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  1. import java.util.*;
  2. import java.io.File;
  3. import java.io.FileNotFoundException;
  4. import java.util.InputMismatchException;
  5. import java.util.Scanner;
  6.  
  7. class AssignmentOne {
  8.     public static void main(String[] args) throws FileNotFoundException, InputMismatchException {
  9.  
  10.         File file = new File("Numbers.txt");
  11.  
  12.         try {
  13.             // Initialize Scanner with file
  14.             Scanner in = new Scanner(file);
  15.  
  16.             double[] arr = new double[10]; // Initialize array
  17.             Arrays.fill(arr, 0.0); // Fills all the array positions with 0.0
  18.  
  19.             // Maximum doubles is 10, but we are not sure if the text
  20.             // file has 10 numbers so we use hasNextDouble
  21.             double sum = 0;
  22.             while (in.hasNext()) {
  23.                 try {
  24.                     sum += in.nextDouble();
  25.                 } catch (InputMismatchException e) {
  26.                     System.out.println("Found a non-numeric value in the file!");
  27.                     in.close();
  28.                     return;
  29.                 }
  30.             }
  31.             System.out.println(sum);
  32.             in.close();
  33.         } catch (FileNotFoundException e) {
  34.             System.out.println("Cannot find the file Numbers.txt");
  35.         }
  36.     }
  37. }
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