use the txt file in this java code.

Booking.java:

package booking;

import java.util.*;

import java.io.FileWriter;

public class Booking {

public static void main(String[] args) {

Scanner obj=new Scanner(System.in);

System.out.println("enter the name of the hotel ");

String hotelname=obj.nextLine();

Random random=new Random();

int countofrooms=random.nextInt(100);

while(countofrooms<=10)

{

countofrooms=random.nextInt(100);

}

//random type of room

int index=0;

//declaring a rooms array

Room rooms[]=new Room[countofrooms];

while(index

{

int type=random.nextInt(4);

while(type==0)

type=random.nextInt(4);

Room room=null;

switch(type)

{

case 1:room=new Room("king");

break;

case 2:room=new Room("queen");

break;

case 3:room=new Room("double");

break;

case 4: room = new Room("Cabanna");

break;

case 5: room = new Room(" ajoining");

}

rooms[index]=room;

index++;

}

//creating a hotel object

Hotel hotel=new Hotel(hotelname,rooms);

int input=-1;

do{

String rname,rtype;

switch(input)

{

case 1: System.out.println("Enter the name for a reservation.");

rname=obj.nextLine();//to bypass the consumption of new line

rname=obj.nextLine();

System.out.println("Enter the type of room to be reserved.");

rtype=obj.nextLine();

hotel.createReservation(rname, rtype);

break;

case 2:System.out.println("Enter the name by which the reservation is made.");

rname=obj.nextLine();//to bypass the consumption of new line

rname=obj.nextLine();

System.out.println("Enter the type of room reserved.");

rtype=obj.nextLine();

hotel.cancelReservation(rname, rtype);

break;

case 3:System.out.println("Enter a name for the invoice.");

rname=obj.nextLine();//to bypass

rname=obj.nextLine();

hotel.printInvoice(rname);

break;

case 4:System.out.println(hotel.toString());

break;

}

System.out.println("1.Make a reservation");

System.out.println("2.Cancel a reservation");

System.out.println("3.See an invoice");

System.out.println("4.See the hotel info");

System.out.println("5.Exit the booking system");

}while((input=obj.nextInt())!=5);

}

}

Hotel.java:

package booking; import java.util.NoSuchElementException;

class Hotel{

private String name;

private Room rooms[];

private Reservation reservation[];

private int index=-1;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Room[] getRooms() {

return rooms;

}

public void setRooms(Room[] rooms) {

this.rooms = rooms;

}

public Reservation[] getReservation() {

return reservation;

}

public void setReservation(Reservation[] reservation) {

this.reservation = reservation;

}

public Hotel(String name,Room rooms[])

{

this.rooms=rooms;

this.name=name;

reservation=new Reservation[rooms.length];

}

public void addReservation(Reservation reservation)

{

//add into the reservation array

this.reservation[++index]=reservation;

}

public void createReservation(String name,String type)

{

Room test=new Room();

Room room=test.findAvailableRoom(rooms, type);

if(room==null)

{

//print an error message

System.out.println("No such type of rooms are available at the moment.");

}

else{

room.setAvailability(false);

Reservation reserve=new Reservation(room,name);

addReservation(reserve);

}

}

public boolean removeReservation(String name,String type)

{

boolean flag=false;

for(int i=0;i<=index;i++)

{

if(reservation[i].getName().equals(name)&&reservation[i].getRoom().getType().equals(type))

{

flag=true;//found a reservation

reservation[i].getRoom().setAvailability(true);

//remove this reservation

int p=i;

for(int j=i+1;j

{

reservation[p]=reservation[j];

p++;

}

reservation[reservation.length-1]=null;

index--;

break;

}

}

try{

if(!flag)

throw new NoSuchElementException();

}

catch(Exception e)

{

System.out.println("No such reservation found !");

}

return flag;

}

public void cancelReservation(String name,String type)

{

boolean flag=removeReservation(name,type);

if(flag)

System.out.println("cancelled the reservation successfully.");

}

public void printInvoice(String name)

{

double bill=0;

for(int i=0;i<=index;i++)

{

if(reservation[i].getName().equals(name))

{

bill+=reservation[i].getRoom().getPrice();

}

}

if(bill==0)

System.out.println("No payable amount due.");

else

System.out.println("The user "+name+" has a payable amount of $"+bill+" ");

}

public String toString()

{

int queen=0;

int king=0;

int double_=0; int cabanna =0; int ajoining=0;

for(int i=0;i

{

if(rooms[i].getType().equals("king"))

king++;

else if(rooms[i].getType().equals("queen"))

queen++;

else

double_++;

}

return ("Hotel : "+name+" "+"Rooms: King:"+king+" queen:"+queen+" double:"+double_+" cabanna:"+cabanna+" ajoining: "+ajoining+" ");

}

}

reservation.java:

package booking;

class Reservation{

private String name;

private Room roomReserved;

public Reservation(Room room,String name)

{

this.name=name;

roomReserved=room;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Room getRoom() {

return roomReserved;

}

public void setRoom(Room roomReserved) {

this.roomReserved = roomReserved;

}

}

room.java:

package booking;

import java.util.NoSuchElementException;

import java.util.Random;

import java.util.Scanner;

class Room{

private String type;

private double price;

private boolean availability;

public Room()

{

//default constructor

}

public Room(String type)

{

this.type=type;

try{

if(type.equals("cabanna"))

{

price = 200;

}

if (type.equals("ajoining"))

{

price = 95;

}

if(type.equals("king"))

{

price=160;

}

else if(type.equals("queen"))

{

price=130;

}

else if(type.equals("double"))

{

price=97;

}

else

throw new IllegalArgumentException();

}

catch(Exception e)

{

System.out.println("The type of room specified is INVALID.");

}

availability=true;

}

public String getType() {

return type;

}

public void setType(String type) {

this.type = type;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public boolean getAvailability() {

return availability;

}

public void setAvailability(boolean availability) {

this.availability = availability;

}

//additional methods

public void changeAvailability()

{

this.availability=!availability;

}

public Room findAvailableRoom(Room rooms[],String type)

{

for(int i=0;i

{

if(rooms[i].getAvailability()&&rooms[i].getType().equals(type))

return rooms[i];

}

return null;

}

}

booking.txt:

1 Bob Mike king 160 1 Matt Benjamin King 160 2 Keller Helen Ajoining 95 3 Tim Mary Cabanna 200 4 James Alan Double 3 William Robin Cabbana 200 4 Jacob Tom double 97 2 Nathan Norman ajoining 95 5 martha helen queen 130