Question

I have this problem now and I am not sure what we are exactly supposed to be sorting in ascending order. I am in java programming two and this is my first time using Cengage (online program), so I am unaware of the problems leading up to this one. I have provided the question and the code my professor provided the class, but with COVID-19 pushing our class to online we are not getting any assistance from the professor now. Can someone please help me?

Question

In Chapter 8, you modified the EventDemo program for Carly's Catering to accept and display data for an array of three Event objects. Now, modify the program to use an array of eight Event objects. Prompt the user to choose an option to sort Events in ascending order by event number, number of guests, or event type. Display the sorted list, and continue to prompt the user for sorting options until the user enters a sentinel value.

Previous Code provided by prof.

public class Event {
public final int lowpricePerGuest = 32;
public final int highpricePerGuest = 35;
public final int cutOffValue = 50;
private String eventNumber;
private int numberofGuests;
private double price;
//Code changes for Unit 4 case problem
Event()
{
this("AOOO",0);
//System.out.println("Inside the default constructor");
}
Event( double x, int guests)
{
}
Event( float x, int guests)
{
}
Event(String eventnum, int guests)
{
//System.out.println("Inside the overloaded constructor");
//System.out.println("eventType is" + eventnum);
//System.out.println("number of guests is" + guests);
//calling member function setEventNumber to initialize eventID
setEventNumber(eventnum);
setNumberofGuests(guests);
}
//End Code changes for Unit 4 case problem
public void setEventNumber(String eventNum)
{
eventNumber = eventNum;
}
public void setNumberofGuests(int numofguests)
{
numberofGuests = numofguests;
//changes made as part of case number 5
if (numofguests >= cutOffValue)
price = numberofGuests * lowpricePerGuest;
else
price = numberofGuests * highpricePerGuest;
//if (numofguests < cutOffValue)
//price = numberofGuests * highpricePerGuest;
}
//this function returns the event number
//defined in the class object.
public String getEventNumber()
{
return eventNumber;
}
public int getNumberofGuests()
{
return numberofGuests;
}
//this function calculates price and
//returns a double back to calling function
public double getPrice()
{
return price;
}
//***Start chapter 5 case problem *****
//this function returns price Per guests
public int getPricePerGuest()
{
return 0;
}
//this function checks if event is large,
//and if true it will return true, otherwise it will return false
public boolean isLargeEvent(){
{
if (numberofGuests >= cutOffValue)
return true;
else
return false;
}
}
}

This was Chapter 7's question

In previous chapters, you developed classes that work with catering event information for Carly's Catering. Now modify the Event and EventDemo classes as follows:

• Modify the Event class to include an integer field that holds an event type. Add a final String array that holds names of the types of events that Carly's caters—wedding, baptism, birthday, corporate, and other. Include get and set methods for the integer event type field. If the argument passed to the method that sets the event type is larger than the size of the array of String event types, then set the integer to the element number occupied by other. Include a get method that returns an event's String event type based on the numeric event type.
• To keep the EventDemo class simple, remove all the statements that compare event sizes and that display the invitation Strings.
• Modify the EventDemo class so that instead of creating three single Event objects, it uses an array of three Event objects. Get data for each of the objects, and then display all the details for each object.

here is a chegg study q&a's for this problem but the answer doesnt look right or make sense to me

https://www.chegg.com/homework-help/questions-and-answers/please-help-question-java-programming-8th-edition-joyce-farrell-chapter-9-case-problem-las-q27320222

Answer 1

If you want any information regarding code please let me know in comments.

Here is the working code for above question:

1) Sort Events in ascending order by event number, number of guests, or event type.(done)

2) Rectified mistakes in the code.

import java.util.*;
import java.util.Scanner;

class comp implements Comparator<Event>{
   public int compare(Event e1,Event e2){
       return e1.eventNum.compareTo(e2.eventNum);
   }
}

class comps implements Comparator<Event>{
   public int compare(Event e1,Event e2){
       return e1.getEvents().compareTo(e2.getEvents());
   }
}

class compp implements Comparator<Event>{
   public int compare(Event e1,Event e2){
       return e1.getGuestsCount()-e2.getGuestsCount();
   }
}

