.noSuchElementException when asking the user for input

Question

I can't run the following piece of code. I would like to know why I keep getting the .noSuchElementException error. I've seen in another post is due to the fact I'm using the same Input stream for both inputs, but creating a new Scanner or using the .close method doesn't seem to fix my problem.

class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner (System.in);

        int tooBig = 0; // parts too big
        int tooSmall = 0; // parts too small
        int perfectParts= 0; // perfect parts

        int a = scanner.nextInt();

        scanner.close();
        for (int i = 0; i <= a ; i++) {
            int j = scanner.nextInt();

            if(j == 1) {
                tooBig++;
            } else if (j == -1) {
                tooSmall++;
            } else if (j == 0) {
                perfectParts++;
            }
            scanner.close();
        }

        System.out.println(perfectParts + " " + tooBig
                + " " + tooSmall);



    }
}

Edit after having removed the scanner.close() method. I still get the same error:

import java.util.Scanner;

class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner (System.in);

        int tooBig = 0; // parts too big
        int tooSmall = 0; // parts too small
        int perfectParts= 0; // perfect parts

        int a = scanner.nextInt();


        for (int i = 0; i <= a ; i++) {
            int j = scanner.nextInt();

            if(j == 1) {
                tooBig++;
            } else if (j == -1) {
                tooSmall++;
            } else if (j == 0) {
                perfectParts++;
            }

        }


        System.out.println(perfectParts + " " + tooBig
                + " " + tooSmall);



    }
}

Answer 1

class Main {
public static void main(String[] args) {

    Scanner scanner = new Scanner(System.in);

    int tooBig = 0; // parts too big
    int tooSmall = 0; // parts too small
    int perfectParts= 0; // perfect parts

    int a = scanner.nextInt();

    
    for (int i = 0; i <= a ; i++) {
        int j = scanner.nextInt();

        if(j == 1) {
            tooBig++;
        } else if (j == -1) {
            tooSmall++;
        } else if (j == 0) {
            perfectParts++;
        }
        
    }

    System.out.println(perfectParts + " " + tooBig
            + " " + tooSmall);

    scanner.close();

}
}

Answer 2

scanner.close(); Should only be called at the very end. It's also not even necessary in your specific case and likely the reason why you're getting that exception.