Program to read only specific words in each Line in a text file

Hi
I have a question
I need to write a program where the program must read only specific words in each line
I will give you an example...
PSAPPSRV.21201 1-42 13.35.54 238.360 Cur#1.HDEV RC=0 Dur=0.000 COM Stmt=SELECT VERSION FROM PSVERSION WHERE OBJECTTYPENAME = 'SYS'
PSAPPSRV.21201 1-43 13.35.54 0.040 Cur#2.HDEV RC=0 Dur=0.000 COM Stmt=SELECT STYLESHEETNAME FROM PSOPTIONS
These are two lines in my text file...now I need to read only the SQL statements present that is both SELECT statements.. Can you please suggest a method.......

My first reaction to the question is why would you want such thing, but may be I am unknown :)
Assuming you have the text as string, I mean
String str = "PSAPPSRV.21201 1-42 13.35.54 238.360 Cur#1.HDEV RC=0 Dur=0.000 COM Stmt=SELECT VERSION FROM PSVERSION WHERE OBJECTTYPENAME = \'SYS\'";you can obtain the sql statement using substring method like
String result = str.substring(str.indexOf("SELECT")); Again I assume there is no word SELECT preceding and the word SELECT is all caps.

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Read the first word of each line in a text file

i need to read the first word of each line of a text file.
i know of line.split() but not actually sure how i would go about using it
Any help most appreciated
Many Thanks
Ben

Hi thanks for the reply!
this is what i tried... and it still doesn't get me the first word of each line!
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.io.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.swing.text.*;
import javax.swing.event.*;
import java.util.Calendar;
import java.util.Scanner;
import java.util.Vector;
import java.text.SimpleDateFormat;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.io.BufferedReader;
public class testing {
     Vector progs=new Vector();
     Vector rand=new Vector();
     String[] tmp = new String [2];
     String str;
     String str2="ewerwer";
     String str3;
     public void programTest()
               try
                         BufferedReader in = new BufferedReader(new FileReader("progList.log"));
                         while ((str = in.readLine()) != null)
                              progs.add(str);
                    catch(IOException e)
                         System.out.println("cannot read file");
     //////THE ISSUES IS HERE....I WANT TO GET THE FIRST WORD FROM EACH LINE OF THE FILE!!!
          try
                         BufferedReader in2 = new BufferedReader(new FileReader("eventLog.log"));
                         while ((str = in2.readLine()) != null)
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Select first word in each line of a text file to do something.

How do I select the first word in each line to do something newer from a text file in Powershell?
Example:
GBL Primary File
local Primary File
localhost Primary File
Opstest Primary File
TrustAnchors Primary File
99upgrade

Hi 99,
here's an example on how to do it:
$lines = Get-Content "C:\ExampleFolder\Example.txt"
foreach ($line in $lines)
Write-Host ($line.Split(" "))[0]
Just replace the Write-Host line in the loop with what you actually want to do with the first word in the line.
Cheers,
Fred
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Java write/append to each line of a text file

I have spent numerous hours trying to figure out what I am doing wrong. If anyone more experienced could tell me what is wrong with my code.
I have a very simple text file with 5 lines:
line1
line2
line3
line4
line5
All I am trying to do is append some string to the end of each of those lines. Everytime I run my code, it erases all content but does not write/append anything to the file. Any help is greatly appreciated.
Thanks! I am about to throw this monitor out the window!!
package Chapter6;
import java.io.*;
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          System.out.println(dir.isDirectory());
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First, thanks a lot for your feedback. The code makes a lot of sense but it does not update the content of my Test.txt file.
I only edited the line of code that creates the new file so that it could find the location of the file.
Scanner file = new Scanner(new File("C:\\testing",fileName));==============================
The code now looks like:
import java.io.*;
import java.util.*;
public class Main {
    static void appendTo(String fileName, String[] newLines) throws IOException {
        List<String> allLines = getLinesFrom(fileName);
        for(String line : newLines) {
            allLines.add(line);
        writeLinesTo(fileName, allLines);
    static List<String> getLinesFrom(String fileName) throws IOException {
        List<String> lines = new ArrayList<String>();
        Scanner file = new Scanner(new File("C:\\testing",fileName));
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            out.write(System.getProperty("line.separator"));
        out.close();
    public static void main(String[] args) {
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        String[] extraLines = {
                "a new line",
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        try {
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        } catch (IOException e) {
            e.printStackTrace();
}Again, thanks for the help.

