Your task is to complete various exercises in IntelliJ, using the Java language (OpenJDK 19),

Module 3 - Advanced collections
The following parts of the assessment covers the content in Module 3.
Part 1 - Lists
The Flight class is missing the ability to store a collection of passengers who travel on a
plane. For this part of the assignment:
1. Using a LinkedList, update the Flight class so that a flight can store a collection of
passengers (i.e. data type Passenger class) who travel on a plane.
In addition to adding a LinkedList, you need to add the following methods to the Flight class
that work with the LinkedList:
1. A method called addPassenger to add a passenger into a flight. This method will also
check if there is an available seat in the flight before inserting a passenger. If there is

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no available seat, the passenger will not be included and a message saying “The
flight is fully booked. No available seat anymore” will be shown to the terminal.
2. A method called removePassenger to remove a passenger from a flight.
3. A method called numberOfPassengers that returns the number of passengers in the
flight.
4. A method called printPassengers that prints the details of all passengers travelling in
the flight (you must use an Iterator or you will get no marks).
5. A method called allPassengers that returns the LinkedList.
Demonstration
In the partOne method in the AssessmentTwo class:
1. Create a new Flight object.
2. Add a minimum of 5 passengers into the flight using the addPassenger method.
3. Remove a passenger using the removePassenger method.
4. Print the number of passengers in the flight to the terminal using the
numberOfPassengers method.
5. Print all passenger details in the flight using the printPassengers method.
Part 2 – Collections Class
At the moment there is no way to sort the passengers who travel in a flight. For this part of
the assignment:
1. Create a class (you can choose the name) that implements the Comparator interface.
When you implement the compare method from the Comparator interface you must
use a minimum of two of the instance variables in your comparison.
2. Now create a method in the Flight class called sortPassengers that sorts the
LinkedList using the sort(List list, Comparator c) method in the Collections class.
Demonstration
In the partTwo method in the AssessmentTwo class:
1. Create a new flight.
2. Add a minimum of 5 passengers into the flight using the addPassengers method.
3. Print all passenger details using the printPassengers method to show the order of
the LinkedList before it is sorted.
4. Sort the LinkedList using the sortPassengers method.
5. Print the passengers again using the printPassengers method to show that the
LinkedList has been sorted.

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Part 3 – HashMap class
The Flight class is also missing the ability to store aircrews who operate the flight and what
their role in the flight is. For this part of the assignment:
1. Using a HashMap, update the Flight class so that a flight can store aircrews (i.e.
Aircrew objects) who operate a flight and their associated role (i.e. a String). The role
should be used as the key and the aircrew object should be used as the value.
In addition to adding a HashMap, you need to add the following methods to the Flight class
that work with the HashMap:
1. A method called addAircrew to add an aircrew and their role to the HashMap.
2. A method called removeAircrew to remove an aircrew and their role from the
HashMap.
3. A method called printAircrew that prints the details (key and all aircrew details) for
all allcrews operate the flight (you cannot just print the HashMap, you must loop
through it or you will get no marks).
Demonstration
In the partThree method in the AssessmentTwo class:
1. Create a new flight.
2. Add a minimum of 5 aircrews into the flight using the addAircrew method.
3. Remove an aircrew member using the removeAircrew method.
4. Print all aircrew details in the flight using the printAircrew method.
Hint
Remember that in a HashMap the key must be unique. You can add a number on the end of
the key to facilitate this. For example:
• One aircrew may have the key Pilot
• One aircrew may have the key Co-Pilot
• One aircrew may have the key FlightAttendantOne
• One aircrew may have the key FlightAttendantTwo
• One aircrew may have the key FlightAttendantThree

Module 4 – Advanced exception handling
The following parts of the assessment covers the content in Module 4.

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Part 4 – Implementing exception handling
At the moment we have not implemented any exception handling in our program. For this
part of the assignment:
1. Where applicable, make sure that your setters confirm that the values they are
writing to your instance variables are valid. If they are not, throw an
IllegalArgumentException and print an appropriate error message.
2. Add any other exception handling that you feel is appropriate to your program.
Demonstration
In the partFour method in the AssessmentTwo class:
1. Create an object and:
a. Pass a valid value to one of your setters that you modified to confirm that it
does not throw an IllegalArgumentException.
b. Pass a non-valid value to one of your setters that you modified to confirm
that it throws an IllegalArgumentException.

Module 5 – Input/output
The following part of the assessment covers the content in Module 5.
An important part of many programs is the ability to back up data to a file then restore it as
needed. In this section of the assignment we will add this ability to our program.
Hint for exporting and importing data
A common way to store data in a file that needs to be imported at a later date is to use
comma separated values (csv).
This means that we store a record on a single line and we separate values using a comma (,).
For example, imagine a passenger has the following information:
• name – Nehemia Sugianto
• PNR – KQKRCR ? (6 letters to identify a passenger uniquely)
• seat – A10 ? (3 digits). If the seat is not assigned, ‘000’ will be the default value
• luggagecapacity – 10kg ? in kg
You could store the passenger in the file on a single line like:
Nehemia Sugianto,KQKRCR, A10,10
When you read the file each line in the file will contain the details for a single passenger.

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You can then use the split() method from the String class to split the line into the individual
values, and then use the values to create a new Student and add it to the LinkedList.
Part 5 – Writing to a file
The Flight class is missing the ability to back up the passengers who travel in a flight and the
aircrews who control the flight. For this part of the assignment:
1. Add a method to the Flight class called exportPassengerManifest.
2. The exportPassengerManifest method should write the details of all of the
passengers that travel in a flight (i.e. stored in the LinkedList) to a file. The details for
each passenger should be written on their own line.
3. You must make sure to add all appropriate exception handling and error messages.
Demonstration
In the partFive method in the AssessmentTwo class:
1. Create a new flight.
2. Add a minimum of 5 passengers into the flight using the addPassenger method.
3. Generate a passenger maniest to a file by calling the exportPassengerManifest
method.
Part 6 – Reading from a file
The Flight class is also missing the ability to restore the passengers who travel in a flight. For
this part of the assignment:
1. Add a method to the Flight class called importPassengerManifest.
2. The importPassengerManifest method should read the file that was created by the
importPassengerManifest method above.
3. When reading the file, you need to add all of the passenger into the flight (i.e. add
them to the LinkedList).
4. You must make sure to add all appropriate exception handling and error messages.
Note: If you cannot add the passengers in the flight (i.e. add them to the LinkedList) you will
still get marks for reading the file.
Demonstration
In the partSix method in the AssessmentTwo class:
1. Create a new flight.
2. Import the file you created in the previous part of the assignment.

3. Print the number of passengers in a flight to the terminal using the
numberOfPassengers method to confirm that the correct number of passengers
were imported.
4. Print all passenger details in the flight using the printPassengers method to confirm
that the details of each passnger were imported correctly.

Module 6 – Concurrency
The following part of the assessment covers the content in Module 6
Part 7 – lock() and unlock() methods
We are using a LinkedList to store the passengers who travel in a flight. However, a
LinkedList is not thread safe. This means that if multiple threads were performing
operations on the passengers travel in a particular flight we could encounter issues. For this
part of the assignment:
1. Use the lock() and unlock() methods to protect any critical sections of code in the
Passenger class that perform any operations on the LinkedList that stores the
passengers who travel in the flight.
2. You must make sure to add all appropriate exception handling and error messages.
Note: You may watch an additional video (see Video 1) on Blackboard that demonstrates
how to use lock() and unlock() methods