Question

I want to write this program in java.

Write a simple airline ticket reservation program in java.The program should display a menu with the following options: reserve a ticket, cancel a reservation, check whether a ticket is reserved for a particular person, and display the passengers. The information is maintained on an alphabetized linked list of names. In a simpler version of the program, assume that tickets are reserved for only one flight. In a fuller version, place no limit on the number of flights. Create a linked list of flights with each node including a pointer to a linked list of passengers.

Answer 1

package elastic5.elastic5;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.IOException;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

import elastic5.elastic5.ttt.Console;

public class AirlineRes extends JFrame {
   static final int MAX_SEATS = 8;
   String[] seats = new String[MAX_SEATS];
public AirlineRes() {

initUI();
}

private void initUI() {
  
createMenuBar();

setTitle("airline ticket reservation");
setSize(300, 200);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}

private void createMenuBar() {

JMenuBar menubar = new JMenuBar();
ImageIcon icon = new ImageIcon("exit.png");

JMenu file = new JMenu("File");
file.setMnemonic(KeyEvent.VK_F);

JMenuItem eMenuItem = new JMenuItem("Exit", icon);
eMenuItem.setMnemonic(KeyEvent.VK_E);
eMenuItem.setToolTipText("Exit application");
eMenuItem.addActionListener((ActionEvent event) -> {
System.exit(0);
});

file.add(eMenuItem);
  
//reserve a ticket, cancel a reservation, check whether a ticket is reserved for a particular person, and display the passengers
JMenuItem eMenuItem1 = new JMenuItem("Reserve Ticket", icon);
eMenuItem1.setMnemonic(KeyEvent.VK_E);
eMenuItem1.setToolTipText("Book Ticket");
eMenuItem1.addActionListener((ActionEvent event) -> {
   String[] seats = new String[MAX_SEATS]; // the passenger list
initializeSeats(seats);
   makeReservation(seats);
System.out.println("book ticket");
});

file.add(eMenuItem1);

JMenuItem eMenuItem2 = new JMenuItem("cancel a reservation", icon);
eMenuItem2.setMnemonic(KeyEvent.VK_E);
eMenuItem2.setToolTipText("cancel a reservation");
eMenuItem2.addActionListener((ActionEvent event) -> {
  
   try {
       String[] seats = new String[MAX_SEATS]; // the passenger list
initializeSeats(seats);
               cancelReservation(seats);
              
           } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }
System.out.println("cancel a reservation");
});

file.add(eMenuItem2);
  
JMenuItem eMenuItem3 = new JMenuItem("check whether a ticket is reserved for a particular person", icon);
eMenuItem3.setMnemonic(KeyEvent.VK_E);
eMenuItem3.setToolTipText("check whether a ticket is reserved for a particular person");
eMenuItem3.addActionListener((ActionEvent event) -> {
System.out.println("check whether a ticket is reserved for a particular person");
});

file.add(eMenuItem3);
  
JMenuItem eMenuItem4 = new JMenuItem("display the passengers", icon);
eMenuItem4.setMnemonic(KeyEvent.VK_E);
eMenuItem4.setToolTipText("display the passengers");
eMenuItem4.addActionListener((ActionEvent event) -> {
System.out.println("display the passengers");
});

file.add(eMenuItem4);
  
menubar.add(file);

setJMenuBar(menubar);
}

  
  
static void initializeSeats(String[] seats) {
for (int i = 0; i < seats.length; i++) {
seats[i] = "";
}
}
  
/**
* Make a reservation
*/
void makeReservation(String[] seats) {
int seatIndex = findEmptySeat(seats); // index of first empty seat
if (seatIndex == seats.length) {
System.out.println("All seats are full. Sorry.");
} else {
String name = getPassengerName(); // passenger's name
seats[seatIndex] = name;
System.out.println(name + " has been assigned seat #" + (seatIndex+1));
}
}
/**
* Find the index of the first empty seat on the plane.
* If there are no empty seats, return seats.length
*/
int findEmptySeat(String[] seats) {
for (int i = 0; i < seats.length; i++) {
if (isEmpty(seats, i)) {
return i;
}
}

return seats.length;
}
boolean isEmpty(String[] seats, int seatIndex) {
return seats[seatIndex].equals("");
}
  
/**
* Cancel a reservation
* @throws IOException
* @throws NumberFormatException
*/
void cancelReservation(String[] seats) throws NumberFormatException, IOException {
int seatIndex = getSeatToCancel(); // index of seat to cancel reservation for
if (isEmpty(seats, seatIndex)) {
System.out.println("Seat #" + (seatIndex+1) + " has not been reserved for anyone");
} else {
seats[seatIndex] = "";
System.out.println("Seat #" + (seatIndex+1) + " is now available");
}
}
  
  
int readInt() throws NumberFormatException, IOException {
int i = 0;

boolean valid = false;
i=2;
// i = Integer.parseInt(in.readLine());
valid = true;

System.out.print("ttt");

return i;
}

int getSeatToCancel() throws NumberFormatException, IOException {
boolean valid = false; // is the seat number valid?
int seat; // seat number to cancel

do {
System.out.print("Enter the seat to cancel: ");
seat = readInt();
if (1 <= seat && seat <= MAX_SEATS) {
valid = true;
} else {
System.out.println("Invalid seat number");
}
} while (!valid);

return seat-1;
}
  
String getPassengerName() {
System.out.print("Enter the passenger's name: ");
return "Parmesh dayal";
}
  
public static void main(String[] args) {
   boolean done = false;
     
String[] seats = new String[MAX_SEATS]; // the passenger list
initializeSeats(seats);
EventQueue.invokeLater(() -> {
AirlineRes ex = new AirlineRes();
ex.setVisible(true);
});
}}