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.*;
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          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");
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     private javax.swing.Timer timer;
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     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,
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     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));
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               distributePositions();
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               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);
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               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

How to finds specific words in each sentence?

import java.io.*;
import java.text.*;
import java.util.*;
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myfile.txt: "Go fishing every Tuesday and every Wednesday"
There is big problem with split statement because it takes each word not more than a word.
I need to have "every Tuesday" not "Tuesday". How to make it correct codes?

I am going to give you a picture of how the output will look.
Here are two sentences from myfile.txt:
Go fishing every Tuesday and every Wednesday
Meet with research students on Thursday
I need to read from myfile.txt and to find specific words in each sentences like this output:
Every Tuesday : Go fishing
Every Wednesday : Go fishing
Thursday : Meet with research students
Ok. make sense? Now I am trying to figure out how to find specific words in each sentence from myfile.txt.
That is why I have difficult with the splits statement and loops. Like this:
     public static String findTheIndex(String sentence){
          String result = "";
          String[] s = sentence.split("\\s");
          for (String s1: s){
               for (String s2: days){
                    if (s1.equalsIgnoreCase(s2)) {
                         if(s2.matches("every Tuesday")){
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                         }else if(s2.matches("Thursday")){
                         }else{
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}So look at the "Thursday" it is working the output because I have split statement to give me only one word not more than
a word in sentence. So there is big problem with more than a word in sentence like this "every Tuesday" and it won't work at all because of split. Could you please help me how to do that? I appreciated for that help. Thanks.

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The Java� Tutorials > Essential Classes: Basic I/O

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I want to read one word at a time from a text file as it is done by "scanf &s" function in text based programme. It is not possible by " read from text" function. Suggest me function or method to solve this.

