package stack;

/*class Superclass

{ Superclass()

{

System.out.println("Printed in Superclass.");

}

}

class Subclass extends Superclass

{ // overrides printMethod in Superclass

Subclass()

{ super();

System.out.println("Printed in Subclass");

}

public static void main(String[] args)

{ Subclass s = new Subclass();

}}

*/

class Base {

int x;

Base(int _x) {

x = _x;

}

}

class Derived extends Base {

int y;

Derived(int _x, int _y) {

super(_x);

y = _y;

}

void Display() {

System.out.println("x = "+x+", y = "+y);

}

}

public class Main {

public static void main(String[] args) {

Derived d = new Derived(10, 20);

d.Display();

}

}