import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.InputMismatchException;

public class Main {
	public static void processFile(String fname)
			throws FileNotFoundException, InputMismatchException, NegativeIntegerException {
		Scanner inFile = new Scanner(new File(fname));
		int x = inFile.nextInt();
		if (x < 0)
			throw new NegativeIntegerException();
		System.out.println("Data is: " + x);
		inFile.close();
	}

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

		boolean shouldEnd = false;

		while (!shouldEnd) {
			try {
				System.out.print("Input the file pathname: ");
				String fname = in.next();
				processFile(fname);
				shouldEnd = true;
			} catch (FileNotFoundException e) {
				System.out.println("Cannot open the file.");
				System.out.print("Try another file?  Type your choice [y/n]: ");
				shouldEnd = (in.next().charAt(0) == 'n');
			} catch (InputMismatchException e) {
				System.out.println("Cannot read the required number from the opened file.");
				System.out.print("Try another file?  Type your choice [y/n]: ");
				shouldEnd = (in.next().charAt(0) == 'n');
			} catch (NegativeIntegerException e) {
				System.out.println("Unexpected negative value from the file.");
				System.out.print("Try another file?  Type your choice [y/n]: ");
				shouldEnd = (in.next().charAt(0) == 'n');
			}
		}
		in.close();

	}
}

/*
 * Rundown 1
 */

/*
 * Rundown 2
 */