diff --git a/Main.java b/Main.java
index 2255c0a..00e69fa 100755
--- a/Main.java
+++ b/Main.java
@@ -1,588 +1,287 @@
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
-import java.io.Serializable;
+import java.io.*;
 import java.util.ArrayList;
 import java.util.Scanner;
 
-class Food implements Serializable
-{
-    int itemno;
+class Food implements Serializable {
+    int itemNo;
     int quantity;   
     float price;
     
-    Food(int itemno,int quantity)
-    {
-        this.itemno=itemno;
-        this.quantity=quantity;
-        switch(itemno)
-        {
-            case 1:price=quantity*50;
-                break;
-            case 2:price=quantity*60;
-                break;
-            case 3:price=quantity*70;
-                break;
-            case 4:price=quantity*30;
-                break;
+    Food(int itemNo, int quantity) {
+        this.itemNo = itemNo;
+        this.quantity = quantity;
+        this.price = calculatePrice(itemNo, quantity);
+    }
+
+    private float calculatePrice(int itemNo, int quantity) {
+        switch (itemNo) {
+            case 1: return quantity * 50;
+            case 2: return quantity * 60;
+            case 3: return quantity * 70;
+            case 4: return quantity * 30;
+            default: return 0;
         }
     }
 }
-class Singleroom implements Serializable
-{
+
+class SingleRoom implements Serializable {
     String name;
     String contact;
     String gender;   
-    ArrayList<Food> food =new ArrayList<>();
+    ArrayList<Food> foodOrders = new ArrayList<>();
 
-   
-    Singleroom()
-    {
-        this.name="";
-    }
-    Singleroom(String name,String contact,String gender)
-    {
-        this.name=name;
-        this.contact=contact;
-        this.gender=gender;
+    SingleRoom(String name, String contact, String gender) {
+        this.name = name;
+        this.contact = contact;
+        this.gender = gender;
     }
 }
-class Doubleroom extends Singleroom implements Serializable
-{ 
+
+class DoubleRoom extends SingleRoom {
     String name2;
     String contact2;
     String gender2;  
-    
-    Doubleroom()
-    {
-        this.name="";
-        this.name2="";
-    }
-    Doubleroom(String name,String contact,String gender,String name2,String contact2,String gender2)
-    {
-        this.name=name;
-        this.contact=contact;
-        this.gender=gender;
-        this.name2=name2;
-        this.contact2=contact2;
-        this.gender2=gender2;
+
+    DoubleRoom(String name, String contact, String gender, String name2, String contact2, String gender2) {
+        super(name, contact, gender);
+        this.name2 = name2;
+        this.contact2 = contact2;
+        this.gender2 = gender2;
     }
 }
-class NotAvailable extends Exception
-{
+
+class NotAvailable extends Exception {
     @Override
-    public String toString()
-    {
-        return "Not Available !";
+    public String toString() {
+        return "Not Available!";
     }
 }
 
-class holder implements Serializable
-{
-    Doubleroom luxury_doublerrom[]=new Doubleroom[10]; //Luxury
-    Doubleroom deluxe_doublerrom[]=new Doubleroom[20]; //Deluxe
-    Singleroom luxury_singleerrom[]=new Singleroom[10]; //Luxury
-    Singleroom deluxe_singleerrom[]=new Singleroom[20]; //Deluxe
+class HotelRooms implements Serializable {
+    DoubleRoom[] luxuryDoubleRooms = new DoubleRoom[10]; 
+    DoubleRoom[] deluxeDoubleRooms = new DoubleRoom[20]; 
+    SingleRoom[] luxurySingleRooms = new SingleRoom[10]; 
+    SingleRoom[] deluxeSingleRooms = new SingleRoom[20]; 
 }
 
-class Hotel
-{
-    static holder hotel_ob=new holder();
-    static Scanner sc = new Scanner(System.in);
-    static void CustDetails(int i,int rn)
-    {
+class Hotel {
+    static HotelRooms hotelData = new HotelRooms();
+    static Scanner scanner = new Scanner(System.in);
+
+    static void enterCustomerDetails(int roomType, int roomIndex) {
         String name, contact, gender;
         String name2 = null, contact2 = null; 
-        String gender2="";
-        System.out.print("\nEnter customer name: ");
-        name = sc.next();
-        System.out.print("Enter contact number: ");
-        contact=sc.next();
-        System.out.print("Enter gender: ");
-        gender = sc.next();
-        if(i<3)
-        {
-        System.out.print("Enter second customer name: ");
-        name2 = sc.next();
+        String gender2 = "";
+
+        System.out.print("Enter customer name: ");
+        name = scanner.next();
         System.out.print("Enter contact number: ");
