Added new Java class FileUtils

power-io/src/main/java/module-info.java

@@ -33,4 +33,5 @@ module powerframework.io {
     requires java.logging;
     requires powerframework.utils;
     exports org.nanoboot.powerframework.io.bit.base64;
+    exports org.nanoboot.powerframework.io.utils;
 }

power-io/src/main/java/org/nanoboot/powerframework/io/utils/FileUtils.java

@@ -0,0 +1,71 @@
+
+///////////////////////////////////////////////////////////////////////////////////////////////
+// power-framework: Java library with many purposes of usage.
+// Copyright (C) 2023-2023 the original author or authors.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation;
+// version 2.1 of the License only.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+package org.nanoboot.powerframework.io.utils;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ *
+ * @author robertvokac
+ */
+public class FileUtils {
+    private FileUtils() {
+        //Not meant to be instantiated.
+    }
+    public static String readTextFromFile(File file) {
+    if (!file.exists()) {
+        return "";
+    }
+    try {
+        return new String(Files.readAllBytes(Paths.get(file.getAbsolutePath())));
+    } catch (IOException ex) {
+        throw new RuntimeException("Reading file failed: " + file.getName(), ex);
+    }
+}
+public static List<String> readLinesFromFile(File file) {
+    String content = readTextFromFile(file);
+    String[] lines = content.split("\\r?\\n|\\r");
+    return Arrays.stream(lines).filter(l -> !l.trim().isEmpty()).collect(
+            Collectors.toList());
+}
+public static void writeTextToFile(String text, File file) {
+    FileWriter fileWriter;
+    try {
+        fileWriter = new FileWriter(file);
+    } catch (IOException ex) {
+        ex.printStackTrace();
+        throw new RuntimeException("Writing to file failed: " + file.getName(), ex);
+    }
+    PrintWriter printWriter = new PrintWriter(fileWriter);
+    printWriter.print(text);
+    printWriter.close();
+}
+
+ 
+}