Question

IN JAVA.

Write a program that reads a file (provided as attachment to this assignment) and writes the file to a different file with line numbers inserted at the beginning of each line.

For example if file input is:

This is a test

File output should be

1. This is a test

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

BELOW FROM NOTEPAD FILE.

This file contains
lines of text to
determine if you can
properly read and
write from a file.

Answer 1

Program

import java.util.*;
import java.io.*;

//class
class ReadWriteFile
{
   //main method
   public static void main(String[] args) throws IOException
   {
       File file = new File("input.txt");
      
       Scanner in = new Scanner(file);
      
       FileWriter fw = new FileWriter("output.txt");
  
PrintWriter out = new PrintWriter(fw);
          
       int i = 1;
      
       while(in.hasNext())
       {
           //read a line from file
           String line = in.nextLine();
          
           //write to console  
           System.out.println(line);
      
           //write to file
           out.printf("%d. %s\n", i, line);
          
           i++;
       }
       //close FileWriter
       fw.close();
      
   }
}

input.txt

This file contains
lines of text to
determine if you can
properly read and
write from a file.

output.txt

1. This file contains
2. lines of text to
3. determine if you can
4. properly read and
5. write from a file.