Why does my scanner object only allow me to get input from System.in once?

Question

The first time my scanner object is used to take user input, it works perfectly fine. However, from that point forward, whenever I try to take input from System.in, I run into a NoSuchElementException. Does anyone know how to fix this so that I can get input from a user multiple times?

Here's my code:

package com.company;

import java.util.InputMismatchException;
import java.util.Scanner;

public class Practice
{

    static Scanner inputScanner;

    public static void main(String[] arg)
    {
        inputScanner = new Scanner(System.in);

        System.out.println("Enter the number of elements you would like sorted: ");
        int size = inputSize();

        System.out.println("Enter " + size + " integers to be sorted.");
        int[] arr = makeArray(size, inputScanner);
    }


    public static int inputSize() throws InputMismatchException
    {
        try (Scanner s = new Scanner(System.in))
        {
            int size = s.nextInt();
            s.close();
            if (size > 0)
                return size;
        }
        catch (InputMismatchException e)
        {
            System.out.println("User input must be a numerical value.");
            System.exit(0);
        }

        System.out.println("The size of the list must be positive.");
        System.exit(0);
        return 0;
    }

    public static int[] makeArray(int size, Scanner s)
    {
        int[] arr = new int[size];
        for (int i = 0; i < size - 1; i++)
            arr[i] = s.nextInt();
        return arr;
    }

    public void SelectionSort(int[] arr)
    {
        for (int i = 0; i < arr.length; i++)
        {
            int j, minIndex;
            for (j = i + 1, minIndex = i; j < arr.length; j++)
                if (arr[j] < arr[minIndex])
                    minIndex = j;
            int temp = arr[i];
            arr[i] = arr[minIndex];
            arr[minIndex] = temp;
        }
    }
}

Answer 1

Because you are using a try-with-resources here

try (Scanner s = new Scanner(System.in))

that will close the Scanner s and System.in . Don't do that.

Scanner s = new Scanner(System.in);
try

Should fix your issue. System.in is a global . Don't close it.