test

public class Test {
public static void main(String[] args) {
    //Student > class name
    // stu > oject name
    // new instantiating the object stu
    // Student() > constructor

    Student stu1 = new Student();
    stu1.printDetails();
    Student stu2 = new Student(123,"Serhat","Yücel",99.9);
    stu2.printDetails();

}
}