The simplest way is to use the spreadsheet string to array function with the space character as the delimiter.
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Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
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Hendawy wrote:
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          help.add(new JSeparator());
          nver = new JMenuItem("new Versions");
          nver.addActionListener(this);
          help.add(nver);
          note = new JTextArea("");
          try {
               BufferedReader filein = new BufferedReader(new FileReader("files.txt"));
               String sfile;
               while ((sfile = filein.readLine()) != null) {
                    //add buttons per each line of the txt file and show em
          catch (FileNotFoundException ioe) {
               JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);
          catch (IOException ioe) {
               JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);
          String[][] data = new String[dat.size()][];
          for (int x = 0; x < dat.size(); x++) {
               data[x] = (String[])dat.get(x);
          filetable = new JTable(data, columnNames);
          filetable.setPreferredScrollableViewportSize(new Dimension(100, 500));
          JScrollPane scrollpane = new JScrollPane(filetable);
          name = new JTextField("diary");
          JPanel main = new JPanel(new GridLayout(0, 1));
          getContentPane().add(note);
          getContentPane().add(name, BorderLayout.SOUTH);
          getContentPane().add(scrollpane, BorderLayout.WEST);
          setJMenuBar(menu);
     public void actionPerformed(ActionEvent e) {
          if (e.getSource() == nu) {
               int nuask = JOptionPane.showConfirmDialog(Diary.this, "Are you sure you want to make a new entry?\nThis will erease any unsaved entry's!!");
               if (nuask == JOptionPane.YES_OPTION) {
                    note.setText("");
                    note.setBackground(Color.WHITE);
                    note.setForeground(Color.BLACK);
          if (e.getSource() == copy) {
               note.copy();
          if (e.getSource() == paste) {
               note.paste();
          if (e.getSource() == save) {
               try {
                    String sn = name.getText();
                FileWriter outputStream = new FileWriter("saved/" + sn + ".txt");
                setTitle("Diary 1.00 : " + sn);
                outputStream.write(note.getText());
                outputStream.close();
            catch(IOException ioe) {
                 System.out.println("IOException");
          if (e.getSource() == exit) {
               int exitask = JOptionPane.showConfirmDialog(Diary.this, "Are you sure you want to exit? Any unsaved entries will be deleted");
               if (exitask == JOptionPane.YES_OPTION) {
                    System.exit(0);
          if (e.getSource() == b8) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),8));
          if (e.getSource() == b10) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),10));
          if (e.getSource() == b12) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),12));
          if (e.getSource() == b14) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),14));
          if (e.getSource() == b18) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),18));
          if (e.getSource() == b20) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),20));
          if (e.getSource() == b24) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),24));
          if (e.getSource() == b30) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),30));
          if (e.getSource() == bblue) {
               note.setBackground(Color.BLUE);
          if (e.getSource() == bred) {
               note.setBackground(Color.RED);
          if (e.getSource() == bgreen) {
               note.setBackground(Color.GREEN);
          if (e.getSource() == bpink) {
               note.setBackground(Color.PINK);
          if (e.getSource() == cblue) {
               note.setForeground(Color.BLUE);
          if (e.getSource() == cred) {
               note.setForeground(Color.RED);
          if (e.getSource() == cgreen) {
               note.setForeground(Color.GREEN);
          if (e.getSource() == cpink) {
               note.setForeground(Color.PINK);
          if (e.getSource() == eset) {
               new UserSettings().setVisible(true);
          if (e.getSource() == about) {
               JOptionPane.showMessageDialog(null, "Created by Collin Doering 2005 in Gr.9\n\nErrors:\n------------------------------------------------------------------\n1. No File Encryption\n2. No user and password Encryption", "", JOptionPane.INFORMATION_MESSAGE );
          if (e.getSource() == nver) {
               JOptionPane.showMessageDialog(null, "New Version |3.00| expected July, 2005\n\nNew Features\n----------------------------------------------\n1. File Encryption\n2. User File Encryption\n3. Full help dialog\n4. More Text changing features", "", JOptionPane.INFORMATION_MESSAGE);
          if (e.getSource() == using) {
               JOptionPane.showMessageDialog(null, "Go ask Collin Doering\[email protected]", "", JOptionPane.INFORMATION_MESSAGE );
THANK YOU

so i still do not understand how i would create one
button per each line in a txt flle then read in the
file that the txt file specified.This assumes you know how many lines there are in the file.
If not, modify as per my prior post
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
String[] linesInFile = {"Hello","World","Goodbye","Now"};
JButton[] btn = new JButton[linesInFile.length];
public Testing()
    setLocation(200,200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(0,1));
    for(int x = 0; x < btn.length; x++)
      btn[x] = new JButton(linesInFile[x]);//<---this would be where file.readLine() goes
      jp.add(btn[x]);
      btn[x].addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent ae){
          JOptionPane.showMessageDialog(getContentPane(),ae.getActionCommand());}});
    getContentPane().add(jp);
    pack();
public static void main(String[] args){new Testing().setVisible(true);}
}

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+=""+' ';
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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

How do i read complete line from a text file in j2me?????

how do i read complete line from a text file in j2me????? I wanna read file line by line not char by char..Even i tried with readUTF of datainputstream to read word by word but i got UTFDataFormatException.. Please solve my problem.. Thanks in advance..

That is not my problem . i already read it char by char.. i am getting complete line..But this process is taking to much time..So thats why i directly wanna read complete line or word to save time..

Read specified line from a text file

Hi,
I am trying to read a specific line from a text file. I don't want to read all of it but just this specific line... say line number 2. Is there a method built-in in java or should I code this myself?
Thanks and regards,
Krt_Malta

Krt_malta wrote:
I am trying to read a specific line from a text file. I don't want to read all of it but just this specific line... say line number 2. Is there a method built-in in java or should I code this myself?Is there anything in your use case that precludes using the offset of the start of the line rather than the line number?

Program to read only specific words in each Line in a text file

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