MainClass

package pack4;

import pack3.Student;
import pack2.Subject;

public class MainClass {

    public static void main(String[] args) {
        Student st = new Student(2, 3, 2);
        System.out.println(st.getId());
        System.out.println(st.getSubjectId());
//        int subjectId = st.getSubjectId();
//        System.out.println(Subject.getSubject(subjectId));
        System.out.println(Subject.getSubject(st.getSubjectId()));
    }
}