProperty("line.separator"). This implementation will work for every OS.
import java.io.*;
class Demo{
public static void main(String args[]) throws Exception {
FileWriter fr = new FileWriter("FileDemo.txt");
fr.write("AAAAAAAAAA");
fr.write(System.getProperty("line.separator"));
fr.write("AAAAAAAAAAA");
fr.close();
}

Want to know how to check for new line character in text file

Hi All,
I`m trying to read data from text file. However I`m not sure whether the data is in 1st line or nth line. Now I`m trying to read the text from the readline. But if text is "" and not NULL then my code fails. So I want to know how to check for new line character and go to next line to find the data. Please help.
Thanks
static int readandwriteFile(Logger logger,String filepath){
          BufferedWriter out = null;
          BufferedReader in = null;
          File fr = null;
          int get_count = 0;
          try     {
          if(new File(filepath).exists())
          fr= new File(filepath);
                    System.out.println("FileName: "+fr);
               if(fr != null){
in = new BufferedReader(new FileReader(fr));
                         String text = in.readLine();
                         if(text != null){
                         get_count = Integer.parseInt(text);
                         in.close();
                         else{
                              get_count = 0;
     else{
out = new BufferedWriter(new FileWriter(filepath));
     out.write("0");
            out.close();
               }          //Reading of the row count file ended.
          catch(Exception e) {
               e.printStackTrace();
          finally {
               try{               if (in != null) {
                         in.close();
          if (out != null) {
                         out.close();
          catch(Exception e) {
                    e.printStackTrace();
          return get_count;
     }

You are calling the readline() only once which means you are reading only the first line from the file...
Use a loop (Do-While preferably)
do{
//your code
}while(text == "")

Inserting new line to a text file at position #

Hi,.
Is it possible to do this in java?
1. Open a new text File (woutFile)
2. woutFile.write(" line #1\r\n"); // write new line
3. woutFile.write(" line #2\r\n"); // write new line
4.woutFile.write(" line #3\r\n"); // write new line
5. Go to line #2 position on a text file
6. Insert NEW LINE between line #2 and Line #3
7. move to the end-of-file
8.Close the file
Please help

Is it possible to do this? please look at question
inside comments.Your question has already been answered. Beyond that,
if you have some code and you want to know if it will
work, then run it and see.The answer was no. It's one of the fundamental properties of files that you cannot insert content in the middle, just at the end. To insert content you first have to make room for it. In this respect a file works like an array and not like a linked list.

Add header line to the text file in receiver file adapter

Hello Experts,
I have to add a new line to the text file generated at the receiver end.
My structure is
Record
   Item......0-unbounded
         field1
         field2
         field3
I have defined below parameters in receiver FCC.
RecordSet Structure : Record,Item
Item.fieldSeparator : ;
Record.fieldSeparator : nl
Record.endSeparator : '0x0D''0x0A' ( this is to get a carriage return at the end of the file)
Item.addHeaderLine : 1
With the above configuration, i am getting the desired output with NO header line.
Please help.
Thanks,
Swetha.

Hi, it looks like that the headerline "specification is only permitted if exactly one structure is defined." Please check [SAP help under Define Parameters for Recordset Structures|http://help.sap.com/saphelp_nw73/helpdata/en/44/686e687f2a6d12e10000000a1553f6/frameset.htm].
One solution would be to generate the header fields in the message payload. Generate an additional first line containing the header names, e.g.
<Item>
<field1>Header1
<field2>Header2
<field3>Header3

How to provide space and new line to the text in AI Script

how to provide space and new line to the text in AI Script

?? can you explain better, can you at least add another sentence?
space
var mySpace = " ";
new line
var newLine = "\n";

