WS-02-intro-to-oop/src/CourseRegistrationStarter/RegistrationSystem.java

package CourseRegistrationStarter;
import java.util.ArrayList;

public class RegistrationSystem
{
    private ArrayList<Course> courses;

    public RegistrationSystem() {
        courses = new ArrayList<>();
    }

    public void addCourseToSystem(Course c)
    {
        courses.add(c);
    }

    public Course findCourseByCode(String code)
    {
        if(courses.isEmpty())
        {
            System.out.println("NOTHING HAS FOUND !");
            return null;
        }
        else
        {
            for(int i = 0; i < courses.size(); i++)
            {
                Course c = courses.get(i);
                if(code.equals(c.getCourseCode()))
                {
                    return c;
                }
            }
        }
        System.out.println("NOTHING HAS FOUND !");
        return null;
    }

    public void showAllCourses()
    {
        if(courses.isEmpty())
        {
            System.out.println("NOTHING HAS FOUND !");
        }

        for(int i = 0; i < courses.size(); i++)
        {
            Course c = courses.get(i);
            System.out.println("Course "+ (i + 1) + " : " + c.getCourseName()
                    + " | code : " + c.getCourseCode()
                    + " | cpacity : " + c.getCapacity());
        }
    }
}