Answered: e rooms are then automatically created…

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

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I need help in coding these two classes(dorm and room) in JAVA from the following information-> *A dormitory has a name and has several rooms. When a dormitory is built, the name and the number of rooms should be provided. In some cases, the maximum capacity of the rooms is also provided. If there is no maximum capacity set, each room can accommodate at most 6 guests. *The rooms are then automatically created and added to the dormitory, numbered from 1, 2, 3, and so on, representing the room number. Once the room number is assigned to the created room, this information cannot be edited anymore. *The dormitory can accept guests into a given room number. Each guest has a name and nationality. If the capacity is full or an invalid room number is provided, the guest will not be added and this method returns false. Otherwise, this method returns true. *The dormitory also has a method to return the guests in a given room number. If an invalid room number is provided, the method will return null. *Private instantiation variable(attributes) in the two classes are allowed and not public. The guest class(we can make use of) is already coded like this-> import java.util.*; class Main implements Comparator { @Override public int compare(meeting o1, meeting o2) { if (o1.end < o2.end) { return -1; } else if (o1.end > o2.end) return 1; return 0; } } class meeting { int start; int end; int pos; meeting(int start, int end, int pos) { this.start = start; this.end = end; this.pos = pos; } } class GFG { public static void maxMeeting(ArrayList al, int s) { ArrayList m = new ArrayList<>(); int time_limit = 0; Main mc = new Main(); Collections.sort(al, mc); m.add(al.get(0).pos); time_limit = al.get(0).end; for (int i = 1; i < al.size(); i++) { if (al.get(i).start > time_limit) { m.add(al.get(i).pos); time_limit = al.get(i).end; } } for (int i = 0; i < m.size(); i++) System.out.print(m.get(i) + 1 + " "); } public static void main(String[] args) { int s[] = { 1, 3, 0, 5, 8, 5 }; int f[] = { 2, 4, 6, 7, 9, 9 }; ArrayList meet = new ArrayList<>(); for (int i = 0; i < s.length; i++) meet.add(new meeting(s[i], f[i], i)); maxMeeting(meet, meet.size()); } }

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