project.java

public class Accountant {

    int id;
    String name;

    public Accountant(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

public class Student {

    int id;
    String name;
    int feeDue;


    public Student(int id, String name, int feeDue) {
        this.id = id;
        this.name = name;
        this.feeDue = feeDue;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getFeeDue() {
        return feeDue;
    }

    public void setFeeDue(int feeDue) {
        this.feeDue = feeDue;
    }
}
import java.util.ArrayList;
import java.util.Scanner;

public class Main {

    static ArrayList<Accountant> listOfAccountant = new ArrayList<Accountant>();
    static ArrayList<Student> listOfStudent = new ArrayList<Student>();

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        while (true) {
            System.out.println("Enter admin/accountant to enter  or exit to get out of the system");
            String position = sc.next();
            if (position.equals("exit"))
                break;
            if (position.equals("admin")) {
                while (true) {
                    System.out.println("1-add");
                    System.out.println("2-view");
                    System.out.println("3-edit");
                    System.out.println("4-delete");
                    System.out.println("5-exit");
                    int input = sc.nextInt();

                    if (input == 1) {
                        System.out.println("Enter id of accountant");
                        int a = sc.nextInt();
                        System.out.println("Enter name of Accountant");
                        String b = sc.next();
                        Accountant accountant = new Accountant(a, b);
                        listOfAccountant.add(accountant);
                    } else if (input == 2) {
                        for (int i = 0; i < listOfAccountant.size(); i++) {
                            if (listOfAccountant.get(i) != null)
                                System.out.println(listOfAccountant.get(i).getId() + " " + listOfAccountant.get(i).getName());
                        }
                    } else if (input == 4) {
                        System.out.println("Enter the id od the accountant you want to delete");
                        int a = sc.nextInt();
                        for (int i = 0; i < listOfAccountant.size(); i++) {
                            if (a == listOfAccountant.get(i).getId())
                                listOfAccountant.set(i, null);
                        }
                    }
                    if (input == 3) {
                        System.out.println("Enter the id of the accountant you want to edit");
                        int a = sc.nextInt();
                        int positionOfEdit = -1;
                        for (int i = 0; i < listOfAccountant.size(); i++) {
                            if (a == listOfAccountant.get(i).getId()) {
                                positionOfEdit = i;
                                break;
                            }
                        }
                        System.out.println("Enter the edited id of the person");
                        int b = sc.nextInt();
                        System.out.println("Enter the edited new name of the person");
                        String c = sc.next();
                        Accountant accountant = new Accountant(b, c);
                        listOfAccountant.set(positionOfEdit, accountant);

                    }
                    if (input == 5)
                        break;

                }
            }


            if (position.equals("accountant")) {
                while (true) {
                    System.out.println("Enter your id");
                    int a = sc.nextInt();
                    int found = -1;
                    if (listOfAccountant.size() == 0) {
                        System.out.println("The admin hasn't add any accountant yet contact the admin");
                        break;
                    }
                    for (int i = 0; i < listOfAccountant.size(); i++) {
                        if (a == listOfAccountant.get(i).getId())
                            found = 1;
                    }
                    if (found == 1) {
                        System.out.println("1-Add");
                        System.out.println("2-View");
                        System.out.println("3-Edit");
                        System.out.println("4-Delete");
                        System.out.println("5-Check Dues");
                        System.out.println("6-LogOut");
                        int k = sc.nextInt();
                        if (k == 1) {
                            System.out.println("Enter id of student");
                            int b = sc.nextInt();
                            System.out.println("Enter name of the student");
                            String name = sc.next();
                            System.out.println("Enter amount due");
                            int due = sc.nextInt();

                            Student student = new Student(b, name, due);
                            listOfStudent.add(student);
                        }
                        if (k == 2 || k == 5) {
                            for (int i = 0; i < listOfStudent.size(); i++) {
                                if (listOfStudent.get(i) != null)
                                    System.out.println(listOfStudent.get(i).id + " " + listOfStudent.get(i).getName() + " " + listOfStudent.get(i).getFeeDue());
                            }
                        }
                        if (k == 3) {
                            System.out.println("Enter the id of student to edit");
                            int id = sc.nextInt();
                            int positioToFound = -1;
                            for (int i = 0; i < listOfStudent.size(); i++) {
                                if (id == listOfStudent.get(0).getId()) {
                                    positioToFound = i;
                                    break;
                                }
                            }

                            System.out.println("eNTER THE EDITED ID");
                            int v = sc.nextInt();
                            System.out.println("Enter the edited name");
                            String s = sc.next();
                            System.out.println("Enter the edited due amount");
                            int d = sc.nextInt();
                            Student student = new Student(v, s, d);
                            listOfStudent.set(positioToFound, student);


                        }
                        if (k == 4) {
                            System.out.println("Enter the id of student to delete");
                            int idToDelete = sc.nextInt();
                            for (int i = 0; i < listOfStudent.size(); i++) {
                                if (listOfStudent.get(0).getId() == idToDelete) {
                                    listOfStudent.set(i, null);
                                    break;
                                }
                            }

                        }
                        if (k == 6)
                            break;

                    } else {
                        System.out.println("Your ID seems Invalid we are logging you out");
                        break;
                    }
                }
            }

        }


    }
}