Why is the scan is never closed error and the code doesn't work as it should?

Question

Java

The essence of the program is guessing the number that the computer generates on its own, it would seem that everything is written ok, but at startup a window pops up with a saving error, if you just press ok, it prompts you to enter a number, but do not display the number is there lower or higher?
Also in the line "Scanner scan = new Scanner(System.in);" the development environment prompts "scan is never closed"
:

import java.util.Scanner;

public class HiLo {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    // Генерация случайного числа, которое будет угадыват пользователь
    
    int theNumber = (int)(Math.random() * 100 + 1);
    
    //System.out.println(theNumber);
    int guess = 0;
    while (guess != theNumber) {
      System.out.println("Guess a number between 1 and 100:");
          guess = scan.nextInt();
          
          if (guess < theNumber)
          	System.out.println(guess + " is too low. Try again.");
          else if (guess > theNumber)
          	System.out.println(guess + " is too high. Try again.");
          else
          	System.out.println(guess + " is correct. You win!");
    }
  }
}

Answer 1

With code, everything is tip-top. The problem is most likely with your development environment.
scanner can be closed somewhere at the end.