Task 5 completed: Interactive parser with file input and user-selected operation

numbers.txt

+40
+35
+-7
+hello
+0
+200

src/DivisionExample.java

-import java.util.Scanner.*;
 import java.util.*;
 
 public class DivisionExample {

src/FileIntegerParser.java

+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class FileIntegerParser {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+
+        // Ask for file path
+        System.out.print("Enter path to the file (e.g., numbers.txt): ");
+        String filePath = input.nextLine();
+
+        ArrayList<Integer> numbers = new ArrayList<>();
+
+        try {
+            File file = new File(filePath);
+            Scanner fileScanner = new Scanner(file);
+            while (fileScanner.hasNextLine()) {
+                String line = fileScanner.nextLine();
+                try {
+                    int number = Integer.parseInt(line.trim());
+                    numbers.add(number);
+                } catch (NumberFormatException e) {
+                    System.out.println("Skipping invalid number format: " + line);
+                }
+            }
+            fileScanner.close();
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found: " + filePath);
+            return;
+        }
+
+        // Ask for operation
+        System.out.println("\nChoose an operation:");
+        System.out.println("1. Sum");
+        System.out.println("2. Average");
+        System.out.println("3. Divide each number by a value");
+        System.out.print("Enter your choice (1/2/3): ");
+        int choice = input.nextInt();
+
+        switch (choice) {
+            case 1:
+                int sum = 0;
+                for (int num : numbers) sum += num;
+                System.out.println("Sum: " + sum);
+                break;
+            case 2:
+                if (numbers.size() > 0) {
+                    double avg = numbers.stream().mapToInt(Integer::intValue).average().orElse(0.0);
+                    System.out.println("Average: " + avg);
+                } else {
+                    System.out.println("No numbers to average.");
+                }
+                break;
+            case 3:
+                System.out.print("Enter divisor: ");
+                int divisor = input.nextInt();
+                if (divisor == 0) {
+                    System.out.println("Cannot divide by zero.");
+                } else {
+                    for (int num : numbers) {
+                        System.out.println(num + " / " + divisor + " = " + (num / (double) divisor));
+                    }
+                }
+                break;
+            default:
+                System.out.println("Invalid choice.");
+        }
+
+        input.close();
+    }
+}

src/numbers.txt

+10
+20
+30
+40
+50
+60
+70
+80
+90
\ No newline at end of file