class Event{

public static double highGuestPrice = 35.00;
public static double lowGuestPrice = 32.00;
public static final int MAX_LARGE_EVENT = 50;
public String phoneNum = "";
public String eventNum = "";
private int guests;
private double pricePerEvent;
private int eventType;
private final String[] EVENT_TYPES = {"wedding", "baptism", "birthday",
"corporate", "other"};
public int getEventType()
{
return this.eventType;   
}
public void setEventType(int eventType1)
{
if(eventType1 >= EVENT_TYPES.length)
{
this.eventType = EVENT_TYPES.length - 1;
}
else
{
this.eventType = eventType1;
}
}
public String getEvents()
{
return EVENT_TYPES[this.eventType];
}
public void setPhoneNumber()
{
Scanner scanner = new Scanner(System.in);
int count = 0;
System.out.println("Please enter phone number:");
String phNum = scanner.nextLine();
int len = phNum.length();
for(int i=0; i < len; i++)
{
char c = phNum.charAt(i);
if(Character.isDigit(c))
{
count++;
String ss = Character.toString(c);
phoneNum = phoneNum.concat(ss);
}
}
if(count!=10)
{
phoneNum = "";
phoneNum = phoneNum.concat("6133574628");
}
}
public String getPhoneNumber()
{
String ret = ("" + this.phoneNum.charAt(0)
+ "" + this.phoneNum.charAt(1) + "" + this.phoneNum.charAt(2)
+ "" + this.phoneNum.charAt(3) + "" + this.phoneNum.charAt(4)
+ "" + this.phoneNum.charAt(5) + "" + this.phoneNum.charAt(6)
+ "" + this.phoneNum.charAt(7) + "" + this.phoneNum.charAt(8)
+ "" + this.phoneNum.charAt(9));
return ret;
}
public void setGuests(int guests)
{
this.guests = guests;
if(isLargeEvent())
pricePerEvent = highGuestPrice;
else
pricePerEvent = lowGuestPrice;
}
public int getGuestsCount()
{
return guests;
}
public boolean isLargeEvent()
{
if(guests >= MAX_LARGE_EVENT)
{
return true;
}
else
{
return false;
}
}
public void setEventNumber(int n)
{
eventNum=String.valueOf(n);
}
public String getEventNumber()
{
String ret1 = "Event Number: " + this.eventNum;
return ret1;
}
public int getGuests(boolean largeEvent)
{
return guests;
}
}

class EventDemo {
  
static Scanner scanner = new Scanner(System.in);
  
public static void main(String[] args)
{
final int SIZE = 8;
int eventType;
Event[] eventObjects = new Event[SIZE];
int guestNum;
for (int i=0; i < eventObjects.length; i++)
{
eventObjects[i] = new Event();
System.out.println("Please enter Event Number: ");
eventType = scanner.nextInt();
eventObjects[i].setEventType(eventType);
eventObjects[i].setEventNumber(eventType);
System.out.println("The name of the event is: "
+ eventObjects[i].getEvents());
eventObjects[i].setPhoneNumber();
  
do
{
System.out.println("Please enter the number of guests:");
guestNum = scanner.nextInt();
if(guestNum < 5 || guestNum > 100)
System.out.println("Number of guests must be between 5 "
+ "and 100.");
}while(guestNum < 5 || guestNum > 100);
eventObjects[i].setGuests(guestNum);
}
/*for(int i=0; i < SIZE; i++)
{
System.out.println("" + eventObjects[i].getEventNumber()
+ "contact number: " + eventObjects[i].getPhoneNumber()
+ "printing message " + eventObjects[i].getGuestsCount());
}*/
int x=0;
do{
System.out.println();
System.out.println("Enter 1 to sort based on Event Number:");
System.out.println("Enter 2 to sort based on Number of Guests:");
System.out.println("Enter 3 to sort based on Event Type:");
System.out.println("Enter any number other than 1,2,3 to quit:");
System.out.println();
x=scanner.nextInt();
if(x==1){
   Arrays.sort(eventObjects,new comp());
for(int i=0; i < SIZE; i++)
{
System.out.println("" + eventObjects[i].getEventNumber()
+ " contact number: " + eventObjects[i].getPhoneNumber()
+ " Guests " + eventObjects[i].getGuestsCount()+
" EventType "+eventObjects[i].getEvents());
}
}
else if(x==3){
   Arrays.sort(eventObjects,new comps());
for(int i=0; i < SIZE; i++)
{
System.out.println("" + eventObjects[i].getEventNumber()
+ " contact number: " + eventObjects[i].getPhoneNumber()
+ " Guests " + eventObjects[i].getGuestsCount()+
" EventType "+eventObjects[i].getEvents());
}
}
else if(x==2){
   Arrays.sort(eventObjects,new compp());
for(int i=0; i < SIZE; i++)
{
System.out.println("" + eventObjects[i].getEventNumber()
+ " contact number: " + eventObjects[i].getPhoneNumber()
+ " Guests " + eventObjects[i].getGuestsCount()+
" EventType "+eventObjects[i].getEvents());
}
}
}while(x<=3&&x>=1);
}
}