Untitled

import java.time.LocalDate;

public class Booking {

    //===============================================================
    // INSTANCE VARIABLE
    //===============================================================

    private int bookingId;
    private LocalDate bookingDate;
    private Classroom classroom;
    private Lecturer lecturer;

    //===============================================================
    // CONSTRUCTOR
    //===============================================================

    public Booking(LocalDate bookingDate, Classroom classroom, Lecturer lecturer) {
        this.bookingId = generateNextId();
        this.bookingDate = bookingDate;
        this.classroom = classroom;
        this.lecturer = lecturer;
    }

    //===============================================================
    // GENERATE ID
    //===============================================================

    private static int nextId = 50001;

    private static int generateNextId() { //return current id and increment
        return nextId++;
    }

    //===============================================================
    // SETTER
    //===============================================================

    public void setBookingDate(LocalDate bookingDate) {
        this.bookingDate = bookingDate;
    }

    public void setClassroom(Classroom classroom) {
        this.classroom = classroom;
    }

    public void setLecturer(Lecturer lecturer) {
        this.lecturer = lecturer;
    }

    //===============================================================
    // GETTER
    //===============================================================

    public int getBookingId() {
        return bookingId;
    }

    public LocalDate getBookingDate() {
        return bookingDate;
    }

    public Classroom getClassroom() {
        return classroom;
    }

    public Lecturer getLecturer() {
        return lecturer;
    }

    public String toString() {
        return " Booking ID: " + bookingId + " Booking Date: " + bookingDate + " Classroom: " + classroom + " Lecturer: " + lecturer;
    }

}