Reading a Random Line from a Text File

Hello,
I have a program that reads from a text file words. I currently have a text file around 800KB of words. The problem is, if I try to load this into an arraylist so I can use it in my application, it takes wayy long to load. I was wondering if there was a way to just read a random line from the text file.
Here is my code, and the text file that the program reads from is called 'wordFile'
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class WordColor extends JFrame{
     public WordColor(){
          super("WordColor");
          setSize(1000,500);
          setVisible(true);
          add(new WordPanel());
     public static void main(String[]r){
          JFrame f = new WordColor();
class WordPanel extends JPanel implements KeyListener{
     private Graphics2D pane;
     private Image img;
     private char[]characterList;
     private CharacterPosition[]positions;
     private int charcounter = 0;
     private String initialWord;
     private File wordFile = new File("C:\\Documents and Settings\\My Documents\\Java\\projects\\WordColorWords.txt");
     private FontMetrics fm;
     private javax.swing.Timer timer;
     public final static int START = 20;
     public final static int delay = 10;
     public final static int BOTTOMLINE = 375;
     public final static int buffer = 15;
     public final static int distance = 4;
     public final static Color[] colors = new Color[]{Color.red,Color.blue,Color.green,Color.yellow,Color.cyan,
                                                                      Color.magenta,Color.orange,Color.pink};
     public static String[] words;
     public static int descent;
     public static int YAXIS = 75;
     public static int SIZE = 72;
     public WordPanel(){
          words = readWords();
          setLayout(new BorderLayout());
          initialWord = getWord();
          characterList = new char[initialWord.length()];
          for (int i=0; i<initialWord.length();i++){
               characterList[i] = initialWord.charAt(i);
          setFocusable(true);
          addKeyListener(this);
          timer = new javax.swing.Timer(delay,new ActionListener(){
               public void actionPerformed(ActionEvent evt){
                    YAXIS += 1;
                    drawWords();
                    if (YAXIS + descent - buffer >= BOTTOMLINE) lose();
                    if (allColorsOn()) win();
     public void paintComponent(Graphics g){
          super.paintComponent(g);
          if (img == null){
               img = createImage(getWidth(),getHeight());
               pane = (Graphics2D)img.getGraphics();
               pane.setColor(Color.white);
               pane.fillRect(0,0,getWidth(),getHeight());
               pane.setFont(new Font("Arial",Font.BOLD,SIZE));
               pane.setColor(Color.black);
               drawThickLine(pane,getWidth(),5);
               fm = g.getFontMetrics(new Font("Arial",Font.BOLD,SIZE));
               descent = fm.getDescent();
               distributePositions();
               drawWords();
               timer.start();
          g.drawImage(img,0,0,this);
     private void distributePositions(){
          int xaxis = START;
          positions = new CharacterPosition[characterList.length];
          int counter = 0;
          for (char c: characterList){
               CharacterPosition cp = new CharacterPosition(c,xaxis, Color.black);
               positions[counter] = cp;
               counter++;
               xaxis += fm.charWidth(c)+distance;
     private void drawThickLine(Graphics2D pane, int width, int thickness){
          pane.setColor(Color.black);
          for (int j = BOTTOMLINE;j<BOTTOMLINE+1+thickness;j++){
               pane.drawLine(0,j,width,j);
     private void drawWords(){
          pane.setColor(Color.white);
          pane.fillRect(0,0,getWidth(),getHeight());
          drawThickLine(pane,getWidth(),5);
          for (CharacterPosition cp: positions){
               int x = cp.getX();
               char print = cp.getChar();
               pane.setColor(cp.getColor());
               pane.drawString(""+print,x,YAXIS);
          repaint();
     private boolean allColorsOn(){
          for (CharacterPosition cp: positions){
               if (cp.getColor() == Color.black) return false;
          return true;
     private Color randomColor(){
          int rand = (int)(Math.random()*colors.length);
          return colors[rand];
     private void restart(){
          charcounter = 0;
          for (CharacterPosition cp: positions){
               cp.setColor(Color.black);
     private void win(){
          timer.stop();
          newWord();
     private void newWord(){
          pane.setColor(Color.white);
          pane.fillRect(0,0,getWidth(),getHeight());
          repaint();
          drawThickLine(pane,getWidth(),5);
          YAXIS = 75;
          initialWord = getWord();
          characterList = new char[initialWord.length()];
          for (int i=0; i<initialWord.length();i++){
               characterList[i] = initialWord.charAt(i);
          distributePositions();
          charcounter = 0;
          drawWords();
          timer.start();
     private void lose(){
          timer.stop();
          pane.setColor(Color.white);
          pane.fillRect(0,0,getWidth(),getHeight());
          pane.setColor(Color.red);
          pane.drawString("Sorry, You Lose!",50,150);
          repaint();
          removeKeyListener(this);
          final JPanel p1 = new JPanel();
          JButton again = new JButton("Play Again?");
          p1.add(again);
          add(p1,"South");
          p1.setBackground(Color.white);
          validate();
          again.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent evt){
                    remove(p1);
                    addKeyListener(WordPanel.this);
                    newWord();
     private String getWord(){
          int rand = (int)(Math.random()*words.length);
          return words[rand];
     private String[] readWords(){
          ArrayList<String> arr = new ArrayList<String>();
          try{
               BufferedReader buff = new BufferedReader(new FileReader(wordFile));
               try{
                    String line = null;
                    while (( line = buff.readLine()) != null){
                         line = line.toUpperCase();
                         arr.add(line);
               finally{
                    buff.close();
          catch(Exception e){e.printStackTrace();}
          Object[] objects = arr.toArray();
          String[] words = new String[objects.length];
          int count = 0;
          for (Object o: objects){
               words[count] = (String)o;
               count++;
          return words;
     public void keyPressed(KeyEvent evt){
          char tempchar = evt.getKeyChar();
          String character = ""+tempchar;
          if (character.equalsIgnoreCase(""+positions[charcounter].getChar())){
               positions[charcounter].setColor(randomColor());
               charcounter++;
          else if (evt.isShiftDown()){
               evt.consume();
          else{
               restart();
          drawWords();
     public void keyTyped(KeyEvent evt){}
     public void keyReleased(KeyEvent evt){}
class CharacterPosition{
     private int xaxis;
     private char character;
     private Color color;
     public CharacterPosition(char c, int x, Color col){
          xaxis = x;
          character = c;
          color = col;
     public int getX(){
          return xaxis;
     public char getChar(){
          return character;
     public Color getColor(){
          return color;
     public void setColor(Color c){
          color = c;
}

