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Midterm Paired Task 1

Object Oriented Analysis and Design

Problem Statement

Tiny Hospital keeps information on patients and hospital rooms. The system assigns each patient a unique ID number. In addition, the patient’s name and date of birth are recorded. Some patients are resident patients (they spend at least one night in the hospital), while others are outpatients (they are treated and released).

Resident patients are assigned to a room. Each room is identified by a room number, type (private or semi-private), and fee. Over time, each room will have many patients who stay in it. Each resident patient will stay in only one room. The hospital system can view patient information and check whether a room is occupied or not. Both patient and room entities allow adding, updating, and searching records.

Step 1. Identify Objects

Step 2. Identify Properties and Methods

Objects with their properties and behaviors:

Patient

Resident Patient

OutPatient

Hospital Room

Hospital Flow

Step 3. Design the Model

Class Diagram (created using draw.io):

Class Diagram

Step 4. Implement the Classes

Java class implementation and methods codes:

Patient Class


class Patient {
    int patientID;
    String name;
    Date dateOfBirth;
    String patientType;

    public Patient(int patientID, String name, Date dateOfBirth, String patientType) {
        this.patientID = patientID;
        this.name = name;
        this.dateOfBirth = dateOfBirth;
        this.patientType = patientType;
    }

    public void updatePatient(String name, Date dob) {
        this.name = name;
        this.dateOfBirth = dob;
    }

    public String getPatientInfo() {
        return "ID: " + patientID + ", Name: " + name + ", DOB: " + dateOfBirth + ", Type: " + patientType;
    }
}

HosRoom Class


class HosRoom {
    int roomNumber;
    String roomType;
    double roomFee;
    boolean occupied = false;

    public HosRoom(int roomNumber, String roomType, double roomFee) {
        this.roomNumber = roomNumber;
        this.roomType = roomType;
        this.roomFee = roomFee;
    }

    public void assignPatient(Patient p) {
        occupied = true;
        System.out.println("Room " + roomNumber + " assigned to patient " + p.name);
    }

    public void releasePatient() {
        occupied = false;
        System.out.println("Room " + roomNumber + " is now available.");
    }

    public boolean isOccupied() {
        return occupied;
    }
}

ResPatient Class (Extends Patient)


class ResPatient extends Patient {
    int roomPatient;

    public ResPatient(int patientID, String name, Date dob, int roomPatient) {
        super(patientID, name, dob, "Resident");
        this.roomPatient = roomPatient;
    }

    public void assignRoom(HosRoom room) {
        this.roomPatient = room.roomNumber;
        room.assignPatient(this);
    }
}

OutPatient Class (Extends Patient)


class OutPatient extends Patient {
    public OutPatient(int patientID, String name, Date dob) {
        super(patientID, name, dob, "Outpatient");
    }

    public void discharge() {
        System.out.println(name + " has been discharged.");
    }
}

HosFlow Class


class HosFlow {
    List patients = new ArrayList<>();
    List rooms = new ArrayList<>();

    public void addPatient(Patient p) {
        patients.add(p);
    }

    public void updatePatient(int id, String newName, Date newDob) {
        for (Patient p : patients) {
            if (p.patientID == id) {
                p.updatePatient(newName, newDob);
                System.out.println("Updated patient " + id);
                return;
            }
        }
        System.out.println("Patient not found.");
    }

    public Patient searchPatient(int id) {
        for (Patient p : patients) {
            if (p.patientID == id) {
                return p;
            }
        }
        return null;
    }

    public void viewPatient(int id) {
        Patient p = searchPatient(id);
        if (p != null) {
            System.out.println(p.getPatientInfo());
        } else {
            System.out.println("Patient not found.");
        }
    }

    public void viewRstat(int roomNumber) {
        for (HosRoom r : rooms) {
            if (r.roomNumber == roomNumber) {
                System.out.println("Room " + r.roomNumber + " occupied: " + r.isOccupied());
                return;
            }
        }
        System.out.println("Room not found.");
    }
}

Main


public static void main(String[] args) {
    HosFlow system = new HosFlow();

    HosRoom room101 = new HosRoom(101, "Private", 1500.0);
    HosRoom room102 = new HosRoom(102, "Semi-Private", 1000.0);
    
    system.rooms.add(room101);
    system.rooms.add(room102);

    ResPatient rp = new ResPatient(1, "Juan Dela Cruz", new Date(), 0);
    OutPatient op = new OutPatient(2, "Maria Clara", new Date());
    
    system.addPatient(rp);
    system.addPatient(op);

    rp.assignRoom(room101); 

    system.viewPatient(1);
    system.viewPatient(2);

    system.viewRstat(101);
    system.viewRstat(102);

    op.discharge();

    room101.releasePatient();
    
    system.viewRstat(101);
}

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View Full Code on GitHub