[25 points] Write a Java class named Employee such that the class contains threeattributes empName, salary, and departmentName. You should be able to createobjects of this class by supplying values to any one, two, or all three of the attributes. Ifno value is supplied during the object creation, the attributes should be initialized withsome default values. You are expected to use 'this' keyword to achieve the result. Discussthe ways in which you can change or reset the attribute values of the objects created.Write appropriate mutator methods that store values in these fields and accessormethods that return the values in these fields. Once you have written the class, write aseparate program that creates three Employee objects to hold the following data:Employee Name Department Salary---------------------------------------------------------------------Susan Meyers Accounting 5000.00Mark Jones IT 8375.00Joy Rogers Manufacturing 6380.00---------------------------------------------------------------------The program should store this data in the three objects and then display the data for eachemployee on the screen
Question
[25 points] Write a Java class named Employee such that the class contains threeattributes empName, salary, and departmentName. You should be able to createobjects of this class by supplying values to any one, two, or all three of the attributes. Ifno value is supplied during the object creation, the attributes should be initialized withsome default values. You are expected to use 'this' keyword to achieve the result. Discussthe ways in which you can change or reset the attribute values of the objects created.Write appropriate mutator methods that store values in these fields and accessormethods that return the values in these fields. Once you have written the class, write aseparate program that creates three Employee objects to hold the following data:Employee Name Department Salary---------------------------------------------------------------------Susan Meyers Accounting 5000.00Mark Jones IT 8375.00Joy Rogers Manufacturing 6380.00---------------------------------------------------------------------The program should store this data in the three objects and then display the data for eachemployee on the screen
Solution
Here is the Java code for the Employee class:
public class Employee {
private String empName;
private double salary;
private String departmentName;
// Constructor with no arguments
public Employee() {
this("Default Name", 0.0, "Default Department");
}
// Constructor with one argument
public Employee(String empName) {
this(empName, 0.0, "Default Department");
}
// Constructor with two arguments
public Employee(String empName, double salary) {
this(empName, salary, "Default Department");
}
// Constructor with three arguments
public Employee(String empName, double salary, String departmentName) {
this.empName = empName;
this.salary = salary;
this.departmentName = departmentName;
}
// Mutator methods
public void setEmpName(String empName) {
this.empName = empName;
}
public void setSalary(double salary) {
this.salary = salary;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
// Accessor methods
public String getEmpName() {
return empName;
}
public double getSalary() {
return salary;
}
public String getDepartmentName() {
return departmentName;
}
}
And here is the separate program that creates three Employee objects:
public class Main {
public static void main(String[] args) {
Employee employee1 = new Employee("Susan Meyers", 5000.00, "Accounting");
Employee employee2 = new Employee("Mark Jones", 8375.00, "IT");
Employee employee3 = new Employee("Joy Rogers", 6380.00, "Manufacturing");
System.out.println("Employee Name: " + employee1.getEmpName() + ", Salary: " + employee1.getSalary() + ", Department: " + employee1.getDepartmentName());
System.out.println("Employee Name: " + employee2.getEmpName() + ", Salary: " + employee2.getSalary() + ", Department: " + employee2.getDepartmentName());
System.out.println("Employee Name: " + employee3.getEmpName() + ", Salary: " + employee3.getSalary() + ", Department: " + employee3.getDepartmentName());
}
}
This program will display the data for each employee on the screen.
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