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

/** Reading with a Scanner 

    This version uses the try/catch block
    
    @author P. Conrad (adapted it for CS56 and added comments)
    @see also <a href="http://www.javapractices.com/topic/TopicAction.do?Id=42">http://www.javapractices.com/topic/TopicAction.do?Id=42</a>
    

 */

public class ReadFromFile4 {
    
    public static void main(String [] args) throws FileNotFoundException {
        
        if (args.length != 1) {
            System.err.println("Usage: java ReadFromFile4 filename");
            System.exit(1);
        }
        
        int lineNumber = 0;
        
        Scanner scanner = null;

        try {
            // The next line is typical of stuff you'll see in Java.
            // Each nested constructor adds some "layer"---and
            // each thing inside represents one of several "choices".
            
            scanner = new Scanner(new FileReader(new File(args[0])));
	    
            
            // Use a Scanner to get each line
            
            while ( scanner.hasNextLine() ){
                String thisLine = scanner.nextLine();
                lineNumber ++;
                System.out.printf("[%04d] %s\n",lineNumber,thisLine);
            }
            
	    //        } catch (FileNotFoundException fnfe) {
	} catch (IllegalArgumentException iae) {
            System.out.println("Ooops, I was unable to find the file " + args[0]);
            // e.printStackTrace();
	    // return;
        }
        finally {
	    System.out.println("Inside the finally block");
            if (scanner!=null) {scanner.close();}
        } // try/catch/finally
        
	System.out.println("Outside the entire try/catch/finally");

    } // main
    
}