Question

In this lab you will work with abstract classes/interfaces. (Java Program)

You will be implementing a basic employee schema within a company. The Employee class will be an abstract class that will contain methods applicable to all employees. You will then create 2 classes called SoftwareEngineer and ProductManager. Both are different employee types based on occupation. You will create an interface called Developer which will consist of specific methods that apply to only Developers (e.g. SoftwareEngineer class will implement this, we will assume all of them in this company are developers only).

Extend both the SoftwareEngineer and ProductManager class from the Employee class.

NOTE: When creating your classes be sure to use all of the proper security measures to prevent direct access by the user (e.g. Select the right access modifier)

1. Create a abstract class called Employee, inside here include the following abstract methods:

a. void conductWork() – accepts no parameters

2. Create a interface called Developer, inside here include the following methods:

a. public void createComponent()

b. public void createAPI()

c. public void performTesting()

3. Create a class called SoftwareEngineer and include the following variables/methods:

a. Variables: Format is variableName : dataType

i. Salary: double

ii. Name: String

iii. Age: int

iv. startDate : String

v. gradeLevel: char (a letter from A – E)

b. 2 constructors:

i. Empty constructor that simply prints “New software engineer added”

ii. Parameterized constructor – accept all of the data above and initialize the values and then prints “New software engineer added with grade level: “ and print the grade level passed in.

c. Implement the 3 methods from the interface, they will only print the following:

i. createComponent() – “Build component…”

ii. createAPI() – “Creating API architecture and implementation…”

iii. performTesting() – “Testing created modules…”

d. Implement setter/getter methods for all of the data fields

e. Implement the abstract method conductWork() – this will print “I am coding…”

4. Create a class called ProductManager and include the following variables/methods:

a. Variables:

i. employees: int

b. 2 constructors:

i. Empty constructor that simply prints “New software engineer added”

ii. Parameterized constructor – accept the int as an input and initialize the employees variable

c. Implement setter/getter for the variable

d. Implement abstract method conductWork() – this will print “Managing upcoming product release…”

Your main method will be empty, you won’t be running any code just writing the class definitions.

Answer 1

PROGRAM CODE

// Employee class
abstract class Employee {

// All abstract methods required
abstract void conductWork();
}

// Developer Interface

interface Developer {

public void createComponent();
public void createAPI();
public void performTesting();
}

// SoftwareEngineer class

class SoftwareEngineer extends Employee implements Developer{

// Member variables

private double Salary;
private String Name;
private int Age;
private String startDate;
private char gradeLevel;

// 2 Constructors

public SoftwareEngineer() {

System.out.println("New software engineer added");
}

// A constructor which initializes all of the above fields

public SoftwareEngineer(double salary, String name, int age, String startDate, char gradeLevel) {
Salary = salary;
Name = name;
Age = age;
this.startDate = startDate;
this.gradeLevel = gradeLevel;

System.out.println("New software engineer added with grade level: " + gradeLevel);
}

@Override
public void createComponent() {
System.out.println("Build component...");
}

@Override
public void createAPI() {
System.out.println("Creating API architecture and implementation...");
}

@Override
public void performTesting() {
System.out.println("Testing created modules...");
}

@Override
void conductWork() {
System.out.println("I am coding...");
}

// Implementing setters and getters

public double getSalary() {
return Salary;
}

public void setSalary(double salary) {
Salary = salary;
}

public String getName() {
return Name;
}

public void setName(String name) {
Name = name;
}

public int getAge() {
return Age;
}

public void setAge(int age) {
Age = age;
}

public String getStartDate() {
return startDate;
}

public void setStartDate(String startDate) {
this.startDate = startDate;
}

public char getGradeLevel() {
return gradeLevel;
}

public void setGradeLevel(char gradeLevel) {
this.gradeLevel = gradeLevel;
}
}

// ProductManager Class

class ProductManager extends Employee {

private int employees;

// Constructors

public ProductManager() {
System.out.println("New product manager added");
}

public ProductManager(int employees) {
this.employees = employees;
}

// Setters and getters

public int getEmployees() {
return employees;
}

public void setEmployees(int employees) {
this.employees = employees;
}

@Override
void conductWork() {
System.out.println("Managing upcoming product release...");
}
}

// Test class which contain main method

public class Test {

// As it is said main method will be empty

public static void main(String[] args) {
  
}
}

SAMPLE OUTPUT

Test X "C:\Program Files\Java\jdk1.8.0_111\bin\java.exe" Process finished with exit code 0

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