Third

src/org/university/core/Account.java

@@ -8,16 +8,4 @@ public class Account {
         this.employee = employee;
         balance = 0;
     }
-
-    public void checkout(double income){
-        balance += income;
-    }
-
-    public Employee getEmployee() {
-        return employee;
-    }
-
-    public double getBalance() {
-        return balance;
-    }
 }

src/org/university/core/AccountInterface.java

+package org.university.core;
+
+public interface AccountInterface {
+    public double checkout();
+
+    public double getBalance();
+
+    public double calCurrentIncome();
+
+    public Person getSender();
+}

src/org/university/core/AccountingManagement.java

@@ -3,7 +3,7 @@ package org.university.core;
 import java.util.ArrayList;
 
 public class AccountingManagement {
-    private ArrayList<Account> accounts;
+    private ArrayList<AccountInterface> accounts;
     private ArrayList<Statement> transactions;
 
     public AccountingManagement() {
@@ -11,16 +11,16 @@ public class AccountingManagement {
         this.transactions = new ArrayList<>();
     }
 
-    public void addAccount(Account account)
-    {
+    public void addAccount(AccountInterface account) {
         this.accounts.add(account);
     }
-    public void settle()
-    {
-        for (int i = 0 ; i < accounts.size(); i++)
-        {
-            accounts.get(i).checkout(accounts.get(i).getEmployee().calCurrentIncome() + accounts.get(i).getEmployee().getBasicIncome());
-            transactions.add(new Statement(accounts.get(i).getEmployee().calCurrentIncome() + accounts.get(i).getEmployee().getBasicIncome() , accounts.get(i).getEmployee()));
+
+    public void settle() {
+        for (int i = 0; i < accounts.size(); i++) {
+            double income = 0;
+            income += accounts.get(i).checkout();
+            income += accounts.get(i).calCurrentIncome();
+            transactions.add(new Statement(income, accounts.get(i).getSender()));
         }
     }
 

src/org/university/core/Course.java

@@ -38,7 +38,7 @@ public class Course {
         return students;
     }
 
-    public void addStudent(Student student){
+    public void addStudent(Student student) {
         this.students.add(student);
     }
 }

src/org/university/core/Employee.java

@@ -7,16 +7,18 @@ public abstract class Employee extends Person {
     protected String position;
     protected double basicIncome;
     protected double requiredIncome;
+    protected double balance;
 
-    public Employee(String firstName, String lastName, String id, int joiningYear, Department department, String position, double basicIncome) {
-        super(firstName, lastName, id, joiningYear, department);
+    public Employee(String firstName, String lastName, String id, int joiningYear, Department department, String position
+            , double basicIncome, int currentYear) {
+        super(firstName, lastName, id, joiningYear, department, currentYear);
         this.position = position;
         this.bankStatements = new ArrayList<>();
         this.basicIncome = basicIncome;
+        this.balance = 0;
     }
 
-    public void addBankStatements(Statement s)
-    {
+    public void addBankStatements(Statement s) {
         this.bankStatements.add(s);
     }
 
@@ -36,6 +38,5 @@ public abstract class Employee extends Person {
         return basicIncome;
     }
 
-    public abstract double calCurrentIncome();
     public abstract Boolean isPromotable();
 }

src/org/university/core/GradStudent.java

@@ -2,15 +2,18 @@ package org.university.core;
 
 import java.util.ArrayList;
 
-public class GradStudent extends Student {
+public class GradStudent extends Student implements AccountInterface{
     private ArrayList<Publication> publications;
     private Professor advisor;
+    private double balance;
+    private double requiredIncome;
+    private double basicIncome;
 
     public GradStudent(String firstName, String lastName, String id, int joiningYear, Department department, ArrayList<Course> courses,  Professor advisor) {
         super(firstName, lastName, id, joiningYear, department, courses);
-        this.publications = publications;
         this.publications = new ArrayList<Publication>();
         this.advisor = advisor;
+        this.balance = 0;
     }
 
     public ArrayList<Publication> getPublications() {
@@ -21,4 +24,37 @@ public class GradStudent extends Student {
     {
         this.publications.add(publication);
     }
+
+    public void setRequiredIncome(double requiredIncome) {
+        this.requiredIncome = requiredIncome;
+    }
+
+    public void setBasicIncome(double basicIncome) {
+        this.basicIncome = basicIncome;
+    }
+
+    @Override
+    public double checkout()
+    {
+        this.balance += requiredIncome;
+        return requiredIncome;
+    }
+    @Override
+    public double getBalance() {
+        return balance;
+    }
+
+    @Override
+    public double calCurrentIncome()
+    {
+        this.balance += basicIncome + publications.size() * 1000;
+        return basicIncome + publications.size() * 1000;
+    }
+
+    @Override
+    public Person getSender()
+    {
+        return this;
+    }
+
 }

src/org/university/core/Person.java

@@ -6,13 +6,15 @@ public class Person {
     protected String id;
     protected int joiningYear;
     protected Department department;
+    protected int currentYear;
 
