Question

Please fill in the remaining code necessary and follow the instructions below this is an abstract class; it represents an department in the company. This class cannot be instantiated (objects created), but it serves as the parent for other classes.

Department – This class represents a department within the company.

1. Provide the implementation (the body) for the following methods:

public int getDepartmentID())

public String getDepartmentName())

public Manager getManager())

2. Fix the implementation for the following method– substitute “blah” with the actual value:

public String toString()

3. Provide the implementation (the body) for the following methods:

public String getManagerName()

public void setDepartmentName(String name)

public void setDepartmentManager(Manager deptManager)

public void addEmployee(Employee employee)

package payrollsystem_phase1;

import java.util.ArrayList;

/**
* The Department class represents a department within a company. Departments have a
* list of employees and a manager.
*
*/
public class Department
{
// static variable
private static int nextDeptID = 1;
  
// instance variables
private int departmentID;
private String departmentName;
private Manager departmentManager;
private ArrayList listOfEmployees = new ArrayList<>();
  
  
/**
* This is the default constructor. It initializes the fields to default values.   
*/
public Department()
{
departmentID = nextDeptID;
departmentName = "";
departmentManager = new Manager();
  
nextDeptID++;
}
  
  
/**
* This constructor sets the department's id, name, and manager.   
* @param name Department's name.
* @param manager Department's manager.
*/
public Department(String name, Manager manager)
{
departmentID = nextDeptID;
departmentName = name;
departmentManager = manager;
  
nextDeptID++;
}
  
  
/**
* The getDepartmentID method returns the department's id number.
* @return The department's id.
*/
public int getDepartmentID()
{
// provide implementation
}
  
  
/**
* The getDepartmentName method returns the department's name.
* @return The department's name.
*/
public String getDepartmentName()
{
// provide implementation
}
  
  
/**
* The getManager method returns a reference to the department manager.
* @return The department manager.
*/
public Manager getManager()
{
// provide implementation
}
  
  
/**
* The getManagerName method returns the department manager's first and last name.
* @return The department manager's first and last name separated by a space.
*/
public String getManagerName()
{
// provide implementation
}
  
  
/**
* The setDepartmentName method sets the name for this department.
* @param name The value to store in the name field for this department.
*/
public void setDepartmentName(String name)
{
// provide implementation
}
  
  
/**
* The setDepartmentManager method sets the manager for this department.
* @param deptManager The value to store in the manager field for this department.
*/
public void setDepartmentManager(Manager deptManager)
{
// provide implementation
}
  
  
/**
* The addEmployee method adds an employee to the list of employees for this department.
* @param employee The employee to be added.
*/
public void addEmployee(Employee employee)
{
// provide implementation
}
  
  
/**
* The toString method returns a string containing the department's data.
* @return A String containing the Department's information: id, name,
* manager, and list of employees.
*/
@Override
public String toString()
{
String managerInfo;
  
if( departmentManager != null )
managerInfo = "blah";
else
managerInfo = "None";
  
  
String output = String.format( "\n%-30s %s \n%-30s %s \n%-30s %s \n%-30s %-10s %-15s %s",
"Department ID:", "blah",
"Department Name:", "blah",
"Department Manager:", managerInfo,
"List of Employees:", "ID", "FIRST NAME", "LAST NAME");
  
if( listOfEmployees == null || listOfEmployees.isEmpty() )
{
output += "None";
}
else
{
for( Employee emp : listOfEmployees )
{
output += String.format( "\n%-30s %-10s %-15s %s",
"",
emp.getEmployeeID(),
"blah",
"blah");
}
}

return output;
}
  
}

Answer 1

import java.util.ArrayList;

class Manager {
   private String firstName;
   private String LastName;

   public String getFirstName() {
       return firstName;
   }

   public void setFirstName(String firstName) {
       this.firstName = firstName;
   }

   public String getLastName() {
       return LastName;
   }

   public void setLastName(String lastName) {
       LastName = lastName;
   }
}

class Employee {
   private int employeeID;
   private String FirstName;
   private String LastName;

   public int getEmployeeID() {
       return employeeID;
   }

   public void setEmployeeID(int employeeID) {
       this.employeeID = employeeID;
   }

   public String getFirstName() {
       return FirstName;
   }

   public void setFirstName(String firstName) {
       FirstName = firstName;
   }

   public String getLastName() {
       return LastName;
   }

   public void setLastName(String lastName) {
       LastName = lastName;
   }
}

/**
* The Department class represents a department within a company. Departments
* have a list of employees and a manager.
*
*/
public class Department {
// static variable
   private static int nextDeptID = 1;

   // instance variables
   private int departmentID;
   private String departmentName;
   private Manager departmentManager;
   private ArrayList<Employee> listOfEmployees = new ArrayList<>();

   /**
   * This is the default constructor. It initializes the fields to default values.
   */
   public Department() {
       departmentID = nextDeptID;
       setDepartmentName("");
       setDepartmentManager(new Manager());

       nextDeptID++;
   }

   /**
   * This constructor sets the department's id, name, and manager.
   *
   * @param name    Department's name.
   * @param manager Department's manager.
   */
   public Department(String name, Manager manager) {
       departmentID = nextDeptID;
       setDepartmentName(name);
       setDepartmentManager(manager);

       nextDeptID++;
   }

   /**
   * The getDepartmentID method returns the department's id number.
   *
   * @return The department's id.
   */
   public int getDepartmentID() {
       return departmentID;
   }

   /**
   * The getDepartmentName method returns the department's name.
   *
   * @return The department's name.
   */
   public String getDepartmentName() {
       return departmentName;
   }

   /**
   * The getManager method returns a reference to the department manager.
   *
   * @return The department manager.
   */
   public Manager getManager() {
       return departmentManager;
   }

   /**
   * The getManagerName method returns the department manager's first and last
   * name.
   *
   * @return The department manager's first and last name separated by a space.
   */
   public String getManagerName() {
       return departmentManager.getFirstName() + " " + departmentManager.getLastName();
   }

   /**
   * The setDepartmentName method sets the name for this department.
   *
   * @param name The value to store in the name field for this department.
   */
   public void setDepartmentName(String departmentName) {
       this.departmentName = departmentName;
   }

   /**
   * The setDepartmentManager method sets the manager for this department.
   *
   * @param deptManager The value to store in the manager field for this
   *                    department.
   */
   public void setDepartmentManager(Manager departmentManager) {
       this.departmentManager = departmentManager;
   }

   /**
   * The addEmployee method adds an employee to the list of employees for this
   * department.
   *
   * @param employee The employee to be added.
   */
   public void addEmployee(Employee employee) {
       listOfEmployees.add(employee);
   }

   /**
   * The toString method returns a string containing the department's data.
   *
   * @return A String containing the Department's information: id, name, manager,
   *         and list of employees.
   */
   @Override
   public String toString() {
       String managerInfo;

       if (departmentManager != null)
           managerInfo = getManagerName();
       else
           managerInfo = "None";

       String output = String.format("\n%-30s %s \n%-30s %s \n%-30s %s \n%-30s %-10s %-15s %s", "Department ID:",
               getDepartmentID(), "Department Name:", getDepartmentName(), "Department Manager:", managerInfo,
               "List of Employees:", "ID", "FIRST NAME", "LAST NAME");

       if (listOfEmployees == null || listOfEmployees.isEmpty()) {
           output += "None";
       } else {
           for (Employee emp : listOfEmployees) {
               output += String.format("\n%-30s %-10s %-15s %s", "", emp.getEmployeeID(), emp.getFirstName(),
                       emp.getLastName());
           }
       }

       return output;
   }

}