May I know what's the problem in the code

Question

https://code.sololearn.com/c2ZlwkoD6932/?ref=app

Answer 1

variable 'x' is defined in main function and hence the method 'function' can't find it. Declare'x' as a instance variable (before starting any function) and the program will work correctly

Answer 2

You may want to arrange it like this, remeber that static variables belong to the class and not the object they have a class scope and cant be declared inside of a methods not even the main method this is the same for static methods.

public class Program
{

static int x=0;

Program()
{
x++;
}

public static void main(String[] args) {

Program p1=new Program();
Program p2=new Program();
Program p3=new Program();
System.out.println(x);
}
}