-    public Person(String firstName, String lastName, String id, int joiningYear, Department department) {
+    public Person(String firstName, String lastName, String id, int joiningYear, Department department, int currentYear) {
         this.firstName = firstName;
         this.lastName = lastName;
         this.id = id;
         this.joiningYear = joiningYear;
         this.department = department;
+        this.currentYear = currentYear;
     }
 
     public String getFirstName() {

src/org/university/core/Professor.java

@@ -2,40 +2,82 @@ package org.university.core;
 
 import java.util.ArrayList;
 
-public class Professor extends Employee{
+public class Professor extends Employee implements AccountInterface {
     private ArrayList<Course> courses;
+    private ArrayList<Publication> publications;
     private String group;
+    private int articles;
 
-    public Professor(String firstName, String lastName, String id, int joiningYear, Department department, String position, double basicIncome, String group) {
-        super(firstName, lastName, id, joiningYear, department, position, basicIncome);
+    public Professor(String firstName, String lastName, String id, int joiningYear, Department department, String position
+            , double basicIncome, String group, int currentYear, int articles) {
+        super(firstName, lastName, id, joiningYear, department, position, basicIncome, currentYear);
         this.group = group;
-        this.courses = new ArrayList<Course>();
+        this.courses = new ArrayList<>();
+        this.publications = new ArrayList<>();
+        this.articles = articles;
     }
 
-    public double getCurrentIncome()
-    {
+    public double getCurrentIncome() {
         return super.basicIncome;
     }
-    public ArrayList<Course> getCourses()
-    {
+
+    public ArrayList<Course> getCourses() {
         return this.courses;
     }
-    public void addCourse(Course course)
-    {
+
+    public ArrayList<Publication> getPublications() {
+        return publications;
+    }
+
+    public void addCourse(Course course) {
         this.courses.add(course);
     }
 
+    public void addPublication(Publication publication) {
+        this.publications.add(publication);
+    }
+
     public String getGroup() {
         return group;
     }
 
-    public double calCurrentIncome()
-    {
+    public int getArticles() {
+        return articles;
+    }
+
+    @Override
+    public double checkout() {
+        this.balance += requiredIncome;
         return requiredIncome;
     }
 
-    public Boolean isPromotable()
-    {
+    @Override
+    public double getBalance() {
+        return balance;
+    }
 
+    @Override
+    public double calCurrentIncome() {
+        this.balance += basicIncome + publications.size() * 1000;
+        return basicIncome + publications.size() * 1000;
+    }
+
+    @Override
+    public double getBasicIncome() {
+        return basicIncome;
+    }
+
+    @Override
+    public Person getSender() {
+        return this;
+    }
+
+    public Boolean isPromotable() {
+        if ( articles - publications.size() == 10)
+        {
+            articles = publications.size();
+            return true;
+        }
+        return false;
     }
 }

src/org/university/core/ServiceEmployee.java

 package org.university.core;
 
-public class ServiceEmployee extends Employee{
-    public ServiceEmployee(String firstName, String lastName, String id, int joiningYear, Department department, String position, double basicIncome) {
-        super(firstName, lastName, id, joiningYear, department, position, basicIncome);
+public class ServiceEmployee extends Employee implements AccountInterface {
+    private int extraDays;
+    private int promotionYear;
+    public ServiceEmployee(String firstName, String lastName, String id, int joiningYear, Department department
+            , int currentYear , String position, double basicIncome, int extraDays, int promotionYear) {
+        super(firstName, lastName, id, joiningYear, department, position, basicIncome, currentYear);
+        this.extraDays = extraDays;
+        this.promotionYear = promotionYear;
     }
-    public double calCurrentIncome()
-    {
+
+    public int getPromotionYear() {
+        return promotionYear;
+    }
+
+    public void setPromotionYear(int promotionYear) {
+        this.promotionYear = promotionYear;
+    }
+
+    public int getExtraDays() {
+        return extraDays;
+    }
+
+    public void setExtraDays(int extraDays) {
+        this.extraDays = extraDays;
+    }
+
+    @Override
+    public double checkout() {
+        this.balance += requiredIncome;
         return requiredIncome;
     }
-    public Boolean isPromotable()
-    {
 
+    @Override
+    public double getBalance() {
+        return balance;
+    }
+
+    @Override
+    public double calCurrentIncome() {
+        this.balance += basicIncome + extraDays * 500;
+        return basicIncome + extraDays * 500;
+    }
+
+    @Override
+    public double getBasicIncome() {
+        return basicIncome;
+    }
+
+    @Override
+    public Person getSender() {
+        return this;
+    }
+
+    public Boolean isPromotable() {
+        if (currentYear - promotionYear == 3) {
+            promotionYear = currentYear;
+            return true;
+        }
+        return false;
     }
 }

src/org/university/core/Statement.java

@@ -2,9 +2,9 @@ package org.university.core;
 
 public class Statement {
     private double amount;
-    Employee reciever;
+    Person reciever;
 
-    public Statement(double amount, Employee reciever) {
+    public Statement(double amount, Person reciever) {
         this.amount = amount;
         this.reciever = reciever;
     }
@@ -13,7 +13,7 @@ public class Statement {
         return amount;
     }
 
-    public Employee getReciever() {
+    public Person getReciever() {
         return reciever;
     }
 
@@ -21,7 +21,7 @@ public class Statement {
         this.amount = amount;
     }
 
-    public void setReciever(Employee reciever) {
+    public void setReciever(Person reciever) {
         this.reciever = reciever;
     }
 }