Professor complitted

src/Employee.java

@@ -4,7 +4,8 @@ public abstract class Employee extends Person {
     protected ArrayList<Statement> statements = new ArrayList<>();
     protected String position;
     protected double basicIncome;
-    public Employee (String position){
+    public Employee (String firstName , String lastName , String id , int joiningYear , Department department , String position){
+        super(firstName , lastName , id , joiningYear , department);
         this.position = position;
     }
 
@@ -26,4 +27,5 @@ public abstract class Employee extends Person {
     public void addBankStatement (Statement statement){
         this.statements.add(statement);
     }
+    public abstract double getCurrentIncome ();
 }

src/Person.java

@@ -4,6 +4,13 @@ public abstract class Person {
     protected String id;
     protected int joiningYear;
     protected Department department;
+    public Person (String firstName , String lastName , String id , int joiningYear , Department department){
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.id = id;
+        this.joiningYear = joiningYear;
+        this.department = department;
+    }
 
     public String getFullName() {
         return firstName + " " + lastName;

src/Professor.java

+import java.util.ArrayList;
+
+public class Professor extends Employee {
+    private ArrayList<Course> courses = new ArrayList<>();
+    private String group;
+    public Professor(String firstName , String lastName , String id , int joiningYear , Department department , String position , String group){
+        super(firstName , lastName , id , joiningYear , department , position);
+        this.group = group;
+    }
+
+    public ArrayList<Course> getCourses() {
+        return courses;
+    }
+
+    public String getGroup() {
+        return group;
+    }
+    public void addCourse (Course c){
+        courses.add(c);
+    }
+
+    @Override
+    public double getCurrentIncome () {
+        double sum = 0;
+        for (int i = 0; i < this.statements.size(); i++) {
+            sum += this.statements.get(i).getAmount();
+        }
+        return this.basicIncome + sum;
+    }
+
+}

src/ServiceEmployee.java

+public class ServiceEmployee extends Employee {
+    @Override
+    public double getCurrentIncome (){
+        return this.basicIncome;
+    }
+    public ServiceEmployee(String firstName , String lastName , String id , int joiningYear , Department department , String position){
+        super(firstName , lastName , id ,joiningYear , department , position);
+    }
+}