Question

Write a program in JAVA, Scenario: School Cafe is offering a new buffet style dining (“make-believe”). It intends to open the Café to the students as well as to their families. There is a need for the dining cafeterias to have a program for the servers to print out the bill or check for each party. The three campuses (Ess, Caton, and Dun) dining halls will use this program. Write a program in JAVA that allows each campus cafe to enter its location at the start of the day and will keep tally of number of tables or bills for the day. Server will be allow to enter the number of adults and number of children at each table and a bill will be printed out showing the cost of the meal for the table. At the start of the program, order number or check number starts at 100 and will increment each time a new order is printed out. The order number cannot be repeated or re-used. If server made an error and the order number needs to be cancelled, the manager must be notified and a void will be manually written on that order and noted void. Requirements: Three Java classes: CalcBill, Bill, Café

Answer 1

Folder Structure :

code/Cafe.java

code/Bill.java

code/CalBill.java

Cafe.java

package code;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

enum Location {
   ESS, CATON, DUN;
}

public class Cafe {
   private Location location;
   private static double totalBill;
   private static int billNumber = 100;
   private List<Bill> billList;
   private double adultPrice;
   private double childrenPrice;

   public Cafe(Location location, double adultPrice, double childrenPrice) {
       this.location = location;
       this.adultPrice = adultPrice;
       this.childrenPrice = childrenPrice;
       billList = new ArrayList<Bill>();
       System.out.println("The Cafe (" + location + ") billing is starting. Previous total Bill is " + totalBill);
   }

   public Location getLocation() {
       return location;
   }

   public double getTotalBill() {
       return totalBill;
   }

   public void setTotalBill(double totalBill) {
       Cafe.totalBill = totalBill;
   }

   public List<Bill> getBillList() {
       return billList;
   }

   public void addBill(Bill newBill) {
       billList.add(newBill);
       totalBill += newBill.getAmount();
   }

   public void displayBills() {
       Iterator<Bill> iterator = billList.iterator();
       while (iterator.hasNext()) {
           iterator.next().displayBill();
       }
   }

   public static int getBillNumber() {
       return billNumber++;
   }

   public void deleteBill(int billNumber) {
       Iterator<Bill> iterator = billList.iterator();
       Bill temp = null;
       while (iterator.hasNext()) {
           temp = iterator.next();
           if (temp.getBillNumber() == billNumber)
               break;
       }
       if (temp != null) {
           billList.remove(temp);
           totalBill -= temp.getAmount();
       } else
           System.out.println("Invalid Bill !!!");
   }

   public double getAdultPrice() {
       return adultPrice;
   }

   public double getChildrenPrice() {
       return childrenPrice;
   }

}

Bill.java

package code;

public class Bill {
   private int billNumber;
   private int adults;
   private int children;
   private double amount;

   public Bill(int billNumber, int adults, double adultPrice, int children, double childrenPrice) {
       this.billNumber = billNumber;
       this.adults = adults;
       this.children = children;
       this.amount = adults * adultPrice + children * childrenPrice;
   }

   public double getAmount() {
       return amount;
   }

   public int getBillNumber() {
       return billNumber;
   }

   public void displayBill() {
       System.out.println("Bill No. " + billNumber);
       System.out.println("************");
       System.out.println("Adults :\t" + adults);
       System.out.println("Children :\t" + children);
       System.out.println("***********************");
       System.out.println("Total Amount :\t" + amount);
   }
}

CalcBill.java

package code;

import java.util.Scanner;

public class CalcBill {
   public static void main(String args[]) {
       boolean flag = true;
       Location location = Location.ESS;
       Scanner scanner = new Scanner(System.in);
       System.out.println("Good Morning !!!");
       System.out.println("Please Enter your Location :");
       System.out.println("ESS(1), CATON(2), DUN(3)");
       switch (scanner.nextInt()) {
       case 1:
           location = Location.ESS;
           break;
       case 2:
           location = Location.CATON;
           break;
       case 3:
           location = Location.DUN;
       }
       System.out.println("\nEnter per buffet price for adult :");
       double adultPrice = scanner.nextDouble();
       System.out.println("\nEnter per buffet price for children :");
       double childrenPrice = scanner.nextDouble();
       Cafe cafe = new Cafe(location, adultPrice, childrenPrice);
       while (flag) {
           System.out.println(
                   "\nEnter New Bill -> 1\nDelete Previous Bill -> 2\nPrint Today's Total Bill -> 3\nPrint All Bills -> 4\nClose today's account -> 5");
           switch (scanner.nextInt()) {
           case 1:
               int adult, children;
               System.out.println("Enter Number of Adults :");
               adult = scanner.nextInt();
               System.out.println("Enter Number of Children :");
               children = scanner.nextInt();
               Bill bill = new Bill(Cafe.getBillNumber(), adult, adultPrice, children, childrenPrice);
               cafe.addBill(bill);
               break;
           case 2:
               System.out.println("\nEnter The Bill Number to make void");
               cafe.deleteBill(scanner.nextInt());
               break;

           case 3:
               System.out.println("\nTotal Bill : " + cafe.getTotalBill());
               break;
           case 4:
               cafe.displayBills();
               break;
           default:
               flag = false;
           }
       }
       scanner.close();
   }
}