SOLVED | pls tell me what is wrong here?

Question

abstract class Shape {
public int w;
abstract void area();
}
class Square extends Shape{

public void area(int w){
System.out.println(w*w);
}
}
class Circle extends Shape{

public void area(int w){
System.out.println(w*w*Math.PI);
}
}

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

Answer 1

Save code and share link. code is cutoff.
and
Is this about java practice code coach? Then use (Math.PI*w*w), instead of (w*w*Math.PI) for circle area output.

Answer 2

look good to me

Answer 3

In your class Shape write
abstract void area(int w);
and in your main method remove the space between the square brackets after String
main(String[] args)

Answer 4

Could you please LINK your code instead of copying it into the description?

weren't there any constructors in the given code?

Answer 5

only for abstract class

Answer 6

import java.util.*;
abstract class Shape {
public int w;
abstract void area(int w);
}

class Square extends Shape{
public void area(int w){
System.out.println(w*w);
}
}
class Circle extends Shape{

public void area(int w){
System.out.println(w*w*Math.PI);
}
}

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();
Circle b = new Circle();
a.area(x);
b.area(y);
}
}
In your code, you missed the argument for Shape class abstract method.