Non-blocking (NIO) reading of lines

Question

I need to read a file line by line using java.nio, but nio doesn\'t have a method like readline() to read one, complete line at a time

Answer 1

Using java.nio.file.Files you can do:

Path path = FileSystems.getDefault().getPath("/path/to", "file.txt");
Files.lines(path).forEach(line ->
    // consume line
);

As the lines(path) method returns a Stream, you can take advantage of any other method of the Stream API, like reading just the first line (if one exists) with:

Optional firstLine = Files.lines(path).findFirst();