Searching Arrays Using A Loop

[jamielowe1990]

Hi all, im new to all this java stuff so please go easy on me!

Im doing business computing at college, my first assignment is to write a basic ticketing system for an airline company that involves booking a luxury seat, an executive seat and searching for a booked ticket.

I have almost completed it, i have the booking parts working with arrays but I have no idea on how to search the arrays and print out the results.

My code so for is as follows:

import java.util.Scanner;
 
public class TicketSystem
{
 
public static void menu()
 
{
System.out.println("Welcome To CCN Jets");
System.out.println("Please Choose One Of The Following Options By Typing A Number Between 1 & 4 (Inclusive) And Then Pressing The Enter Key");
System.out.println("1 - Book a Luxury Seat");
System.out.println("2 - Book an Executive Seat");
System.out.println("3 - Display Booking Details");
System.out.println("4 - Exit");
}
 
public static void main (String [] args)
 
{
 
Scanner input = new Scanner(System.in);
input.useDelimiter("\n"); //ignores spaces in strings
 
String [] title = new String [10];
String [] firstName = new String [10];
String [] surname = new String [10];
String [] address = new String [10];
String [] postcode = new String [10];
String [] telephoneNumber = new String [10];
 
int details=0;
int bookingReference=100;
int seatNumber=0;
int howMany=10;
int luxuryAvailable=6;
int executiveAvailable=4;
int option;
 
menu();
option = input.nextInt();
 
 
if (option == 1);
 
{
System.out.println("Thank You For Choosing To Book A Luxury Seat");
System.out.println("We Now Need to Take A Few Details From You");
System.out.println("========================================");
 
System.out.println("How Many Tickets Would You Like To Book? ");
howMany = input.nextInt();
 
 
{
if ((howMany < 1 || (howMany > luxuryAvailable)))
System.out.print("There Is Not Enough Tickets Available");
 
else
luxuryAvailable = luxuryAvailable - howMany;
System.out.println("Luxury Seat Tickets Available: " +luxuryAvailable );
 
}
 
 
System.out.println("========================================");
 
System.out.println("Mr/Mrs/Miss/Ms/Dr?");
title[details] = input.next();
 
System.out.println("What Is Your First Name?");
firstName[details] = input.next();
 
System.out.println("What Is Your Surname?");
surname[details] = input.next();
 
System.out.println("What Is Your Address?");
address[details] = input.next();
 
System.out.println("What Is Your Postcode?");
postcode[details] = input.next();
 
System.out.println("What Is Your Phone Number?");
telephoneNumber[details] = input.next();
 
System.out.println("========================================");
System.out.println("Thank You. You Have Successfully Booked A Ticket For A Luxury Seat");
bookingReference ++; //booking reference incremented
System.out.println("Your Booking Reference Is:" +bookingReference); 
 
seatNumber ++;
System.out.println("Your Seat Number Is: " +seatNumber);
 
System.out.println("Your Seat Class Is Luxury");
System.out.println("You Have Booked Your Tickets Under The Name: ");
System.out.println(firstName[details]);
 
System.out.println("========================================");
 
menu();
option = input.nextInt();
 
}
 
if (option == 2);
 
{
System.out.println("Thank You For Choosing To Book An Executive Seat");
System.out.println("We Now Need to Take A Few Details From You");
System.out.println("========================================");
 
 
System.out.println("How Many Tickets Would You Like To Book? ");
howMany = input.nextInt();
 
 
{
if ((howMany < 1 || (howMany > luxuryAvailable)))
System.out.print("There Is Not Enough Tickets Available");
 
else
luxuryAvailable = luxuryAvailable - howMany;
System.out.println("Luxury Seat Tickets Available: " +luxuryAvailable );
 
}
 
System.out.println("========================================");
 
System.out.println("Mr/Mrs/Miss/Ms/Dr?");
title[details] = input.next();
 
System.out.println("What Is Your First Name?");
firstName[details] = input.next();
 
System.out.println("What Is Your Surname?");
surname[details] = input.next();
 
System.out.println("What Is Your Address?");
address[details] = input.next();
 
System.out.println("What Is Your Postcode?");
postcode[details] = input.next();
 
System.out.println("What Is Your Phone Number?");
telephoneNumber[details] = input.next();
 
System.out.println("========================================");
 
System.out.println("Thank You. You Have Successfully Booked A Ticket For An Executive Seat");
bookingReference ++; //booking reference incremented
System.out.println("Your Booking Reference Is:" +bookingReference); 
 
seatNumber ++;
System.out.println("Your Seat Number Is: " +seatNumber);
 
System.out.println("Your Seat Class Is Executive");
System.out.println("You Have Booked Tickets Under The Name: ");
System.out.print(firstName[details]);
 
System.out.println("========================================");
 
menu();
option = input.nextInt();
 
 
}
 
if (option == 3)
 
 
System.out.println("You have Chosen To View Your Booking Details");
System.out.println("Please Enter Your Name To Continue:");
 
 
 
System.out.print(title[details]);
System.out.print(surname[details]);
System.out.print(address[details]);
System.out.print(postcode[details]);
System.out.print(telephoneNumber[details]);
 
if (option == 4)
 
System.out.println("Thank You For Choosing CCN Jets");
System.out.println("Goodbye!");
 
 
 
 
}
 
}

Somebody in my class suggested using classes but i have looked at his and although it is working it is very complicated way of doing it. I know it can be done using a loop but im not quite sure on how to write the code.

Ive included my code as i thought it would help anyone into coming up with a solution to my problem.

Any help would be greatly appreciated!
Thanks in advance, Jamie.

[oceanebelle]

Well, there are lots of things going wrong here.

First, your array will only ever have 1 data in. The one in index 0. That means when someone new books a ticket the old one will get overwritten.

Next the reference Number. The reference number should be the "key" to extract the data here but right now. I don't think it's tied to any record at all.

You could do very well with using a Booking class and then use a HashMap.
A hash map has key and value. the key will be your booking reference number and the value will be the booking object that you instantiate everytime someone registers.

searching a map would just be a matter of getting it, not looping through it.

[oceanebelle]

Also, using classes should not hinder you from using java properly. Arrays are old school.

[oceanebelle]

I'm demostrating here using a class and hashmap.
Very simple. The Bookings class does not have the proper setter and getter class because I didn't want to put too much code. this is just to demostrate things.

import java.util.Map;
import java.util.HashMap;

public class BookingMain {
   static int referenceNos = 100;
   static Map<Integer, Booking> bookings = new HashMap<Integer, Booking>();

    public static void main(String... args){
        // call create booking to create the booking and add to the bookings.
        createBooking();

        // search the bookings given a reference no.
        Booking b = bookings.get(100);
        if(b != null)
        {
            // print the details
            System.out.println(b.title);
            System.out.println(b.firstName);
            System.out.println(b.surName);
        }
        else
        {
            System.out.println("no booking found.");
        }
    }

    private static Booking createBooking(){
        Booking b = new Booking();
        b.title = "title input";
        b.firstName = "first name input";
        b.surName = "surname input";
        b.address = "address input";
        b.postCode = "postcode input";
        b.phoneNumber = "phone number input";
        b.referenceNo = referenceNos++;

        // add the booking into the list of all bookings
        bookings.put(b.referenceNo, b);

        return b;
    }
}

class Booking
{
    String title;
    String firstName;
    String surName;
    String address;
    String postCode;
    String phoneNumber;
    Integer referenceNo;
    String seatNo;
    String seatClass;
}