implemented method

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

@@ -1,8 +1,55 @@
 package core.basesyntax;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
 public class FileWork {
-    public String[] readFromFile(String fileName) {
-        //write your code here
-        return null;
+    private static final int FIRST_ELEMENT = 0;
+    private static final char TARGET_LETTER = 'w';
+    private static final String NON_LETTER_REGEX = "[^\\p{L}]+";
+
+    public String[] readFromFile(String fileName) throws IOException {
+        File file = new File(fileName);
+        if (!file.exists() || file.length() == 0) {
+            return new String[0]; // Return an empty array if the file does not exist or is empty
+        }
+
+        List<String> correctWords = new ArrayList<>();
+
+        try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
+            String line;
+            while ((line = bufferedReader.readLine()) != null) {
+                String[] words = line.split(NON_LETTER_REGEX);
+                for (String word : words) {
+                    if (!word.isEmpty() && word.toLowerCase()
+                            .charAt(FIRST_ELEMENT) == TARGET_LETTER) {
+                        correctWords.add(word.toLowerCase());
+                    }
+                }
+            }
+        }
+
+        List<String> modifiedWords = new ArrayList<>();
+        for (String word : correctWords) {
+            if (word.length() > 1) {
+                modifiedWords.add(word.substring(1));
+            } else {
+                modifiedWords.add("");
+            }
+        }
+
+        Collections.sort(modifiedWords);
+
+        String[] resultArray = new String[correctWords.size()];
+        for (int i = 0; i < modifiedWords.size(); i++) {
+            resultArray[i] = TARGET_LETTER + modifiedWords.get(i);
+        }
+
+        return resultArray;
     }
 }