Why my code does not work? [solved]

Question

Here is my code:

Can anyone help me?
https://code.sololearn.com/cywV8UQN3IGT/?ref=app

Answer 1

Overiding a method should have same return type
In the code you changed the return type so it's throwing u the error
Change the return type to same in overriding method to same as overridden method or vice versa and 1 more thing for abstract class(" Circle b = new Circle(y)" ) u can't create object

Answer 2

your mistake : while overriding abstract class , the signature of methods should be same. and also Circle class wasn't supposed to be abstract.

here is a working example :

https://code.sololearn.com/ckfESWf1TdBL/?ref=app

hope that helps.

Answer 3

KindCat
I have updated the code.
now try and say .

My mistake : The sololearn judge was expecting a double. So casting the value to double should work.

Answer 4

KindCat

No.

In the return type of area() of Circle type.

sololearn provides (for this question) int as input.

See my code i have updated and tested it :

https://code.sololearn.com/ckfESWf1TdBL/?ref=app

Answer 5

Prashanth Kumar, in the main, I should read double type?

Answer 6

Prashanth Kumar

No need to cast (Math.PI * width * width) with double because Math.PI is already a double value.

Answer 7

https://code.sololearn.com/cu89ghPUQgCS/?ref=app
Here I have solved the problem and explained everything in the comment

Answer 8

Help you, Prashanth Kumar and Nivya. But my code still doesn't pass all tests.
My code passes 1st, 2nd, 4th and 5th tests.

Answer 9

I'm sorry ,where is the problem statement by the way?

Answer 10

Here is my final code. But there is some error with brackets. I don't understand where is an error.
https://code.sololearn.com/cFt4CkuSrF7Y/?ref=app

Answer 11

Prashanth Kumar , thank you very much!

Answer 12

What does it mean:
import java.lang.*
?
Prashanth Kumar

Answer 13

KindCat

java.lang is a package and .* means all classes in that package.

So if you write import java.lang.*; then all classes will be import

Answer 14

Prashanth Kumar
KindCat

No need to import java.lang.*; package because it is bydefault imported by JVM.

Answer 15

What does it do? I understand that * is "all"

Answer 16

In the code u have mentioned abstract class void area that and in overriding u gave mentioned it as int area() and u have mentioned circle class as a abstract

Answer 17

Thanks for everyone