Can you guys tell what missing in my code i make rawData.txt file and it still give me erro not get nothing in vita

Question

import java.util.Scanner;//did not work

import java.io.File;

import java.io.FileNotFoundException;

import java.io.PrintStream;

public class ReadAndWrite {

    public static void main(String [] args)

            throws FileNotFoundException {

        Scanner diskScanner = new Scanner(new File("rawData.txt"));

        PrintStream diskWriter = new PrintStream("vita.txt");

        double unitPrice, quantity,total;

        unitPrice = diskScanner.nextDouble();

        quantity = diskScanner.nextInt();

        total = unitPrice * quantity;

        diskWriter.println(total);

        diskScanner.close();

        diskWriter.close();

    }

}