Word count in text file

Hi,
I am trying to count word in my text file by using the Java code. Even though i am error in the code and don't know what sintaks to use. For example:
I have
school 4
bus 3
student 5
in a.txt
Another text file
bus 2
school 2
in b.txt
I want to display in new text file: c.txt
school 6 4 : a.txt 2 : b.txt
bus 5 3 : a.txt 2 : b.txt
student 5 5 : a.txt
Could you please advise,what sintak that i could use??
Thanks you..

Use StringTokenizer object and HashMap Object
example
String str = (your text readed from file A)
StringTokinzed token = new StringTokinzed(str);
while (token.hasMoreTokens()) {
String word = token.nextToken()
Integer i = (Integer) hashmap.get(word);
if (i==null) {
i = new Integer(1);
}else
i++;
hashmap.put(word,i);
same code for B file
iterate through the hasmap and print all word with the count

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To get a word in the text file

Hi,
I m beginner to java.
HOw i get a word in the text file.
I used this code, it is only display the all sentence which are available in the text file.
But , I need to print particular word (if it is available in that text file)
package com.beryl;
import java.io.*;
class FileReadTest {
public static void main (String[] args) {
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f.readMyFile();
void readMyFile() {
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String record = null;
int recCount = 0;
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File f = new File("E:/hello/abc.txt");
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System.out.println("Uh oh, got an IOException error!" + e.getMessage());
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Thanks & Regards,
kumar

I used this code, it is only display the all
sentence which are available in the text file.
But , I need to print particular word (if it
is available in that text file)if
String.indexOf()

Reading words from a text file

I have written code to store words in a text file. they appear in the text file as shown below.
word1
word2
word3
etc.
I want to read each word individually and store them in an array. Im trying to do it using a BufferedReader but it doesn't seem to work. The code for reading the words is shown below. Any suggestions would be appreciated.
try
FileReader reader = new FileReader("words.txt");
BufferedReader bReader = new BufferedReader(reader);
ArrayList words = new ArrayList();
String line;
while((line = bReader.readLine()) != null)
line = bReader.readLine();
words.add(line);
bReader.close();
catch (Exception e)
System.err.println ("Error writing to file");
}

I think your code is wrong, because it Read two time from file,
your code like....
while((line = bReader.readLine()) != null)
line = bReader.readLine();
words.add(line);
you have to change the above code like
while((line = bReader.readLine()) != null)
words.add(line);
NOW ITS WORKING FINE,...........

Replace/cut part of words from a text file.

Hello Hello everyone, I have a quick question. I have my text file that contains also words like ... let's say abc1, abc2 and so on, and I need to cut the c from the word, I need ab1, ab2.
Here is what I have started:
import java.util.*;
import java.io.*;
public class test
        Vector<String> x = new Vector<String>();
public mergefiles() throws IOException
        readAdd("test.txt");
        write("testout.txt");
private void readAdd(String name) throws IOException
        BufferedReader reader = new BufferedReader(new FileReader(name));
        String line,all=new String();
        while ((line = reader.readLine ()) != null)
                all+=line+'\n';
        reader.close ();
        int posX=all.indexOf("X"); // x being like first word of the text file
          if (all.length()-posX>0)
               String between=all.substring(posX+3,all.length());
               StringTokenizer st=new StringTokenizer(between," \n");
private void write(String name) throws IOException
        BufferedWriter writer = new BufferedWriter(new FileWriter(name));
        String s=new String();
         if (x.size()>0)
              s+="X"+'\n';
         s+='\n';
         writer.write(s);
        writer.close();
public static void main(String[] args) throws IOException
        new test();
}I am new to Java and I would really appreciate if you would be patient with me.
Thank you!

I have tried in readAdd method something like:
int posX=all.indexOf("X"); // x being like first word of the text file
          if (all.length()-posX>0)
               string.replace("ab1","abc1");
          }     but still doesn't work, and this is not a really good ideea, in case that I have to replace 1000 of abci ...I should use a for in my write method:
String[] s=new String[2];
for(int i=0;i<word.length;i++)
               BufferedWriter writer = new BufferedWriter(new FileWriter(testout.substring(0, testout.lastIndexOf("."))+(i+1)+".txt"));
                   writer.write(s);
          writer.close();
But I not really sure if this is ok! Right now nothing is working
Thanks

Find words within a text file

Hey all.
I am playing around with the idea of finding a line of text within a text file, by using scanner and some next methods.
The way I am trying to get it to work is that one enters a string and the program then finds all the lines of text containing that
user-entered string and then prints them.
The text file in question contains names of University papers and their room numbers, quantity of students etc.
Example:
IBUS212     EALT006     1am     72     AL     LI
BMSC241     MCLT102     2     pm     8     AL     COOREY
My problem annoyingly enough seems to be that I can't think how one could compare the string entered to the lines of text being
scanned in the text file.
My latest go involved what you see in the code, scanning the examdata.txt file for a user-entered course number, using course.next();
by going with the example above it would be IBUS212. The task was to then to find all of the lines containing that number and print them out using
println (what I have tried with id and line) as well as the rest of that line eg: EALT006     1am     72     AL     LI .
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    try
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        int count;
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}Any advice/help/troubleshooting would be greatly appreciated.
Edited by: AUAN on Aug 13, 2009 9:43 AM
Edited by: AUAN on Aug 13, 2009 9:44 AM
Edited by: AUAN on Aug 13, 2009 9:49 AM

