Java.whats wrong with my code

Question

import java.util.Scanner;

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

class Circle extends Shape
{
double pi = 3.14, ar;
@Override
public double area(int y)
{
super.area();
ar = pi * y * y;
System.out.println("Area of circle:"+ar);
}
}
class Square extends Shape
{
int ar;
@Override
public int area(int x)
{
super.area ();
ar = x * x;
System.out.println("Area of Square :"+ar);
}
}

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

1. your classes don't have constructors, and you don't use the width property.

2. prototype of the area method in the inherited classes doesn't match the prototype of the area class in the abstract class.

3. you try to call abstract method from the overriden area method with super.area()

I tried to fix it:

https://code.sololearn.com/cREbI3SfkAhY/?ref=app