/**
 * Ref: https://www.technicalkeeda.com/java-8-tutorials/java-8-stream-find-and-replace-file-content
 */
public static void main(String[] args) {
  try {
    Path path = Paths.get("c:\\demo.txt");
    Stream <String> lines = Files.lines(path);
    List <String> replaced = lines.map(line -> line.replaceAll("foo", "bar")).collect(Collectors.toList());
    Files.write(path, replaced);
    lines.close();
    System.out.println("Find and Replace done!!!");
  } catch (IOException e) {
    e.printStackTrace();
  }
}