I thought that maybe serializing the ArrayList might be faster than creating the ArrayList by iterating over each line in the text file. But alas, I was wrong. Here's my code anyway:
class WordList extends ArrayList<String>{
long updated;
WordList readWordList(File file) throws Exception{
WordList list = new WordList();
BufferedReader in = new BufferedReader(new FileReader(file));
String line = null;
while ((line = in.readLine()) != null){
    list.add(line);
in.close();
list.updated = file.lastModified();
return list;
WordList wordList;
File datFile = new File("words.dat");
File txtFile = new File("input.txt");
if (datFile.exists()){
ObjectInputStream input = new ObjectInputStream(new FileInputStream(datFile));
wordList = (WordList)input.readObject();
if (wordList.updated < txtFile.lastModified()){
    //if the text file has been updated, re-read it
    wordList = readWordList(txtFile);
    ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream(datFile));
    output.writeObject(wordList);
    output.close();
} else {
//serialized list does not exist--create it
wordList = readWordList(txtFile);
ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream(datFile));
output.writeObject(wordList);
output.close();
}The text file contained one random sequence of letters per line. For example:
hwnuu
nhpgaucah
zfbylzt
hwnc
gicgwkhStats:
Text file size: 892K
Serialized file size: 1.1MB
Time to read from text file: 795ms
Time to read from serialized file: 1216ms

Delete lines from a text file

i need to delete (or replace them with white space) a few lines from a text file. I have a text file with first few lines & last few lines containing "<"or ">". I need to delete/replace with white space, the entire line. i need to do this urgently
Could some one please tell me how to do this?

the file can be of size 8MB or more. i get this file
every week from a third party. So the size is not
constant. I need to remove/replace with white space,
the fist & last few lines and the rest is comma
seperated values which i need to load to database
using sqlldr. But still not sure abt how to remove
the first few lines.
i need to read this file, replace the lines as i read
them and write the replaced string back to the file &
then load the rest of lines to database.8 MByte is fairly small. Read the file a line at a time and copy to a new file only the lines you want. Should take no more than a second or so.
P.S. It will probably be a mistake if you try to edit the original file in place.

Reading one line from a text file into an array

i want to read one line from a text file into an array, and then the next line into a different array. both arays are type string...i have this:
public static void readAndProcessData(FileInputStream stream){
     InputStreamReader iStrReader = new InputStreamReader (stream);
     BufferedReader reader = new BufferedReader (iStrReader);
     String line = "";
     try{
     int i = 0;
          while (line != null){
               names[i] = reader.readLine();
               score[i] = reader.readLine();
               line = reader.readLine();
               i++;
          }catch (IOException e){
          System.out.println("Error in file access");
this section calls it:
try{
     FileInputStream stream = new FileInputStream("ISU.txt");
          HighScore.readAndProcessData(stream);
          stream.close();
          names = HighScore.getNames();
          scores = HighScore.getScores();
     }catch(IOException e){
          System.out.println("Error in accessing file." + e.toString());
it gives me an array index out of bounds error

oh wait I see it when I looked at the original quote.
They array you made called names or the other one is prob too small for the amount of names that you have in the file. Hence as I increases it eventually goes out of bounds of the array so you should probably resize the array if that happens.