-        contact2=sc.next();
+        contact = scanner.next();
         System.out.print("Enter gender: ");
-        gender2 = sc.next();
-        }      
-        
-          switch (i) {
-            case 1:hotel_ob.luxury_doublerrom[rn]=new Doubleroom(name,contact,gender,name2,contact2,gender2);
-                break;
-            case 2:hotel_ob.deluxe_doublerrom[rn]=new Doubleroom(name,contact,gender,name2,contact2,gender2);
-                break;
-            case 3:hotel_ob.luxury_singleerrom[rn]=new Singleroom(name,contact,gender);
-                break;
-            case 4:hotel_ob.deluxe_singleerrom[rn]=new Singleroom(name,contact,gender);
-                break;
-            default:System.out.println("Wrong option");
-                break;
+        gender = scanner.next();
+
+        if (roomType < 3) { // If it's a double room
+            System.out.print("Enter second customer name: ");
+            name2 = scanner.next();
+            System.out.print("Enter second contact number: ");
+            contact2 = scanner.next();
+            System.out.print("Enter second gender: ");
+            gender2 = scanner.next();
+        }
+
+        switch (roomType) {
+            case 1: hotelData.luxuryDoubleRooms[roomIndex] = new DoubleRoom(name, contact, gender, name2, contact2, gender2); break;
+            case 2: hotelData.deluxeDoubleRooms[roomIndex] = new DoubleRoom(name, contact, gender, name2, contact2, gender2); break;
+            case 3: hotelData.luxurySingleRooms[roomIndex] = new SingleRoom(name, contact, gender); break;
+            case 4: hotelData.deluxeSingleRooms[roomIndex] = new SingleRoom(name, contact, gender); break;
+            default: System.out.println("Wrong option"); break;
         }
     }
-    
-    static void bookroom(int i)
-    {
-        int j;
-        int rn;
-        System.out.println("\nChoose room number from : ");
-        switch (i) {
-            case 1:
-                for(j=0;j<hotel_ob.luxury_doublerrom.length;j++)
-                {
-                    if(hotel_ob.luxury_doublerrom[j]==null)
-                    {
-                        System.out.print(j+1+",");
-                    }
-                }
-                System.out.print("\nEnter room number: ");
-                try{
-                rn=sc.nextInt();
-                rn--;
-                if(hotel_ob.luxury_doublerrom[rn]!=null)
-                    throw new NotAvailable();
-                CustDetails(i,rn);
-                }
-                catch(Exception e)
-                {
-                    System.out.println("Invalid Option");
-                    return;
-                }
-                break;
-            case 2:
-                 for(j=0;j<hotel_ob.deluxe_doublerrom.length;j++)
-                {
-                    if(hotel_ob.deluxe_doublerrom[j]==null)
-                    {
-                        System.out.print(j+11+",");
-                    }
-                }
-                System.out.print("\nEnter room number: ");
-                try{
-                rn=sc.nextInt();
-                rn=rn-11;
-                if(hotel_ob.deluxe_doublerrom[rn]!=null)
-                    throw new NotAvailable();
-                CustDetails(i,rn);
-                }
-                catch(Exception e)
-                {
-                    System.out.println("Invalid Option");
-                    return;
-                }
-                break;
-            case 3:
-                  for(j=0;j<hotel_ob.luxury_singleerrom.length;j++)
-                {
-                    if(hotel_ob.luxury_singleerrom[j]==null)
-                    {
-                        System.out.print(j+31+",");
-                    }
-                }
-                System.out.print("\nEnter room number: ");
-                try{
-                rn=sc.nextInt();
-                rn=rn-31;
-                if(hotel_ob.luxury_singleerrom[rn]!=null)
-                    throw new NotAvailable();
-                CustDetails(i,rn);
-                }
-                catch(Exception e)
-                {
-                    System.out.println("Invalid Option");
-                    return;
-                }
-                break;
-            case 4:
-                  for(j=0;j<hotel_ob.deluxe_singleerrom.length;j++)
-                {
-                    if(hotel_ob.deluxe_singleerrom[j]==null)
-                    {
-                        System.out.print(j+41+",");
-                    }
-                }
-                System.out.print("\nEnter room number: ");
