/**
 * FileInputDemo opens a file specified as a command-line
 * argument, reads the file line by line, and prints an
 * upper-case version of the file to standard output.
 *
 * @author Dave Musicant
 */

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

public class FileInputDemo
{

    public static void main(String[] args) {

        // It's good to tell people when they are invoking the program
        // incorrectly.
        if(args.length != 1) {
            System.out.println( "Usage: java FileInputDemo someFileName" );
            System.exit(1);
        }

        // You need to declare and initialize the Scanner out here
        // so it will still be in scope after the try/catch blocks.
        Scanner in = null;
        try 
        {
            in = new Scanner(new File(args[0]));
        }
        catch(FileNotFoundException e)
        {
            System.out.println( "Can't find the file " + args[0] + "." );
            System.exit(1);
        }

        // As long as there is to be something new to be read from
        // the file, read a line, convert to upper case, then
        // print.
        while (in.hasNext())
        {
            String line = in.nextLine();
            System.out.println(line.toUpperCase());
        }

        in.close();
    }
}