first commit

src/core/AbstractEmployee.java

+package core;
+
+import java.util.ArrayList;
+
+public abstract class AbstractEmployee extends Person {
+    protected ArrayList<Statement> statements;
+    protected int defpay;
+    protected int income;
+    public AbstractEmployee(String firstName,String lastName,String Id,int joiningYear,Department department,int defpay,ArrayList<Statement> statements){
+        super(firstName,lastName,Id,joiningYear,department);
+        this.defpay=defpay;
+        this.statements=statements;
+    }
+    public ArrayList<Statement> getStatements(){
+        return this.statements;
+    }
+    public int getDefpay(){
+        return defpay;
+    }
+    public abstract int incomeCalculate();
+    public abstract boolean isPromotable();
+}

src/core/Account.java

+package core;
+
+public class Account {
+    private AbstractEmployee owner;
+    private double credit;
+    public Account(AbstractEmployee owner,double credit){
+        this.credit=credit;
+        this.owner=owner;
+    }
+    public AbstractEmployee getOwner(){
+        return owner;
+    }
+    public void setOwner(AbstractEmployee owner){
+        this.owner=owner;
+    }
+    public double getCredit(){
+        return credit;
+    }
+    public void setCredit(double credit){
+        this.credit=credit;
+    }
+}

src/core/AccountingInterface.java

+package core;
+
+public interface AccountingInterface{
+    public AbstractEmployee callEmployee();
+    public double callCurrentIncome();
+
+}
\ No newline at end of file

src/core/AccountingManagement.java

+package core;
+
+import java.util.ArrayList;
+
+public class AccountingManagement {
+    private ArrayList<Account> accounts;
+    private ArrayList<Statement> statements;
+    public void checkout(AccountingInterface employee){
+        boolean flag=true;
+        for (Account account :
+                accounts) {
+            if (account.getOwner() == employee){
+                double amount=employee.callCurrentIncome();
+                account.setCredit(account.getCredit()+amount);
+                flag=false;
+                Statement s=new Statement(amount,employee.callEmployee());
+                statements.add(s);
+            }
+        }
+        if (flag){
+            double amount=employee.callCurrentIncome();
+            Account account=new Account(employee.callEmployee(),employee.callCurrentIncome());
+            accounts.add(account);
+            Statement s=new Statement(amount,employee.callEmployee());
+            statements.add(s);
+        }
+    }
+}

src/core/Course.java

+package core;
+
+import java.util.ArrayList;
+
+public class Course {
+    private String name;
+    private Professor instructor;
+    private ArrayList<Student> students = new ArrayList<Student>();
+    private GraduateStudent teacherAssistance;
+
+
+    public GraduateStudent getTeacherAssistance() {
+        return teacherAssistance;
+    }
+
+    public void setTeacherAssistance(GraduateStudent teacherAssistance) {
+        this.teacherAssistance = teacherAssistance;
+    }
+
+    public Course(String name, Professor instructor) {
+        this.name = name;
+        this.instructor = instructor;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Professor getInstructor() {
+        return instructor;
+    }
+
+    public ArrayList<Student> getStudents() {
+        return students;
+    }
+
+    public void addStudent(Student student){
+        this.students.add(student);
+    }
+}

src/core/Department.java

+package core;
+
+import java.util.ArrayList;
+
+public class Department {
+    private String name;
+    private ArrayList<Course> courses = new ArrayList<>();
+    public Department(String name){
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public ArrayList<Course> getCourses() {
+        return courses;
+    }
+
+    public void addCourse(Course course){
+        courses.add(course);
+    }
+}

src/core/GradStudent.java

+package core;
+
+import java.util.ArrayList;
+
+public class GradStudent extends Student {
+    private ArrayList<Publication> publications;
+    private Professor advisor;
+    public GradStudent(String firstName,String lastName,String Id,int joiningYear,Department department,Professor advisor){
+        super(firstName,lastName,Id,joiningYear,department);
+        this.advisor=advisor;
+    }
+    public void addpublication(Publication p){
+        publications.add(p);
+    }
+    public ArrayList<Publication> getPublications(){
+        return publications;
+    }
+    public Professor getAdvisor(){
+        return advisor;
+    }
+}

