The owner of a venue for events needs software to keep track of reservations. The venue can handle two events in a day, one scheduled for the afternoon and another scheduled for the evening. Each event consists of the type (wedding, bar mitzvah, etc.), the date of the event, and whether or not the event will be held in the evening. A programmer writes the code given on the handout. import java.util.Linkedlist; class Event { string type; Date date; I/ wedding, etc. boolean isevening; I/ true if the event is to be held in the evening public Event(String type, Date date, boolean isEvening) { this.type = type; this.date = date; this.isEvening = isEvening; class Date { String month; int day; int year; public Date(String month, int day, int year) { this.month = month; this.day = day; this.year = year; class Reservations { LinkedList events; public Reservations() { this.events = new LinkedList (); I/ adds the given event to the events list, as long as there is no // date/time conflict with existing events in the list. // returns true if the event was added, false otherwise boolean bookEvent(Event newEvent) { if (events.size() == ®) { events.add(newEvent); return true; `I/ no other events, so no conflicts else { for (Event e: this.events) { if (hasconflict(newEvent, e)) return false; ii conflict found, event not added events.add(newEvent); return true; I/ no conflicts, so add event // returns true if a conflict boolean hasconflict (Event e1, Event e2){ return datesame(e1.date, e2.date) & e1.isEvening == e2.isEvening; // returns true if both dates are the same boolean datesame(Date di, Date d2) { return di.month.equals(d2.month) && d1.day == d2.day && di.year d2.year;
The owner of a venue for events needs software to keep track of reservations. The venue can handle two events in a day, one scheduled for the afternoon and another scheduled for the evening. Each event consists of the type (wedding, bar mitzvah, etc.), the date of the event, and whether or not the event will be held in the evening. A programmer writes the code given on the handout. import java.util.Linkedlist; class Event { string type; Date date; I/ wedding, etc. boolean isevening; I/ true if the event is to be held in the evening public Event(String type, Date date, boolean isEvening) { this.type = type; this.date = date; this.isEvening = isEvening; class Date { String month; int day; int year; public Date(String month, int day, int year) { this.month = month; this.day = day; this.year = year; class Reservations { LinkedList events; public Reservations() { this.events = new LinkedList (); I/ adds the given event to the events list, as long as there is no // date/time conflict with existing events in the list. // returns true if the event was added, false otherwise boolean bookEvent(Event newEvent) { if (events.size() == ®) { events.add(newEvent); return true; `I/ no other events, so no conflicts else { for (Event e: this.events) { if (hasconflict(newEvent, e)) return false; ii conflict found, event not added events.add(newEvent); return true; I/ no conflicts, so add event // returns true if a conflict boolean hasconflict (Event e1, Event e2){ return datesame(e1.date, e2.date) & e1.isEvening == e2.isEvening; // returns true if both dates are the same boolean datesame(Date di, Date d2) { return di.month.equals(d2.month) && d1.day == d2.day && di.year d2.year;
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Transcribed Image Text:The owner of a venue for events needs software to keep track of reservations. The venue can handle
two events in a day, one scheduled for the afternoon and another scheduled for the evening. Each
event consists of the type (wedding, bar mitzvah, etc.), the date of the event, and whether or not the
event will be held in the evening. A programmer writes the code given on the handout.
import java.util.LinkedList;
class Event {
// wedding, etc.
String type;
Date date;
boolean isEvening;
// true if the event is to be held in the evening
public Event(string type, Date date, boolean isEvening) {
this.type - type;
this.date = date;
this.isEvening = isEvening;
}
class Date {
string month;
int day;
int year;
public Date(string month, int day, int year) {
this.month = month;
this.day = day;
this.year = year;
class Reservations {
LinkedList<Event> events;
public Reservations() {
this.events = new LinkedList<Event>();
// adds the given event to the events list, as long as there is no
// date/time conflict with existing events in the list.
// returns true if the event was added, false otherwise
boolean bookEvent (Event newEvent) {
if (events.size() == 0) {
events.add(newEvent);
return true;
}
else {
// no other events, so no conflicts
for (Event e: this.events) {
if (hasconflict(newEvent, e))
return false;
/i conflict found, event not added
}
events.add(newEvent);
return true;
// no conflicts, so add event
// returns true if a conflict
boolean hasconflict (Event e1, Event e2){
return datesame(e1.date, e2.date) && e1.isEvening = e2.isEvening;
}
// returns true if both dates are the same
boolean datesame (Date di, Date d2) {
return d1.month.equals (d2. month) && d1.day == d2.day && d1.year == d2.year;
}
}
Transcribed Image Text:Rewrite the above code so that
• It has all of the correct access modifiers for good encapsulation.
• Your code obeys the principle of encapsulation that obliges you to put each method in the proper
class.
• Your code uses NO getters and NO additional classes or methods. You are welcome to modify
any existing methods (including signatures and bodies) and/or move them between the existing
classes.
• Your code DOES NOT modify any of the constructors.
Important notes:
• You DO NOT have to write a main method.
• You DO NOT have to write tests.
• You DO NOT have to write Javadocs.
• You DO NOT have to write interfaces to encapsulate data structures.
• There should be no incorrect syntax or other compile-time errors.
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