-                try{
-                rn=sc.nextInt();
-                rn=rn-41;
-                if(hotel_ob.deluxe_singleerrom[rn]!=null)
-                    throw new NotAvailable();
-                CustDetails(i,rn);
-                }
-                catch(Exception e)
-                {
-                   System.out.println("Invalid Option");
-                    return;
-                }
-                break;
-            default:
-                System.out.println("Enter valid option");
-                break;
+
+    static void bookRoom(int roomType) {
+        int roomIndex = findAvailableRoom(roomType);
+        if (roomIndex != -1) {
+            enterCustomerDetails(roomType, roomIndex);
+            System.out.println("Room Booked");
+        } else {
+            System.out.println("No rooms available!");
         }
-        System.out.println("Room Booked");
     }
-    
-    static void features(int i)
-    {
-        switch (i) {
-            case 1:System.out.println("Number of double beds : 1\nAC : Yes\nFree breakfast : Yes\nCharge per day:4000 ");
-                break;
-            case 2:System.out.println("Number of double beds : 1\nAC : No\nFree breakfast : Yes\nCharge per day:3000  ");
-                break;
-            case 3:System.out.println("Number of single beds : 1\nAC : Yes\nFree breakfast : Yes\nCharge per day:2200  ");
-                break;
-            case 4:System.out.println("Number of single beds : 1\nAC : No\nFree breakfast : Yes\nCharge per day:1200 ");
-                break;
-            default:
-                System.out.println("Enter valid option");
-                break;
+
+    static int findAvailableRoom(int roomType) {
+        int startIndex = 0, endIndex = 0;
+
+        switch (roomType) {
+            case 1: startIndex = 0; endIndex = hotelData.luxuryDoubleRooms.length; break;
+            case 2: startIndex = 0; endIndex = hotelData.deluxeDoubleRooms.length; break;
+            case 3: startIndex = 0; endIndex = hotelData.luxurySingleRooms.length; break;
+            case 4: startIndex = 0; endIndex = hotelData.deluxeSingleRooms.length; break;
+            default: System.out.println("Enter valid option"); return -1;
+        }
+
+        for (int j = startIndex; j < endIndex; j++) {
+            if ((roomType == 1 && hotelData.luxuryDoubleRooms[j] == null) || 
+                (roomType == 2 && hotelData.deluxeDoubleRooms[j] == null) ||
+                (roomType == 3 && hotelData.luxurySingleRooms[j] == null) ||
+                (roomType == 4 && hotelData.deluxeSingleRooms[j] == null)) {
+                return j;
+            }
         }
+        return -1; // No available room
     }
-    
-    static void availability(int i)
-    {
-      int j,count=0;
-        switch (i) {
-            case 1:
-                for(j=0;j<10;j++)
-                {
-                    if(hotel_ob.luxury_doublerrom[j]==null)
-                        count++;
-                }
-                break;
-            case 2:
-                for(j=0;j<hotel_ob.deluxe_doublerrom.length;j++)
-                {
-                    if(hotel_ob.deluxe_doublerrom[j]==null)
-                        count++;
-                }
-                break;
-            case 3:
-                for(j=0;j<hotel_ob.luxury_singleerrom.length;j++)
-                {
-                    if(hotel_ob.luxury_singleerrom[j]==null)
-                        count++;
-                }
-                break;
-            case 4:
-                for(j=0;j<hotel_ob.deluxe_singleerrom.length;j++)
-                {
-                    if(hotel_ob.deluxe_singleerrom[j]==null)
-                        count++;
-                }
-                break;
-            default:
-                System.out.println("Enter valid option");
-                break;
+
+    static void displayFeatures(int roomType) {
+        switch (roomType) {
+            case 1: System.out.println("Luxury Double Room: AC: Yes, Free breakfast: Yes, Charge per day: 4000"); break;
+            case 2: System.out.println("Deluxe Double Room: AC: No, Free breakfast: Yes, Charge per day: 3000"); break;
+            case 3: System.out.println("Luxury Single Room: AC: Yes, Free breakfast: Yes, Charge per day: 2200"); break;
+            case 4: System.out.println("Deluxe Single Room: AC: No, Free breakfast: Yes, Charge per day: 1200"); break;
+            default: System.out.println("Enter valid option"); break;
         }
