Abstract classes

Question

Why would this not pass all the cases?!?!

import java.util.*;
import java.lang.*;

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

//your code goes here
public class Square extends Shape {
Square(int w) {
width = w;
}
public void area(){
System.out.println(width*width);
}
}

public class Circle extends Shape {
Circle(int w) {
width = w;
}
public void area(){
int sq = width*width;
System.out.println(Math.PI*sq);
}
}

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

See if this works.
https://www.sololearn.com/discuss/2603950/?ref=app

Answer 2

dont see why it wouldn’t work the same my way, thanks.

Answer 3

class Main {
public static void main(String[] args) {
//do not touch this code
Monopoly monopoly = new Monopoly();
Chess chess = new Chess();
Battleships battleships = new Battleships();

monopoly.play();
chess.play();
battleships.play();
}
}

abstract class Game {
public String name;
abstract String getName();
abstract void play();
}

class Monopoly extends Game {

//give "Monopoly" name to game
String getName() {
return name;

}

// play method should print "Buy all property."
void play() {
System.out.println("Buy all property.");

}
}

class Chess extends Game {

//give "Chess" name to game
String getName() {
return name;

}

// play method should print "Kill the enemy king."
void play() {
System.out.println("Kill the enemy king.");

}
}

class Battleships extends Game {

//give "Battleships" name to game
String getName() {
return name;

}

// play method should print "Sink all ships."
void play() {
System.out.println("Sink all ships.");

}
}