Assignment 7: Java Collection Framework

Assignment 7 (25 marks)
Focus: Java Collection Framework
In this assignment, you are required to write a menu-driven Java program that allows the user to
add patients to a priority queue, display the next patient (and remove him/her from the queue),
show a list of all patients currently waiting for treatment, and exit the program. The program
should simulate the scheduling of patients in a clinic. Use the attached Patient class provided
along with this assignment.
Your program should schedule patients in the queue according to the emergency of their cases
from 1 to 5 (the higher the value, the higher the priority). If two patients have the same
emergency value, use their order of arrival to set their priority (the lower the order, the higher
the priority). It is up to you to have the Patient class implement either Comparable or
Comparator.
Create a class PatientManager that has an attribute named waitingList of the type
PriorityQueue<Patient> and a public method, start(). When start is called, it
should display the following menu of choices to the user, and then ask the user to enter a choice
from 1 to 4:
Here is a description of each choice:
(1) Ask the user for the patient’s name and the emergency from 1 to 5 (1 = low, and 5 = lifeand-death). Your program should create an instance of Patient using the entered data
and add it to the priority queue. Note that your program should not ask the user for the
value of the patient’s order of arrival. Instead, it should use a counter that is automatically
incremented whenever a patient is added to the queue.
(2) Display the name of the next patient in the priority queue and remove him/her from the
queue.
(3) Display the full list of all patients that are still in the queue.
(4) End the program.
Make sure your PatientManager class is robust. It should not crash when a user enters
invalid value. Instead, it should display an error message followed by an action depending on
the type of error (see the sample run below).
Test your program by instantiating your PatientManager class in a main method and
calling the start method.
Note: Add more helper methods and attributes as needed to the PatientManager class.
Sample run (Read carefully to determine the required response in different situations)


Grading
 15 % for logic explanation
 70 % for proper code structure and logic
 15 % for correct syntax and formatting

Submission Instructions
For this assignment, you need to do the following:
1- Create a Java project of which name consists of your student number followed by the
assignment number, e.g., “1234567_A7”.
2- Create one class for each question and write your answer inside that class. Your classes
should have the same name as the question number (e.g., Q1)
3- After solving all questions, open Windows Explorer (or any other file explorer).
4- Navigate to your Java project folder (can be found inside your Eclipse workspace folder).
5- Locate the “src” folder for this project (the folder that includes the source code for all
questions).
6- Zip the “src” folder and rename the zipped file to match your project name (e.g.,
1234567_A2.zip).
7- Submit the zipped file to Canvas.
Note that you can resubmit an assignment, but the new submission overwrites the old
submission and receives a new timestamp.