complited task

src/main/java/core/basesyntax/FileWork.java

@@ -1,8 +1,53 @@
 package core.basesyntax;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Arrays;
+
 public class FileWork {
+    private static final int INDEX_OF_FIRST_CHAR = 0;
+    private static final int STARTING_INDEX = 0;
+
     public String[] readFromFile(String fileName) {
         //write your code here
-        return null;
+        File file = new File(fileName);
+        String[] wordsStartingWithW;
+
+        try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
+            StringBuilder stringBuilder = new StringBuilder();
+            String value = bufferedReader.readLine();
+
+            while (value != null) {
+                stringBuilder.append(value).append(" ");
+                value = bufferedReader.readLine();
+            }
+            String[] words = stringBuilder.toString().split("\\W+");
+
+            int counter = 0;
+            for (String word : words) {
+                if (!word.isEmpty() && (word.charAt(0) == 'w' || word.charAt(0) == 'W')) {
+                    counter++;
+                }
+            }
+            wordsStartingWithW = new String[counter];
+
+            int index = STARTING_INDEX;
+            for (String word : words) {
+                if (!word.isEmpty() && (word.charAt(INDEX_OF_FIRST_CHAR) == 'w'
+                        || word.charAt(0) == 'W')) {
+                    wordsStartingWithW[index] = word.toLowerCase();
+                    index++;
+                }
+            }
+
+            Arrays.sort(wordsStartingWithW);
+
+        } catch (IOException e) {
+            throw new RuntimeException("Error" + e.getMessage(), e);
+        }
+
+        return wordsStartingWithW;
     }
 }