JAVA Program Using Array of Objects

Running head: JAVA PROGRAM USING ARRAY OF OBJECTS
JAVA Program using array of objects
Name of the Student
Name of the University
Authors note

1JAVA PROGRAM USING ARRAY OF OBJECTS
Completed RockyCateringMenu.java
// TODO -- create header comments
import java.lang.reflect.Array;
import java.security.Key;
import java.time.Clock;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.InputMismatchException;
import java.util.Scanner;
import javax.swing.JOptionPane;
// TODO -- create the Booking class (separate file: Booking.java)
public class RockyCateringMenu
{
final int ENTER_BOOKING = 1;
final int DISPLAY_BOOKINGS = 2;
final int DISPLAY_STATISTICS = 3;
final int SEARCH_BOOKINGS = 4;
final int SORT_BOOKINGS = 5;
final int EXIT = 6;
double totvals;
//final int MAX_BOOKING = 10;
// TODO -- declare any further constants

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// TODO -- declare array of booking objects
Booking [] booking=new Booking[10];
int currentBooking;
Booking np=new Booking();
String nameMax = null;
String nameMin = null;
// TODO -- declare variable for the current booking entered (integer)
Scanner inputMenuChoice = new Scanner(System.in);
//private int MaxBooking=10;
private int getMenuItem()
{
System.out.println("\nPlease select from the following");
System.out.println(ENTER_BOOKING + ". Enter booking name and number of
guests");
System.out.println(DISPLAY_BOOKINGS + ". Display all booking names,
number of guests and charges");
System.out.println(DISPLAY_STATISTICS + ". Display Statistics");
System.out.println(SEARCH_BOOKINGS + ". Search for booking");
System.out.println(SORT_BOOKINGS + ". Sort the bookings");
System.out.println(EXIT + ". Exit the application");
System.out.print("Enter choice==> ");
String choice = inputMenuChoice.nextLine();
while (choice.equals("") || !isStringNumeric(choice))

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{
JOptionPane.showMessageDialog(null, "Error - Menu selection name
cannot be blank and must be numeric",
"Input Menu
Choice", JOptionPane.ERROR_MESSAGE);
System.out.print("Enter choice==> ");
choice = inputMenuChoice.nextLine();
}
return Integer.parseInt(choice);
}
private boolean isStringNumeric(String str)
{
for (int i = 0; i < str.length(); i++)
{
if (!Character.isDigit(str.charAt(i)))
return false;
}
return true;
}
private void processBookings()
{
int choice = getMenuItem();

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while (choice != EXIT)
{
switch (choice)
{
case ENTER_BOOKING:
enterBooking();
break;
case DISPLAY_BOOKINGS:
displayAllBookings();
break;
case DISPLAY_STATISTICS:
displayStatistics();
break;
case SEARCH_BOOKINGS:
searchBookings();
break;
case SORT_BOOKINGS:
sortBookings();
break;
default:
System.out.println("ERROR choice not recognised");
}
choice = getMenuItem();
}
}
private void enterBooking()
{

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displayHeading();
//String guestNum=0;
// TODO -- check if maximum bookings has been reached (do this after getting
the other functionality working)
int numBook = 0;
//=0;
Integer gnum = 0 ;
//= 0;
//while(currentBooking<10)
{
//String mv =/1
//JOptionPane.showInputDialog(null, "Enter Booking Name");
String mv=JOptionPane.showInputDialog(null, "Please Enter the booking name",
"Input Booking name", JOptionPane.PLAIN_MESSAGE);
if(mv.isEmpty())
{
JOptionPane.showMessageDialog(null, "Error - Booking Name Can not be
Blank","Input Booking name!", JOptionPane.ERROR_MESSAGE);
}
else
{
booking[currentBooking]=new Booking();
booking[currentBooking].setBookingName(mv);
}

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//h
try {
String guestNum = JOptionPane.showInputDialog(null,"Enter the number of
guests", "Input number of Guests", JOptionPane.PLAIN_MESSAGE);
gnum=Integer.parseInt(guestNum);
booking[currentBooking].setGuests(gnum);
} catch ( NumberFormatException e) {
JOptionPane.showMessageDialog(null, "Number of Guests can not be
Blank","Input number of Guests!", JOptionPane.ERROR_MESSAGE);
}
//JOptionPane.showInputDialog(null,"Please Enter the booking name");
// JOptionPane.showInputDialog(null, this,"Enter value ", EXIT);
//JOptionPane.showInputDialog("Input Booking Name", "Please Enetr the
Booking Name");
System.out.println(booking[numBook].bookingName);
//System.out.println(gnum);
//System.out.println(numBook);
currentBooking++;
System.out.println(currentBooking);
//System.out.println(numBook);
}

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}
private void displayHeading()
{
System.out.printf("%-30s%-17s%-6s\n", "Booking Name", "Guests", "Charge");
}
private void displayAllBookings()
{
if(booking.length!=0)
{
for(int r=0;r<booking.length && booking[r] != null;r++)
{
double vals=np.calculateCharge(booking[r].getGuests());
//System.out.println(booking.length);
System.out.printf("%-30s%-17s%-6s\n", booking[r].getBookingName().toString(),
booking[r].getGuests().toString(),vals);
totvals+=vals;
//System.out.println("%-30s%-17s%-6s\\n\", \"Booking
Name\", \"Guests\", \"Charge\");
//System.out.println(booking[r].getBookingName());
//System.out.println(booking[r].getGuests());
}

