import java.io$.$File;

import java.io$.$IOException;

import java.util.ArrayList;

import java.util.Scanner;

public class Arithmetic

$\{$

$/**$

This class reads a file containing arithmetic expressions and returns an

array list of the results.

@param filename the file name

@return a list of results

$*/$

public static ArrayList read$($String filename$)$ throws IOException

$\{$

$/*$ Your code goes here $*/$

$\}$

$//$ This method checks your work.

public static String check$($String filename$)$

$\{$

try

$\{$

return read$($filename$).$toString$()$;

$\}$

catch $($IOException ex$)$

$\{$

return $"$I$/$O exception thrown";

$\}$

catch $($Exception ex$)$

$\{$

return ex$.$getClass$().$getName$()$;

$\}$

$\}$

public static void main$($String$[]$ args$)$ throws IOException

$\{$

Scanner console $=$ new Scanner$($System$.$in$)$;

String inputFileName $=$ console.nextLine$()$;

String result $=$ check$($inputFileName$)$;

System.out.println$($result$)$;

$\}$

$\}$