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

/** Add line numbers to a file

    @author P. Conrad based on code from link below
    @see ReadWithScanner
    @see <a href="http://www.javapractices.com/topic/TopicAction.do?Id=42">http://www.javapractices.com/topic/TopicAction.do?Id=42</a>
    

 */

public class AddLineNumbers extends ReadWithScanner {
    
    private int lineNumber = 0;

    /**
       @param args first arg is filename; rest unused
     */

    public static void main(String [] args) throws FileNotFoundException {
	AddLineNumbers aln = new AddLineNumbers(args[0]);
	aln.processLineByLine();
    }
  
    /** 
	Constructor.
	@param aFileName full name of an existing, readable file.
    */
    public AddLineNumbers(String aFileName){
	super(aFileName);
    }
  
  
    /** 
	print the line on System.out with a line number in front
   
    */
    
    protected void processLine(String aLine){
	this.lineNumber ++;
	System.out.println(lineNumber + aLine);
    }

}