initial commit

output.csv

@@ -0,0 +1,3 @@
+supply,188
+buy,115
+result,73

src/main/java/core/basesyntax/WorkWithFile.java

@@ -1,7 +1,50 @@
 package core.basesyntax;
 
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
 public class WorkWithFile {
     public void getStatistic(String fromFileName, String toFileName) {
+        int supplySum = 0;
+        int buySum = 0;
+
+        try (BufferedReader reader = new BufferedReader(new FileReader(fromFileName))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String[] parts = line.split(",");
+                String operation = parts[0].trim();
+                int amount = Integer.parseInt(parts[1].trim());
+
+                if (operation.equals("supply")) { // Виправлено назву
+                    supplySum += amount;
+                } else if (operation.equals("buy")) {
+                    buySum += amount;
+                }
+            }
+        } catch (IOException e) {
+            throw new RuntimeException("Error reading file", e);
+        }
+
+        int result = supplySum - buySum;
+
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(toFileName))) {
+            writer.write("supply," + supplySum + System.lineSeparator());
+            writer.write("buy," + buySum + System.lineSeparator());
+            writer.write("result," + result + System.lineSeparator());
+        } catch (IOException e) {
+            throw new RuntimeException("Error writing to file", e);
+        }
+    }
+
+    public static void main(String[] args) {
+        WorkWithFile workWithFile = new WorkWithFile();
+        String inputFile = "apple.csv";
+        String outputFile = "output.csv";
 
+        workWithFile.getStatistic(inputFile, outputFile);
+        System.out.println("Файл оброблено успішно!");
     }
 }