arrayList

import java.util.ArrayList; // Import ArrayList class

public class Medic {

    public static void main(String[] args) {
        // Create an instance of the Hospital class
        Hospital hosp = new Hospital();
        hosp.setHospitalName("HSA"); // Set the hospital name

        // Create instances of the Doctors class with birthdates and set doctor names
        Doctors doc1 = new Doctors(1980, 12, 1);
        doc1.setDoctorName("Dr.Abu Ali");
        Doctors doc2 = new Doctors(1981, 1, 1);
        doc2.setDoctorName("Dr.Kim Lee");
        Doctors doc3 = new Doctors(1985, 12, 12);
        doc3.setDoctorName("Dr.Nadela A/P Ram");

        // Create an ArrayList to store Doctor objects
        ArrayList<Doctors> doctorList = new ArrayList<>();

        // Add Doctor objects to the ArrayList
        doctorList.add(doc1);
        doctorList.add(doc2);
        doctorList.add(doc3);

        // Set the list of doctors in the Hospital
        hosp.setDoctors(doctorList);

        // Display the size of the doctorList
        System.out.println("Size of list: " + doctorList.size());

        // Display the names of doctors and the hospital they belong to
        System.out.println(hosp.getDoctors() + " are Doctors of " + hosp.getHospName());

        // Remove the doctor at index 1 from the list
        doctorList.remove(1);

        // Display the updated list of doctors
        System.out.println("Display list:" + doctorList);

        // Create new Doctor objects and add them to specific positions in the list
        Doctors newDoc1 = new Doctors(1984, 5, 8);
        newDoc1.setDoctorName("Dr.Badariah");
        doctorList.add(0, newDoc1);

        Doctors newDoc2 = new Doctors(1982, 22, 5);
        newDoc2.setDoctorName("Dr.Zang Yu");
        doctorList.add(3, newDoc2);

        // Display the final list of doctors
        System.out.println("Display list: " + doctorList);

        // Display the names and birthdays of doctors using a loop
        System.out.println("Doctor list and their birthday: ");
        for (Doctors doctor : doctorList) {
            System.out.println(doctor.getDoctorName() + " - " + doctor.getBday());
        }
    }
}

// Hospital class definition
class Hospital {
    private String hospitalName;
    private ArrayList<Doctors> doctors; // ArrayList to store Doctor objects

    // Getter method for hospital name
    public String getHospName() {
        return hospitalName;
    }

    // Setter method for hospital name
    public void setHospitalName(String hospName) {
        hospitalName = hospName;
    }

    // Getter method for the list of doctors
    public ArrayList<Doctors> getDoctors() {
        return doctors;
    }

    // Setter method for the list of doctors
    public void setDoctors(ArrayList<Doctors> doc) {
        doctors = doc;
    }
}

// Doctors class definition
class Doctors {
    private String doctorName;
    private Birthday bday; // Birthday object to store birthdate

    // Constructor for Doctors class
    Doctors(int y, int m, int d) {
        bday = new Birthday(y, m, d); // Create a Birthday object with the given birthdate
    }

    // Getter method for doctor name
    public String getDoctorName() {
        return doctorName;
    }

    // Setter method for doctor name
    public void setDoctorName(String docName) {
        doctorName = docName;
    }

    // toString method to return the doctor name
    public String toString() {
        return doctorName;
    }

    // Getter method for Birthday object
    public Birthday getBday() {
        return bday;
    }
}

// Birthday class definition
class Birthday {
    int year, month, day;

    // Constructor for Birthday class
    Birthday(int y, int m, int d) {
        year = y;
        month = m;
        day = d;
    }

    // toString method to return the formatted birthday
    public String toString() {
        return String.format("%s-%s-%s", year, month, day);
    }
}