-        System.out.println("Number of rooms available : "+count);
     }
-    
-    static void bill(int rn,int rtype)
-    {
-        double amount=0;
-        String list[]={"Sandwich","Pasta","Noodles","Coke"};
+
+    static void checkAvailability(int roomType) {
+        int count = 0;
+        switch (roomType) {
+            case 1: for (DoubleRoom room : hotelData.luxuryDoubleRooms) if (room == null) count++; break;
+            case 2: for (DoubleRoom room : hotelData.deluxeDoubleRooms) if (room == null) count++; break;
+            case 3: for (SingleRoom room : hotelData.luxurySingleRooms) if (room == null) count++; break;
+            case 4: for (SingleRoom room : hotelData.deluxeSingleRooms) if (room == null) count++; break;
+            default: System.out.println("Enter valid option"); return;
+        }
+        System.out.println("Number of rooms available: " + count);
+    }
+
+    static void generateBill(int roomIndex, int roomType) {
+        double amount = 0;
+        String[] foodItems = {"Sandwich", "Pasta", "Noodles", "Coke"};
+
+        switch (roomType) {
+            case 1: amount += 4000; break;
+            case 2: amount += 3000; break;
+            case 3: amount += 2200; break;
+            case 4: amount += 1200; break;
+            default: System.out.println("Invalid room type"); return;
+        }
+
         System.out.println("\n*******");
         System.out.println(" Bill:-");
         System.out.println("*******");
-               
-        switch(rtype)
-        {
-            case 1:
-                amount+=4000;
-                    System.out.println("\nRoom Charge - "+4000);
-                    System.out.println("\n===============");
-                    System.out.println("Food Charges:- ");
-                    System.out.println("===============");
-                     System.out.println("Item   Quantity    Price");
-                    System.out.println("-------------------------");
-                    for(Food obb:hotel_ob.luxury_doublerrom[rn].food)
-                    {
-                        amount+=obb.price;
-                        String format = "%-10s%-10s%-10s%n";
-                        System.out.printf(format,list[obb.itemno-1],obb.quantity,obb.price );
-                    }
-                    
-                break;
-            case 2:amount+=3000;
-                    System.out.println("Room Charge - "+3000);
-                    System.out.println("\nFood Charges:- ");
-                    System.out.println("===============");
-                     System.out.println("Item   Quantity    Price");
-                    System.out.println("-------------------------");
-                    for(Food obb:hotel_ob.deluxe_doublerrom[rn].food)
-                    {
-                        amount+=obb.price;
-                        String format = "%-10s%-10s%-10s%n";
-                        System.out.printf(format,list[obb.itemno-1],obb.quantity,obb.price );
-                    }
-                break;
-            case 3:amount+=2200;
-                    System.out.println("Room Charge - "+2200);
-                    System.out.println("\nFood Charges:- ");
-                    System.out.println("===============");
-                    System.out.println("Item   Quantity    Price");
-                    System.out.println("-------------------------");
-                    for(Food obb:hotel_ob.luxury_singleerrom[rn].food)
-                    {
-                        amount+=obb.price;
-                        String format = "%-10s%-10s%-10s%n";
-                        System.out.printf(format,list[obb.itemno-1],obb.quantity,obb.price );
-                    }
-                break;
-            case 4:amount+=1200;
-                    System.out.println("Room Charge - "+1200);
-                    System.out.println("\nFood Charges:- ");
-                    System.out.println("===============");
-                    System.out.println("Item   Quantity    Price");
-                    System.out.println("-------------------------");
-                    for(Food obb: hotel_ob.deluxe_singleerrom[rn].food)
-                    {
-                        amount+=obb.price;
-                        String format = "%-10s%-10s%-10s%n";
-                        System.out.printf(format,list[obb.itemno-1],obb.quantity,obb.price );
-                    }
-                break;
-            default:
-                System.out.println("Not valid");
+        System.out.println("Room Charge - " + amount);
+
