Must Do: Placing all code in one file

$$ Please place all classes into one Java file.

$$ I request this to make my life easier when helping students and to make the grader$$s life easier.

$$ In industry the practice is to place each class into its own file, but here we will use only one file.

$$ To place all code into one file, the layout should be as follows:

public class Assignment$2\{$

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

$//$ Code to read file and create skies and place into array

$\}//$main

$\}//$ Assignment$2$ Note this is the end of your assignment $2$

New classes go AFTER this point

New classes do not include public keyword

class Ski $\{$

$//$ Details for the ski class go here

$\}//$ Ski

class CrossCountry extends Ski $\{$

$//$ Details for the cross country ski class go here

$\}//$ CrossCountry

$//$ Add remaining classes here

Tip: Build the classes first

$$ Before writing the code in main, build as many of the details in the classes as possible.

$$ Create at least a skeleton of each class before writing the code in main to create the skis.

$$ If you don$$t yet know what code belongs in a method, stub the method out $($i$.$e$.,$ write an empty

method$).$ If a return value is expected, return a temporary value to keep code error free.

Tip: Reading from files

$$ When reading from a file, use the methods in the Scanner class to obtain the different pieces of

data in the file.

$$ DO NOT read one entire line and then parse the line to get the different values.

o This means do not use Integer.parseInt$()$ method

$$ Use the Scanner methods $($next$(),$ nextDouble$(),$ nextInt$(),$ etc.$)$ to do the parsing for you.

$$ If you need a review of the Scanner methods next and nextLine, see Lecture #$3($String Review$).$