added BufferedReader

added letterForSorting

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

@@ -1,8 +1,54 @@
 package core.basesyntax;
 
+import java.io.BufferedReader;
+import java.io.StringReader;
+import java.util.Arrays;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 public class FileWork {
+    private static final String letterForSorting = "w";
+
     public String[] readFromFile(String fileName) {
-        //write your code here
-        return null;
+
+        try {
+            BufferedReader bufferedReader = new BufferedReader(new StringReader(fileName));
+            StringBuilder stringBuilder = new StringBuilder();
+            String content = bufferedReader.readLine();
+
+            while (content != null) {
+                stringBuilder.append(content);
+                content = bufferedReader.readLine();
+            }
+            String inputText = stringBuilder.toString().toLowerCase();
+
+            Pattern pattern = Pattern.compile("[^a-z]+");
+            Matcher matcher = pattern.matcher(inputText);
+            String result = matcher.replaceAll(" ");
+
+            String[] wordsArray = result.split(" ");
+            int count = 0;
+
+            for (String word : wordsArray) {
+                if (word.startsWith(letterForSorting)) {
+                    count++;
+                }
+            }
+
+            String[] filteredWords = new String[count];
+            int index = 0;
+
+            for (String word : wordsArray) {
+                if (word.startsWith("w")) {
+                    filteredWords[index++] = word;
+                }
+            }
+            Arrays.sort(filteredWords);
+            System.out.println(Arrays.toString(filteredWords));
+            return new String[]{Arrays.toString(filteredWords)};
+        } catch (Exception e) {
+            return new String[0];
+        }
     }
+
 }