FIleNotFoundException - illegal start of expression - NetBeans

Question

I get the following error message 'llegal start of expression' at line

throws FileNotFoundException

I have done some research but wasn't able to fix it. Can you help? Many thanks, zan

import java.io.FileNotFoundException;
    import java.io.File;
    import java.util.Scanner;
    import static java.lang.System.out;

    public class training{
        public static void main(String[]args){

            throws FileNotFoundException{

            Scanner diskScanner = new Scanner(new File("occupancy"));

            out.println("Room\tGuests");

            for(int roomNum = 0; roomNum < 10; roomNum ++){
                out.print(roomNum);
                out.print("\t");
                out.println(diskScanner.nextInt());
                }
            }
        }
    }

What are you trying to do? Declare that main can throw that exception? Or are you looking for a try-catch syntax? — Corbin, Oct 08 '11 at 11:17

score 3 · Answer 1 · answered Oct 08 '11 at 11:18

3

You shouldn't have a curly brace before the throws keyword :

public static void main(String[]args) throws FileNotFoundException {
                                     ^-- no curly brace

Note that a class should always start with an uppercase letter.

answered Oct 08 '11 at 11:18

JB Nizet

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KV Prajapati · Answer 2 · 2012-01-20T03:24:16.297

2

Improper use of throws.

public static void main(String[]args) throws FileNotFoundException
{
 ..
}

It is better to use try..catch

public static void main(String[]args) 
    {
      try
       {
        ..
       }catch(FileNotFoundException ex)
        {
          //
        }
    }

edited Jan 20 '12 at 03:24

answered Oct 08 '11 at 11:23

KV Prajapati

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The code with the try/catch block does basically the same thing, except it's longer, and exits with 0 (success) rather than 1 (error). I would argue that the code with the throws clause is better. – JB Nizet Oct 08 '11 at 11:30
@JBNizet Agree with current code snippet but what happen when method contain other statements? In OP post, he/she has to handle **NoSuchElementException** too. – KV Prajapati Oct 08 '11 at 11:39
He could also add this exception to the throws clause. There is no need to catch an exception if it's just to print its stack trace and exit. – JB Nizet Oct 08 '11 at 11:41
1

Please, *please*, do not call `printStackTrace` and continue as if nothing happened: http://stackoverflow.com/q/7469316/238421, http://onjava.com/onjava/2003/11/19/exceptions.html – Danilo Piazzalunga Jan 19 '12 at 21:47

score -1 · Answer 3 · answered Oct 08 '11 at 11:17

-1

Your syntax is wrong. Check your source and/or the language specification.

answered Oct 08 '11 at 11:17

user207421

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FIleNotFoundException - illegal start of expression - NetBeans

3 Answers3