Answer:
Hi Mitutk! Very good question for Java programmers to test knowledge on classes, constructors and mutator methods. Please find the answer with explanation below.
Explanation:
Constructors in Java can be declared with different parameters. Declaring the properties of the Employee object as private, such as the name, id, department and position as in this example, is good design practice as it helps to keep data secure. We can get and set these properties by accessor methods as declared below. The second program can be written a few different ways, try using the set methods for storing the different info instead of the constructors used.
Employee.java
class Employee {
private String employeeName;
private int idNumber;
private String department;
private String position;
public Employee() {
employeeName = "";
idNumber = 0;
department = "";
position = "";
}
public Employee(String name, int id, String dept, String pos) {
employeeName = name;
idNumber = id;
department = dept;
position = pos;
}
public Employee(String name, int id) {
employeeName = name;
idNumber = id;
department = "";
position = "";
}
public void set_employee_name(String empName) {
employeeName = empName;
}
public String get_employee_name() {
return employeeName;
}
public void set_employeeId(int empId) {
idNumber = empId;
}
public int get_employeeId() {
return idNumber;
}
public void set_department(String dept) {
department = dept;
}
public String get_department() {
return department;
}
public void set_position(String pos) {
position = pos;
}
public String get_position() {
return position;
}
}
EmployeeProgram.java
import Employee.java;
public class EmployeeProgram {
public static void main(String args[]) {
Employee emp1 = new Employee("Susan Meyers", 47899, "Accounting", "Vice President");
Employee emp2 = new Employee("Mark Jones", 39119, "IT", "Programmer");
Employee emp3 = new Employee("Joy Rogers", 81774, "Manufacturing", "Engineer");
System.out.println(emp1.get_employee_name());
System.out.println(emp2.get_employee_name());
System.out.println(emp3.get_employee_name());
}
}
