Assignemnt #103 and 103rd program

Code

///Name: Derrick Andreasen
///Period: 7
///Program name: 103rd Program
///File name: Hund2prog.java
///Date Finished:3/30/2016

import java.util.Scanner;

public class Hund3prog
{
	public static void main( String[] args )
	{
    Scanner keyboard = new Scanner( System.in );
        int choice, keychain = 0, keyPrice = 10, add, subtract, keychainsInOrder = 0;
        double salesTax = 1.0825, shipping = 5 + (keychainsInOrder - 1);
        
        System.out.println( "Ye old Keychain shoppe" );
        System.out.println();
        
        do
        {
            System.out.println( "1. Add keychains to order\n2. Remove Keychains from Order\n3. View current Order\n4. checkout" );
            System.out.print( "Please enter your choice: " );
            choice = keyboard. nextInt();
            System.out.println();
            
            if(choice == 1)
            {
                keychainsInOrder = addKeychains(keychainsInOrder);
                System.out.println( "You now have " + keychainsInOrder + " keychains." );
            }
            else if(choice == 2)
            {
                keychainsInOrder = removeKeychains(keychainsInOrder);
                System.out.println( "You now have " + keychainsInOrder + " keychains." );
            }
            else if(choice == 3)
            {
                viewOrder(keychainsInOrder, keyPrice, salesTax, shipping);
            }
            else if(choice == 4)
            {
                checkout(keychainsInOrder, keyPrice, salesTax, shipping);
            }
            else
            {
                System.out.println( "That's not a valid choice." );
            }
        }while (choice != 4);
    }
    
    public static int addKeychains(int keychain)
    {
        Scanner keyboard = new Scanner( System.in );
        String x = "ADD KEYCHAINS";
        int add;
        
        System.out.print( "You have " + keychain + " keychains. How many to add? " );
        add = keyboard.nextInt();
        
        keychain = keychain + add;
        if (keychain < 0)
        keychain = 0;
        return keychain;
    }
    
    public static int removeKeychains(int keychain)
    {
        Scanner keyboard = new Scanner( System.in );
        String x = "REMOVE KEYCHAINS";
        
        System.out.print( "You have " + keychain + " keychains. How many to remove? " );
        int subtract = keyboard.nextInt();
        
        keychain= keychain - subtract;
        if(keychain < 0)
        keychain = 0;
        return keychain;
    }
    
     public static void viewOrder(int keychain, int keyPrice, double salesTax, double shipping)
    {
        String x = "VIEW ORDER" , message;
        
        System.out.println( "You have " + keychain + " keychain.\n Keychains cost $10 each. \nTotal cost is " + ( keyPrice * keychain ));
    }
    
     public static void checkout(int keychain, int keyPrice, double salesTax, double shipping)
    {
        Scanner keyboard = new Scanner( System.in );
        String x = "CHECKOUT" , check, name;
        
        System.out.print( "What is your name? " );
        name = keyboard.next();
        
       viewOrder(keychain, keyPrice, salesTax, shipping);
       System.out.println( "\nThanks for your order, " + name + "!"  );
    }
}
    

Picture of the output