+        System.out.println("\nFood Charges:- ");
+        System.out.println("===============");
+        System.out.println("Item   Quantity    Price");
+        System.out.println("-------------------------");
+
+        ArrayList<Food> foodOrders = (roomType <= 2) ? hotelData.luxuryDoubleRooms[roomIndex].foodOrders : hotelData.luxurySingleRooms[roomIndex].foodOrders;
+        
+        for (Food food : foodOrders) {
+            amount += food.price;
+            System.out.printf("%-10s%-10s%-10s%n", foodItems[food.itemNo - 1], food.quantity, food.price);
         }
-        System.out.println("\nTotal Amount- "+amount);
+
+        System.out.println("\nTotal Amount: " + amount);
     }
-    
-    static void deallocate(int rn,int rtype)
-    {
-        int j;
-        char w;
-        switch (rtype) {
-            case 1:               
-                if(hotel_ob.luxury_doublerrom[rn]!=null)
-                    System.out.println("Room used by "+hotel_ob.luxury_doublerrom[rn].name);                
-                else 
-                {    
-                    System.out.println("Empty Already");
-                        return;
-                }
-                System.out.println("Do you want to checkout ?(y/n)");
-                 w=sc.next().charAt(0);
-                if(w=='y'||w=='Y')
-                {
-                    bill(rn,rtype);
-                    hotel_ob.luxury_doublerrom[rn]=null;
-                    System.out.println("Deallocated succesfully");
+
+    static void deallocateRoom(int roomIndex, int roomType) {
+        char confirm;
+        switch (roomType) {
+            case 1:
+                if (hotelData.luxuryDoubleRooms[roomIndex] != null) {
+                    System.out.println("Room used by " + hotelData.luxuryDoubleRooms[roomIndex].name);
+                } else {
+                    System.out.println("Room is already empty");
+                    return;
                 }
-                
                 break;
             case 2:
-                if(hotel_ob.deluxe_doublerrom[rn]!=null)
-                    System.out.println("Room used by "+hotel_ob.deluxe_doublerrom[rn].name);                
-                else 
-                {    
-                    System.out.println("Empty Already");
-                        return;
-                }
-                System.out.println(" Do you want to checkout ?(y/n)");
-                 w=sc.next().charAt(0);
-                if(w=='y'||w=='Y')
-                {
-                    bill(rn,rtype);
-                    hotel_ob.deluxe_doublerrom[rn]=null;
-                    System.out.println("Deallocated succesfully");
+                if (hotelData.deluxeDoubleRooms[roomIndex] != null) {
+                    System.out.println("Room used by " + hotelData.deluxeDoubleRooms[roomIndex].name);
+                } else {
+                    System.out.println("Room is already empty");
+                    return;
                 }
-                 
                 break;
             case 3:
-                if(hotel_ob.luxury_singleerrom[rn]!=null)
-                    System.out.println("Room used by "+hotel_ob.luxury_singleerrom[rn].name);                
-                else 
-                 {    
-                    System.out.println("Empty Already");
-                        return;
-                }
-                System.out.println(" Do you want to checkout ? (y/n)");
-                w=sc.next().charAt(0);
-                if(w=='y'||w=='Y')
-                {
-                    bill(rn,rtype);
-                    hotel_ob.luxury_singleerrom[rn]=null;
-                    System.out.println("Deallocated succesfully");
+                if (hotelData.luxurySingleRooms[roomIndex] != null) {
+                    System.out.println("Room used by " + hotelData.luxurySingleRooms[roomIndex].name);
+                } else {
+                    System.out.println("Room is already empty");
+                    return;
                 }
-                
                 break;
             case 4:
-                if(hotel_ob.deluxe_singleerrom[rn]!=null)
-                    System.out.println("Room used by "+hotel_ob.deluxe_singleerrom[rn].name);                
-                else 
-                 {    
-                    System.out.println("Empty Already");
-                        return;
-                }
-                System.out.println(" Do you want to checkout ? (y/n)");
-                 w=sc.next().charAt(0);
-                if(w=='y'||w=='Y')
