Why the input commands don't work?

Question

I just can't run my program and That's because I don't know how to write the Input commands here.
I wrote "reader.nextInt();"
But it didn't work..
https://code.sololearn.com/ck4Wqhdu1Ypm/?ref=app

Answer 1

here it is
import java.util.*;
public class Program
{
public static void main(String[] args) {
int Num, Max;
/* Hello, please follow the commands bellow~
*/
Scanner reader = new Scanner(System.in);
Num=reader.nextInt();
Max = reader.nextInt();
if(Num>Max)
Max=Num;
else
Max=Max;
}
}

Answer 2

You haven't imported and instantiated Scanner Class

Answer 3

Oh, thank you a lot.
I guess I used to write it without the System in command cause when we learn at school we write codes in our Notebooks.
Thank you for fixing my Program!