What should I put in my constructor to make this work?

Question

import java.util.Scanner;

abstract class Shape {
int width;
abstract void area();

}
//your code goes here
class Square extends Shape{
public void area(int width){
System.out.print(width*width);
}
}
public class Program {
public static void main(String[ ] args) {
Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
int y = sc.nextInt();

Square a = new Square(x);
Circle b = new Circle(y);
a.area();
b.area();
}
}

Answer 1

You didn't create any constructor:

public class Square extends Shape
{

public Square(int w){
this.width = w;
}

@Override
public void area() {
System.out.println(width * width);
}

}