-                {
-                    bill(rn,rtype);
-                    hotel_ob.deluxe_singleerrom[rn]=null;
-                    System.out.println("Deallocated succesfully");
+                if (hotelData.deluxeSingleRooms[roomIndex] != null) {
+                    System.out.println("Room used by " + hotelData.deluxeSingleRooms[roomIndex].name);
+                } else {
+                    System.out.println("Room is already empty");
+                    return;
                 }
                 break;
-            default:
-                System.out.println("\nEnter valid option : ");
-                break;
+            default: System.out.println("Invalid room type"); return;
         }
-    }
-    
-    static void order(int rn,int rtype)
-    {
-        int i,q;
-        char wish;
-         try{
-             System.out.println("\n==========\n   Menu:  \n==========\n\n1.Sandwich\tRs.50\n2.Pasta\t\tRs.60\n3.Noodles\tRs.70\n4.Coke\t\tRs.30\n");
-        do
-        {
-            i = sc.nextInt();
-            System.out.print("Quantity- ");
-            q=sc.nextInt();
-           
-              switch(rtype){
-            case 1: hotel_ob.luxury_doublerrom[rn].food.add(new Food(i,q));
-                break;
-            case 2: hotel_ob.deluxe_doublerrom[rn].food.add(new Food(i,q));
-                break;
-            case 3: hotel_ob.luxury_singleerrom[rn].food.add(new Food(i,q));
-                break;
-            case 4: hotel_ob.deluxe_singleerrom[rn].food.add(new Food(i,q));
-                break;                                                 
-        }
-              System.out.println("Do you want to order anything else ? (y/n)");
-              wish=sc.next().charAt(0); 
-        }while(wish=='y'||wish=='Y');  
-        }
-         catch(NullPointerException e)
-            {
-                System.out.println("\nRoom not booked");
-            }
-         catch(Exception e)
-         {
-             System.out.println("Cannot be done");
-         }
-    }
-}
-
 
-class write implements Runnable
-{
-    holder hotel_ob;
-    write(holder hotel_ob)
-    {
-        this.hotel_ob=hotel_ob;
-    }
-    @Override
-    public void run() {
-          try{
-        FileOutputStream fout=new FileOutputStream("backup");
-        ObjectOutputStream oos=new ObjectOutputStream(fout);
-        oos.writeObject(hotel_ob);
+        System.out.println("Do you want to free this room? (y/n): ");
+        confirm = scanner.next().charAt(0);
+        if (confirm == 'y') {
+            switch (roomType) {
+                case 1: hotelData.luxuryDoubleRooms[roomIndex] = null; break;
+                case 2: hotelData.deluxeDoubleRooms[roomIndex] = null; break;
+                case 3: hotelData.luxurySingleRooms[roomIndex] = null; break;
+                case 4: hotelData.deluxeSingleRooms[roomIndex] = null; break;
+            }
+            System.out.println("Room deallocated successfully!");
+        } else {
+            System.out.println("Operation cancelled.");
         }
-        catch(Exception e)
-        {
-            System.out.println("Error in writing "+e);
-        }         
-        
     }
-    
-}
 
-public class Main {
-    public static void main(String[] args){
-        
-        try
-        {           
-        File f = new File("backup");
-        if(f.exists())
-        {
-            FileInputStream fin=new FileInputStream(f);
-            ObjectInputStream ois=new ObjectInputStream(fin);
-            Hotel.hotel_ob=(holder)ois.readObject();
-        }
-        Scanner sc = new Scanner(System.in);
-        int ch,ch2;
-        char wish;
-        x:
-        do{
+    public static void main(String[] args) {
+        int choice;
+        while (true) {
+            System.out.println("1. Book Room");
+            System.out.println("2. Check Availability");
+            System.out.println("3. Generate Bill");
+            System.out.println("4. Deallocate Room");
+            System.out.println("5. Exit");
+            System.out.print("Enter your choice: ");
+            choice = scanner.nextInt();
 
-        System.out.println("\nEnter your choice :\n1.Display room details\n2.Display room availability \n3.Book\n4.Order food\n5.Checkout\n6.Exit\n");
-        ch = sc.nextInt();
-        switch(ch){
-            case 1: System.out.println("\nChoose room type :\n1.Luxury Double Room \n2.Deluxe Double Room \n3.Luxury Single Room \n4.Deluxe Single Room\n");
-                    ch2 = sc.nextInt();
-                    Hotel.features(ch2);