Random Line reading in text file

I am trying to read a random line in a text file but every time i read it it reads first line of the file any one can help me what is the problem in the code is or provide me with a new code.
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
               File file = new File("word.txt");
               if(!file.exists())
                    System.out.println("File does not exist.");
                    System.exit(0);
               try{
                    //Open the file for reading
                    RandomAccessFile raf = new RandomAccessFile(file, "r");
raf.seek(file.length());     //Seek to end of file
                    System.out.println("Read full line: " + raf.readLine());
//str2 is a String
                    str2 = str2 + raf.readLine();
                    System.out.println(""+str2);
                    raf.close();
                    System.out.println("Successfully");
               catch(IOException ioe)
                    System.out.println(ioe.getMessage());
my text file look like in this format
mind
hate
Abhor
Bigot
narrow
prejudiced
person
Counterfeit
fake
false
give
voting
rights
Hamper
hinder
obstruct
Kindle
to
start
fire
harmful
poisonous
lethal

Next time when posting code, please use code tags: http://forum.java.sun.com/help.jspa?sec=formatting
A RandomAccessFile has nothing to do with getting a (pseudo) random line number from a file.
You should also split things up in separate methods:
- a method for counting the number of lines in a file;
- a method to get the N-th line from a file.
In your main method, you call the method which counts the number of lines N in a file and then generate a (pseudo) random number between 1 and N. Use the java.util.Random class for this.
When you have generated that number, call the other method to get that specific line number.
Here's a small start:
import java.io.*;
import java.util.*;
public class Main {
    public static String getLineNumber(int number) throws FileNotFoundException {
        // your code here
    public static int countLines(String fileName) throws FileNotFoundException {
        // your code here
    public static void main(String[] args) throws Exception {
        int numberLines = countLines("word.txt");
        Random generator = new Random();
        int randomNumber = generator.nextInt(numberLines)+1;
        String randomLine = getLineNumber(randomNumber);
        System.out.println("Line "+randomNumber+" = '"+randomLine+"'");
}In both methods, you can use the java.util.Scanner class to read lines from the file.
Have a look at the API docs of the Scanner class:
http://java.sun.com/j2se/1.5.0/docs/api/java/util/Scanner.html (including code samples!)
Good luck.

File adapter-How to set line break in text file-split record into two lines

Dear Guru's,
I have to solve following problem with XML (with mulitiple records) to TEXT file scenario using file adapter. I have to output for ever ONE data record in XML always two identical lines in text file. Second line should have a little bit different mapping in few fields like date,... So I did duplicate fileds in my output structure in mapping and need to know how to set line break in the middle and see half of structure in first line and next structure half in second line
My output structure in mapping is:
CASHFLOW
- INTERFACE
- GESELLSCHAFT
- ANWENDUNG
- PRODUKT
- VERTRAG
- BETRAG
- WAEHRUNG
- DIRECTION
- BEWEGUNGSTYP
- FAELLIGKEIT
- ZINSFESTSTELLUNG
- ZAHLUNGSTAG
- RENDITE
- INTERFACE2
- GESELLSCHAFT2
- ANWENDUNG2
- PRODUKT2
- VERTRAG2
- BETRAG2
- WAEHRUNG2
- DIRECTION2
- BEWEGUNGSTYP2
- FAELLIGKEIT2
- ZINSFESTSTELLUNG2
- ZAHLUNGSTAG2
- RENDITE2
Question is how can I set on receiving file adapter in Content Conversion Parameters that fields from first structure half INTERFACE...RENDITE should be outputed in one line and fields from second half of structure INTERFACE2...RENDITE2 should start on second line in final text file.
I'm getting at the moment one line only and I need to know how can set line break so that second line starting with INTERFACE2(CA)...RENDITE2 will start in new line.
CA,"0100","7","512",20090127010001,-12454762586.6800,"EUR",2,12,2009-01-28,2009-01-27,2009-01-28,"0.0000000",CA,"0100","7","512",20090127010001,-12454762586.6800,"EUR",1,10,2009-01-27,2009-01-27,2009-01-27,"0.0000000"
This should be final output:
CA,"0100","7","512",20090127010001,-12454762586.6800,"EUR",2,12,2009-01-28,2009-01-27,2009-01-28,"0.0000000"
CA,"0100","7","512",20090127010001,-12454762586.6800,"EUR",1,10,2009-01-27,2009-01-27,2009-01-27,"0.0000000"
My file adapter settings:
RecordsetStructure=CASHFLOW
CASHFLOW.fieldNames=INTERFACE,GESELLSCHAFT,ANWENDUNG,PRODUKT,VERTRAG,BETRAG,WAEHRUNG,DIRECTION,BEWEGUNGSTYP,FAELLIGKEIT,ZINSFESTSTELLUNG,ZAHLUNGSTAG,RENDITE
CASHFLOW.fieldSeparator=,
CASHFLOW.endSeparator='nl'
CASHFLOW.fieldNames=INTERFACE2,GESELLSCHAFT2,ANWENDUNG2,PRODUKT2,VERTRAG2,BETRAG2,WAEHRUNG2,DIRECTION2,BEWEGUNGSTYP2,FAELLIGKEIT2,ZINSFESTSTELLUNG2,ZAHLUNGSTAG2,RENDITE2
CASHFLOW.fieldSeparator=,
It wont help if I add two identical structures in mapping because in output i would see for multiple entries section with first lines only and after that section with second lines only. And CASHFLOW is one part of more complex mapping ...
(This is final output structure RecordsetStructure=HEADER,CASHFLOW,CONDITION,REFERENCE,CONTRACT - more sections with different data and all these should have duplicate lines at the end)
Thanks a lot for any help
Cheers
Marian
Edited by: Marian Luscon on Jul 14, 2009 11:44 AM