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//for(int y=0;y<booking.length;y++)
// TODO -- check if there has been a booking entered (do this after getting the other
functionality working)
// TODO -- display all of the entries entered so far (just display the current entries not
the whole array, use the current booking variable as the termination condition)
}
else
{
//System.out.println("no booking");
JOptionPane.showMessageDialog(null, "You Must Enter At least one Booking
","Display All Bookings", JOptionPane.ERROR_MESSAGE);
//System.out.println([y].bookingName);
//System.out.println(booking[y].guests);
}
}
private void displayStatistics()
{
//String nameMax=null;
//String nameMin=null;
System.out.println("Statistics for Rocky Catering Srevice");
int c=0;
int sumval=0;
for(int r=0;r<booking.length && booking[r] != null;r++)
{

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sumval+= booking[r].guests;
c++;
}
//int mx=
float avgval=sumval/c;
System.out.println("Average number of Guests \t"+avgval);
System.out.println("Total charges are $\t"+totvals);
int min = booking[0].getGuests(); // assume first elements as smallest number
int max = max = booking[0].getGuests();
for (int i = 1; i < booking.length && booking[i] != null; i++) // iterate for loop from
arrays 1st index (second element)
{
if (booking[i].getGuests() > max)
{
max = booking[i].getGuests();
nameMax=booking[i].getBookingName();
}
if (booking[i].getGuests() < min)
{
min = booking[i].getGuests();
nameMin=booking[i].getBookingName();
}
}
//System.out.println(max);
System.out.println(nameMax+" has the maximum number of "+max+ " guests");
System.out.println(nameMin+" has the minimum number of "+min+ " guests");

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}
private void searchBookings()
{
String searchName=null;
if(booking==null)
{
JOptionPane.showMessageDialog(null, searchName+" You Must Enter At least one
Booking ","Search Bookings", JOptionPane.ERROR_MESSAGE);
// searchName = JOptionPane.showInputDialog(null,"Please Enter the Booking
Name", "Input Booking Name", JOptionPane.PLAIN_MESSAGE);
}
else
{
//System.out.println("Error Occured");
searchName = JOptionPane.showInputDialog(null,"Please Enter the Booking Name",
"Search Bookings", JOptionPane.PLAIN_MESSAGE);
for(int r=0;r<booking.length && booking[r] != null;r++)
{
if(booking[r].getBookingName().equals(searchName))
{
//double vals=np.calculateCharge(booking[r].getGuests());
//System.out.println(booking.length);

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//System.out.printf("%-30s%-17s%-6s\n",
booking[r].getBookingName().toString(), booking[r].getGuests().toString(),vals);
// System.out.println("found");
System.out.println(" Record found");
double vals=np.calculateCharge(booking[r].getGuests());
System.out.println(booking.length);
System.out.printf("%-30s%-17s%-6s\n",
booking[r].getBookingName().toString(), booking[r].getGuests().toString(),vals);
}
else
{
JOptionPane.showMessageDialog(null, searchName+" Not found ","Search
Bookings", JOptionPane.ERROR_MESSAGE);
}
//sumval+= booking[r].guests;
// c++;
}
}//
}
private void sortBookings()
{
// booking[]
for(int r=0;r<booking.length && booking[r] != null;r++)
{
double vals=np.calculateCharge(booking[r].getGuests());
///////////Array.sort(booking[r].bookingName);

12JAVA PROGRAM USING ARRAY OF OBJECTS
System.out.println(booking.length);
System.out.printf("%-30s%-17s%-6s\n", booking[r].getBookingName().toString(),
booking[r].getGuests().toString(),vals);
// totvals+=vals;
//System.out.println("%-30s%-17s%-6s\\n\", \"Booking
Name\", \"Guests\", \"Charge\");
//System.out.println(booking[r].getBookingName());
//System.out.println(booking[r].getGuests());
}
JOptionPane.showMessageDialog(null, "You Must Enter At least Two Bookings to
sort","Sort Bookings", JOptionPane.ERROR_MESSAGE);
}
public static void main(String [] args)
{
RockyCateringMenu app = new RockyCateringMenu();
System.out.println("Welcome to the Rocky Catering Service Management System");
app.processBookings();
System.out.println(" Thank you for Using Rocky Catering Service Management
System");
System.out.println("Program is written by [Student_ID]");

13JAVA PROGRAM USING ARRAY OF OBJECTS
}
}
Completed Booking.java
public class Booking {
public Booking(String bookingName, Integer guests) {
this.bookingName = bookingName;
this.guests = guests;
}
Booking() {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of
generated methods, choose Tools | Templates.
}
public String getBookingName() {
return bookingName;
}
public void setBookingName(String bookingName) {
this.bookingName = bookingName;
}
public Integer getGuests() {
return guests;
}
public void setGuests(Integer guests) {

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this.guests = guests;
}
public Double calculateCharge(int vale)
{
double charges=0;
if(vale<=20 )
{
charges=vale*29.50;
//charges=(1080+((vale-40)*19.50));
}
else if (vale<=40) {
charges=(590+((vale-20)*24.50));
}
else
{
charges=(1080+((vale-40)*19.50));
}
return charges;
}
String bookingName;
Integer guests;
}
Screenshots
Welcome and Exit message

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Prompting user to input booking name

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Number of Guests

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Error prompts while asking input from user
Booking name validation

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Number of Guests field left blank

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Display error due to lack of Data

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Sorting error due to lack of entries

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Search for a specific booking

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Booking name not found

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Output of option 2

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Option 3 for Statistics

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Exit option

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Sorted List of Booking

27JAVA PROGRAM USING ARRAY OF OBJECTS
Search result