Thread: Parsing a text file in java

• Create a console application that reads text from a text file taken as a command line parameter and outputs the frequency (count) of the words that occur in the text file
o For example, the command will be run as “java FreqCounter input.txt”, and the output should be of the form: <word>,count

I tried it with the following code but the output comes as the first word of the text file and the count as 0. It repeats the same output for the complete file.

The code is as follows:

import java.io.*;
class FreqCounter 
{
//Code only reads a file
   public static void main(String args[])
  {
      try{
    // Open the file that is the first 
    // command line parameter
    String nameOfFile = args[0]; 
    String sample="";
    String tokens[] = new String[1000];
    int count;
 
 
    FileInputStream fstream = new FileInputStream(nameOfFile);
    // Get the object of DataInputStream
    DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String strLine;
    //Read File Line By Line
    while ((strLine = br.readLine()) != null)   {
        sample=""+strLine;
 
 
    }
 
       tokens = sample.split(" ");
 
    for (int i=0;i<=tokens.length;i++)
    {
        count=0;
        for(int j=i+1;j<=tokens.length;j++)
        {
          if (tokens[i]==tokens[j])
          {
              count++;
        }
        System.out.println("Word: "+tokens[i]+","+count);
        }
 
    //Close the input stream
    in.close();
    }
}
 
catch (Exception e){//Catch exception if any
      System.err.println("Error: " + e.getMessage());
    }
  }
}

Edit: Think I missunderstood the question here, gonna work a bit on it later and work it out. Hope you manage to solve it but if not I'll be trying it in netbeans.

Edit2: And very unmotivating to stumble across this on the net btw

import java.io.*;
class FileRead 
{
   public static void main(String args[])
  {
      try{
    // Open the file that is the first 
    // command line parameter
    FileInputStream fstream = new FileInputStream("textfile.txt");
    // Get the object of DataInputStream
    DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String strLine;
    //Read File Line By Line
    while ((strLine = br.readLine()) != null)   {
      // Print the content on the console
      System.out.println (strLine);
    }
    //Close the input stream
    in.close();
    }catch (Exception e){//Catch exception if any
      System.err.println("Error: " + e.getMessage());
    }
  }
}

At least try to make your own one? Otherwise your prof better not have access to google.

Glad you have solved your issue tccool. I have marked this thread as solved.

In future, you can do this yourself from the 'Thread Tools' menu near the top of the thread.

Originally Posted by maliv

CAN u post the code..

Boo hoo, that's not what a forum is for. Recommended reading:
How To Ask Questions The Smart Way

db

Originally Posted by maliv

CAN u post the code..i am trying to do exactly the same..parse..read and get some text data from txt filke

There are plenty of examples of this code here on the forums. Please try a Search or check out the 'Similar threads' section at the bottom this thread.

Also look at our code snippets forum:

Java Code Snippets and Tutorials - Java Programming Forums

There is code there for reading a file.

If you get stuck, please post a new thread and we will take it from there