Hi Ivan,
right, I did test just for sure.
Putting constant 'nl' into field CASHFLOW-INTERFACE1 didnt help - still getting one line instead two lines.
CA ,"0100" ,"7" ,"512" ,20090127GTP101 ,-12454762586.6800 ,"EUR" ,2 ,12 ,2009-01-28 ,2009-01-27 ,2009-01-28 ,"0.0000000" ,'nl' ,"GTP1" ,"7" ,"512" ,20090127GTP101 ,-12454762586.6800 ,"EUR" ,1 ,10 ,2009-01-27 ,2009-01-27 ,2009-01-27 ,"0.0000000"
So there is still question. Is there any way (mapping,...) how to output always 2 lines in text file for one record in XML. It always does 1 record in mapping structure = 1 line but we need 2 lines ...
Example:
Input: 4 records in XML
Output: 8 lines in final text file ...
Thanks to you all guys
Marian

Change of a single line in a text file

Is there a option in CVI to change a single line in a text file (.txt), without reading the whole text file into the buffer and writing the whole buffer back after the editing from the one line?

Not that I am aware of.
I'll be glad to know such a function if somebody can point us to it!
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

How can I find out the number of lines in a text file?

How can I find out the number of lines in a text file?

java.io.BufferedReader in = new java.io.BufferedReader( new java.io.FileReader( "YourFile.txt" ) );
int lineCount = 0;
while( in.readLine() != null )
lineCount ++;
System.out.println( "Line Count = " + lineCount );

How to read every line from a text file???

How can i read every line from my text file ("eka.txt")
now it only reads the first line and prints it out.
What is wrong with this?
import java.io.*;
import java.util.*;
class Testi{
     public static void main(String []args)throws IOException {
     BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
File inputFile = new File ("eka.txt");
FileReader fis =new FileReader(inputFile);
BufferedReader bis = new BufferedReader(fis);
String test=bis.readLine();
String tmp= "";
while((bis.readLine().trim() != null)) {
int spacefound=0;
int l=test.indexOf(" ");
     for(int i=0;i<test.length();i++){
     char c=test.charAt(i);
     if(c!=' ') tmp+=""+c;
     if(c==' ' && (spacefound<1) && !(tmp.equals(""))){
     tmp+=""+c;
     spacefound++;
     if(tmp.length()==l) {
     System.out.println(tmp);
     tmp="";
     spacefound=0;
     if(tmp.length()<l){
     for(int i=0;i<=(l-tmp.length());i++)
     tmp+=""+' ';
     System.out.println(tmp);

Try this code, Hope it servers your purpose.
import java.io.*;
import java.util.*;
class Testi {
     public static void main(String []args)throws IOException {
          BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
          File inputFile = new File ("Eka.txt");
          FileReader fis =new FileReader(inputFile);
          BufferedReader bis = new BufferedReader(fis);
          String test=bis.readLine();
          while(test != null) {
               StringTokenizer st = new StringTokenizer(test," ");
               while(st.hasMoreTokens())
                    System.out.println(st.nextToken());
               test = bis.readLine();
}Sudha

Writing to a new line in a text files

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