JAVA Attribute of ArrayList<Object> not returning values

Class Hospital

package app;

import java.util.ArrayList;
import app.Department;

public class Hospital {
    String hospitalId;
    String hospitalName;
    int departmentCount;
    ArrayList<Department> departmentList = new ArrayList<Department>();

    public Hospital(String hospitalId, String hospitalName, ArrayList<Department> departmentList, int departmentCount) {
        this.hospitalId = hospitalId;
        this.hospitalName = hospitalName;
        this.departmentList = departmentList;
        this.departmentCount = departmentCount;
    }
    
    public ArrayList<Department> getDepartmentList() {
        System.out.println("Returning " + departmentList.size());
        return departmentList;
    }

}

Class Department

package app;

public class Department {
    String departmentId;
    private String hospitalDeptName;
    String hospitalDeptType;
    String subtypeBitFlag;
    String status;

    public Department(String departmentId, String hospitalDeptName, String hospitalDeptType, String subtypeBitFlag, String status) {
        this.departmentId = departmentId;
        this.hospitalDeptName = hospitalDeptName;
        this.hospitalDeptType = hospitalDeptType;
        this.subtypeBitFlag = subtypeBitFlag;
        this.status = status;
    }
    
    public String getDepartmentName() {
        return hospitalDeptName;
    }
}

I am creating an object Department and storing them in an ArrayList

ArrayList<Department> departmentList = new ArrayList<Department>();
departmentList.add(new Department(departmentId, hospitalDeptName, hospitalDeptType, subtypeBitFlag, status));

I am creating an object Hospital and passing to the constructor the above departmentList as list of Departments

ArrayList<Hospital> hospitalList = new ArrayList<Hospital>();
Hospital hospital = new Hospital(hospitalId, hospitalName, departmentList, departmentList.size());

Looping over the hospital objects and extracting the information

            for (Hospital hospital : hospitalList) {
                System.out.println("The number of departments is: "+hospital.departmentList.size() + " for Hospital: " + hospital.hospitalId );
                
                for (Department department : hospital.departmentList) {
                    System.out.println("Hospital ID: " +hospital.hospitalId + ", Hospital Name: "+ hospital.hospitalName + ", Department Name: " + department.getDepartmentName());
                }
            }

Logs as seen below. I am not able to retrive the department and not even their values. But... I am able to retrieve anything other that ArrayList from the object Hospital. The count 0 proves is as if the object Hospital is not populating the array list of Department

The number of departments is: 0 for Hospital: q
The number of departments is: 0 for Hospital: a
The number of departments is: 0 for Hospital: s
The number of departments is: 0 for Hospital: 1
The number of departments is: 0 for Hospital: 2
The number of departments is: 0 for Hospital: 3