Not sure where to go from here...

javachallenged · #1 15-May-2008, 00:33

I'm trying to write a program that reads lines from a txt file, then prints them out with the number of the line it is in front and a colon afterwards as follows:
1 textFromLine1 :
2 textFromLine2 :
etc...

The program I wrote, however, calls the text lines up, but puts a one in front of each line, rather than numbering them. I thought I put the number part in right, but I'm confused. Any help?

JAVA Code:

import java.util.Scanner;	//Needed for Scanner class
import java.io.*;			//Needed for file and IOException

public class numberTextLines
{
   public static void main (String[ ] args) throws IOException
   {
     
      
  int number;		//Loop control variable
  
  //Create a Scanner object for keyboard input.
  Scanner keyboard = new Scanner(System.in);
  
  //Get the file name.
  System.out.print("Enter the name of a file.");
  String filename = keyboard.nextLine();
  
  //Open the file.
  File file = new File(filename);
  Scanner inputFile = new Scanner(file);
  
  //Read the lines from the file until no more are left.
  while (inputFile.hasNext())
  {
  	//Read the next line.
  	String line = inputFile.nextLine();
  	
  	for (number = 1; number <=1; number++)
  	{
  		//Display the lines with number and ":".
  		System.out.println(number + line + ":");
  	}
  		 	
  }
  
  
  //Close the file.
  inputFile.close();    

   }//end main method
}//end class

TurboPT · #2 15-May-2008, 04:34

'number' is always set to one by this:

JAVA Code:

for (number = 1; number <=1; number++)
 // every iteration, number is set to 1.
 // so with every line, number WILL BE 1.

So, I would suggest eliminating the 'for loop', use 'number' as a counter initialized with one where it's declared, then where the loop was, just use two statements:

JAVA Code:

//Display the lines with number and ":".
System.out.println(number + line + ":");
number++; // next line#

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Not sure where to go from here...

Re: Not sure where to go from here...