src/core/Person.java

+package core;
+
+public class Person {
+    protected String firstName;
+    protected String lastName;
+    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 getFirstName() {
+        return firstName;
+    }
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+    public String getLastName() {
+        return lastName;
+    }
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+    public String getID() {
+        return ID;
+    }
+    public void setID(String ID) {
+        this.ID = ID;
+    }
+    public int getJoiningYear() {
+        return joiningYear;
+    }
+    public void setJoiningYear(int joiningYear) {
+        this.joiningYear = joiningYear;
+    }
+    public Department getDepartment() {
+        return department;
+    }
+    public void setDepartment(Department department) {
+        this.department = department;
+    }
+}

src/core/Professor.java

+package core;
+
+import java.util.ArrayList;
+
+public class Professor extends AbstractEmployee
+{
+    private ArrayList<Course> courses;
+    private String group;
+
+    public Professor(String firstName, String lastName, String Id, int joiningYear, Department department, int defpay, ArrayList<Statement> statements,String group) {
+        super(firstName, lastName, Id, joiningYear, department, defpay, statements);
+        this.group=group;
+    }
+
+
+    @Override
+    public int incomeCalculate() {
+        return 0;
+    }
+
+    @Override
+    public boolean isPromotable() {
+        return false;
+    }
+
+
+}

src/core/Publication.java

+package core;
+
+public class Publication {
+    private String title;
+    private int year;
+    public Publication(String title,int year){
+        this.year=year;
+        this.title=title;
+    }
+    public String getTitle(){
+        return title;
+    }
+    public int getYear(){
+        return year;
+    }
+}

src/core/ServiceEmployee.java

+package core;
+
+import java.util.ArrayList;
+
+public class ServiceEmployee extends AbstractEmployee
+{
+
+    public ServiceEmployee(String firstName, String lastName, String Id, int joiningYear, Department department, int defpay, ArrayList<Statement> statements) {
+        super(firstName, lastName, Id, joiningYear, department, defpay, statements);
+    }
+
+    @Override
+    public int incomeCalculate() {
+        return 0;
+    }
+
+    @Override
+    public boolean isPromotable() {
+        return false;
+    }
+
+
+}

src/core/Statement.java

+package core;
+
+public class Statement {
+    private double amount;
+    private AbstractEmployee receiver;
+
+    public Statement(double amount, AbstractEmployee receiver) {
+        this.amount = amount;
+        this.receiver = receiver;
+    }
+
+    public double getAmount() {
+        return amount;
+    }
+
+    public void setAmount(double amount) {
+        this.amount = amount;
+    }
+
+    public AbstractEmployee getReciever() {
+        return receiver;
+    }
+
+    public void setReciever(AbstractEmployee reciver) {
+        this.receiver = receiver;
+    }
+}

src/core/Student.java

+package core;
+
+import java.util.ArrayList;
+
+public class Student extends Person
+{
+    private ArrayList<Course> courses;
+
+    public Student(String firstName, String lastName, String ID, int joiningYear, Department department)
+    {
+        super(firstName, lastName, ID, joiningYear, department);
+    }
+
+    public void addCourse(Course c)
+    {
+        courses.add(c);
+    }
+
+    public ArrayList<Course> getCourses()
+    {
+        return courses;
+    }
+}

src/core/Type.java

+package core;
+
+public class Type {
+    private String type;
+    public Type(String type){
+        this.type=type;
+    }
+    public String getType(){
+        return type;
+    }
+}

src/core/UnderGradStudent.java

+package core;
+
+public class UnderGradStudent extends Student{
+        private Type field;
+        public UnderGradStudent(String firstName, String lastName, String Id, int joiningYear, Department department,Type field){
+            super (firstName,lastName,Id,joiningYear,department);
+            this.field=field;
+        }
+        public void setField(Type field){
+            this.field=field;
+        }
+        public Type getField(){
+            return field;
+        }
+}
+
+