package package1;

class Student {
    int id;

    public Student(int id) {
        this.id = id;
    }

    public void display(){
        System.out.println(id);
    }

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

    public int getId(){
        return this.id;
    }
}

class Marks extends Student {
    int id;
    public Marks(int id) { //Constructor inheritance from Student
        super(id+1);
        this.id = id;
//        super.id = id+1;
    }
    @Override
    public void display(){
        System.out.println("Parent ID "+super.id);
        System.out.println("Child ID "+this.id);
    }

    public void setId(int id){ //Method Overriding
        super.id = id;
    }

    public int getId(){
        return super.id;
    }
}

public class OverRiding {

    public static void main(String[] args) {
        Student st = new Student(10);
        st.display();
        Marks mrk = new Marks(12);
//        mrk.setId(10);
        mrk.display();
//        System.out.println(mrk.getId());

    }

}