-                break;
-            case 2:System.out.println("\nChoose room type :\n1.Luxury Double Room \n2.Deluxe Double Room \n3.Luxury Single Room\n4.Deluxe Single Room\n");
-                     ch2 = sc.nextInt();
-                     Hotel.availability(ch2);
-                break;
-            case 3:System.out.println("\nChoose room type :\n1.Luxury Double Room \n2.Deluxe Double Room \n3.Luxury Single Room\n4.Deluxe Single Room\n");
-                     ch2 = sc.nextInt();
-                     Hotel.bookroom(ch2);                     
-                break;
-            case 4:
-                 System.out.print("Room Number -");
-                     ch2 = sc.nextInt();
-                     if(ch2>60)
-                         System.out.println("Room doesn't exist");
-                     else if(ch2>40)
-                         Hotel.order(ch2-41,4);
-                     else if(ch2>30)
-                         Hotel.order(ch2-31,3);
-                     else if(ch2>10)
-                         Hotel.order(ch2-11,2);
-                     else if(ch2>0)
-                         Hotel.order(ch2-1,1);
-                     else
-                         System.out.println("Room doesn't exist");
-                     break;
-            case 5:                 
-                System.out.print("Room Number -");
-                     ch2 = sc.nextInt();
-                     if(ch2>60)
-                         System.out.println("Room doesn't exist");
-                     else if(ch2>40)
-                         Hotel.deallocate(ch2-41,4);
-                     else if(ch2>30)
-                         Hotel.deallocate(ch2-31,3);
-                     else if(ch2>10)
-                         Hotel.deallocate(ch2-11,2);
-                     else if(ch2>0)
-                         Hotel.deallocate(ch2-1,1);
-                     else
-                         System.out.println("Room doesn't exist");
-                     break;
-            case 6:break x;
-                
-        }
-           
-            System.out.println("\nContinue : (y/n)");
-            wish=sc.next().charAt(0); 
-            if(!(wish=='y'||wish=='Y'||wish=='n'||wish=='N'))
-            {
-                System.out.println("Invalid Option");
-                System.out.println("\nContinue : (y/n)");
-                wish=sc.next().charAt(0); 
-            }
-            
-        }while(wish=='y'||wish=='Y');    
-        
-        Thread t=new Thread(new write(Hotel.hotel_ob));
-        t.start();
-        }        
-            catch(Exception e)
-            {
-                System.out.println("Not a valid input");
+            switch (choice) {
+                case 1:
+                    System.out.println("Select room type: \n1. Luxury Double Room\n2. Deluxe Double Room\n3. Luxury Single Room\n4. Deluxe Single Room");
+                    int roomType = scanner.nextInt();
+                    displayFeatures(roomType);
+                    bookRoom(roomType);
+                    break;
+                case 2:
+                    System.out.println("Select room type: \n1. Luxury Double Room\n2. Deluxe Double Room\n3. Luxury Single Room\n4. Deluxe Single Room");
+                    roomType = scanner.nextInt();
+                    checkAvailability(roomType);
+                    break;
+                case 3:
+                    System.out.println("Select room type: \n1. Luxury Double Room\n2. Deluxe Double Room\n3. Luxury Single Room\n4. Deluxe Single Room");
+                    roomType = scanner.nextInt();
+                    System.out.print("Enter room number: ");
+                    int roomIndex = scanner.nextInt();
+                    generateBill(roomIndex, roomType);
+                    break;
+                case 4:
+                    System.out.println("Select room type: \n1. Luxury Double Room\n2. Deluxe Double Room\n3. Luxury Single Room\n4. Deluxe Single Room");
+                    roomType = scanner.nextInt();
+                    System.out.print("Enter room number: ");
+                    roomIndex = scanner.nextInt();
+                    deallocateRoom(roomIndex, roomType);
+                    break;
+                case 5:
+                    System.out.println("Exiting the application.");
+                    scanner.close();
+                    return;
+                default:
+                    System.out.println("Invalid choice, please try again.");
+                    break;
             }
+        }
     }
 }