Your task is to read a file containing arithmetic instructions such as

3 + 4 4 - 10 7 * 11 

Each instruction contains an integer, an operator (+, -, or *), and another integer.

Return an array list of the results. If there is any error, throw an IOException.

Complete the following file:

Arithmetic.java

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 { . . . } // This method checks your work. Do not touch it. 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(); } } }

(P.S. where the "..." is where I have to add new code can't change anything else"