package average;
import java.util.Scanner;
import java.io.FileNotFoundException;
import java.lang.SecurityException;
import java.util.Formatter;
import java.util.FormatterClosedException;
import java.util.NoSuchElementException;
import java.util.InputMismatchException;




public class Average {

	private static Formatter output;

	public static void main(String[] args)
		{
			openFile();
			addRecords();
			closeFile();
			openFile();
			readRecords();
			closeFile();
		}
		public static void openFile()
		{
			try
			{
				output = new Formatter("numbers.txt");
			}
			catch (SecurityException securityException)
			{
				System.err.println("Write permission denied. Terminating.");
				System.exit(1);
			}
			catch (FileNotFoundException fileNotFoundException)
			{
				System.err.println("Error opening file. Terminating.");
				System.exit(1);
			}
		}
		public static void addRecords()
		{
			Scanner input = new Scanner(System.in);
			System.out.print("Hello, welcome to my program!\n");

			int[] numbers = new int[10];

	        for (int i = 0 ; i < 10 ; i++) {
	        	 System.out.printf("Please enter integer %d: ", i+1);
	             numbers[i] = input.nextInt();

	             {
	            	 try
	            	 {
	            		output.format("Inputted integer: %s%n", String.valueOf(numbers[i]));
	            	 }
	            	 catch (FormatterClosedException formatterClosedexception)
	            	 {
	            		 System.err.println("Error writing to the file. Terminating.");
	            		 break;
	            	 }
	            	 catch (InputMismatchException inputMismatchException)
	            	 {
	            		 System.err.println("Please restart the program and enter integers ONLY.");
	            		 break;
	            	 }
	            	 catch (NoSuchElementException elementException)
	            	 {
	            		 System.err.println("Invalid input. Please try again.");
	            		 input.nextLine();
	            	 }
	            	 //System.out.print("? ");
	             }
	         }
		}
		public static void closeFile()
	    {
	        	 if (output != null)
	        		 output.close();
	    }
		public static void readRecords()
		{
			try
			{
				while (input.hasNext())
				{
					System.out.printf("%s%n", String.valueOf(numbers[i]));
				}
				}


		}
}