You'll want [to loop while|http://java.sun.com/docs/books/tutorial/java/nutsandbolts/while.html] the course Scanner has a next line and then print the line if it contains the entered text.
For useful methods you can check the Javadoc of String and Scanner (use your browser search on keywords like 'next' or 'contains' to find them).

Help!!! - Line Count in Text file

I need to write a program for an assignment due next week. I should read between 30 and 70 lines of text from a text file. Each line contains an integral number of words. The program is required to display all the words on each line in revers order: "pass before they can enter" to read "enter can they before pass". I can reverse the words but the issue of 30 - 70 lines is a problem. I have the following code. What I'm I doing wrong???
import java.io.*;
import java.util.*;
import java.util.StringTokenizer;
public class LineReaderVector{
public static void main(String args[])throws IOException{
BufferedReader in=new BufferedReader(new FileReader("inpfile.txt"));
LineNumberReader read=new LineNumberReader(new FileReader ("inpfile.txt"));
String thisLine;
int line=0;
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To read a file line by line this should do:
try
BufferedReader br = new BufferedReader(new FileReader("inpfile.txt"));
String s = br.readLine();
while (s != null)
    System.out.println(s);
    s = br.readLine();
br.close();
catch (IOException ex)
ex.printStackTrace();
...

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i want to read in a text file and when i come across a certain word, i want to change it to something else. Whats the best way to do this ?
If i read in a line at a time, how would i only replace one word and not the rest of the line ?
thanks

thanks it works !!! But i wrote the contents to a new file.
How do i overwrite the same file ? I put the the input and output file as the same location but it overwrites the original file with a blank one.
i guess i have to write into another buffer and read all lines first before overwriting the file right ? how should i do that ?
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Yesterday i update Yosemite and Adobe Photoshop CS6
i found error text message like you everytime when i used fontAwesome on Adobe Photoshop CS6 and then i found out to fix this problems Yeahh…
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Read words from a text file into an undefined array

Dear all,
Does anyone know how to read words in text file, seperated by all types of spaces ("_", "\n", "\t","\r","\f") and put them into a string array to be used later?
So far I can read the words using the Tokenizer but can't assign to array:
public class reader
StringTokenizer tokenizer = new StringTokenizer(input);
String[ ] array= null; //unknown size of array
int i=0;
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Any suggestions welcome!
thanks in advance!

Hi
sorry wrote in a hurry ;) din c the problem clearly
there are two approaches
1) best approach for your problem is Vector or ArrayList, these would make life easy for you.
Always collections are better approach over arrays when the size is dynamic. However in your case the size cant be said to be DYNAMIC. coz the number of words will not grow / shrink during the runtime.. i know that number of words are not fixed but dynamic is something which will grow/shrink during runtime. but still collection is better approach.
2)dirty approach
use double dimensional array
String arr[][] = null;
then use one tokenizer for StringTokenizer(str,"\n");
using countTokens on this will give you number of lines.
use this to initialize array
arr = new String[lineCount][];
then iterate from 1 to lineCount and use 1 more tokenizer to get number of words for that line. use this number to initialize the column size for arr[i] like
arr[i] = new String[wordCount];
then store the token using nested for loops in this array
go for the 1st one ;) 2nd one is hedious n time consuming but both will work ;)
cheers
amey

Putting words from a text file into a binary tree.

I am having problems figuring out how to do this.
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Every one likes to play games.
My Dog tore up my apartment last night.
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JulianJ wrote:
That will work?I'm sorry to tell you, that is a really bad question. Of course it won't work, because you did something else wrong. I have no idea what, but it's pretty certain that you haven't got everything right yet. (And that's nothing personal, it's just an observation about computer programming in general.) But don't let that stop you. And don't wait around for people to validate your ideas. Try it and see what happens. You won't break anything. And when it doesn't work, figure out why and carry on.

Replacing word in a text file...in java

hello;
could anyone plz help me in writing a program in java that will replace a specific word with a specific word?Though i can read and write to a file. I need it urgently....plz help me...
regards
[email protected]

public class wordReplace {
public static void main(String [] args)
String oldStr = "They can do it easily..." ;
String newStr = oldStr.replaceAll("They", "You");
System.out.println(newStr);
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Hi...There..
I h'va wrirtten Search application which search words from Simple text files.
My file contains list of words separated by "\n"(new line).
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It should work, however I gave it less than five minutes testing.

Word count in text file

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