Realised method readFromFile which receive fileName as a link to the …

…file and method create array filtered by SPECIFIED_CHARACTER

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 char SPECIFIED_CHARACTER = 'w';
+
     public String[] readFromFile(String fileName) {
-        //write your code here
-        return null;
+        File file = new File(fileName);
+        if (file.length() == 0) {
+            return new String[0];
+        }
+        StringBuilder stringBuilder = new StringBuilder();
+        try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
+            String line = bufferedReader.readLine();
+            while (line != null) {
+                stringBuilder.append(line).append(System.lineSeparator());
+                line = bufferedReader.readLine();
+            }
+        } catch (IOException e) {
+            throw new RuntimeException("Unable to read the file", e);
+        }
+        String[] stringArray = stringBuilder.toString().toLowerCase()
+                .split("\\s+");
+        for (int i = 0; i < stringArray.length; i++) {
+            stringArray[i] = stringArray[i].replaceAll("[^a-z]", "");
+        }
+        int specifiedCharWordsCounter = 0;
+        for (String stringStartedAtW : stringArray) {
+            if(stringStartedAtW.charAt(0) == SPECIFIED_CHARACTER) {
+                specifiedCharWordsCounter++;
+            }
+        }
+        if (specifiedCharWordsCounter == 0) {
+            return new String[0];
+        }
+        String[] filteredArray = new String[specifiedCharWordsCounter];
+        int j = 0;
+        for (String word : stringArray) {
+            if (!word.isEmpty() && word.charAt(0) == SPECIFIED_CHARACTER) {
+                filteredArray[j] = word; // Добавляем слово в массив
+                j++; // Увеличиваем индекс для следующего элемента
+            }
+        }
+        Arrays.sort(filteredArray);
+
+    return filteredArray;
     }
 }