Best way to write String to file using java nio

Question

I need to write(append) huge string to flat file using java nio. The encoding is ISO-8859-1.

Currently we are writing as shown below. Is there any better

Answer 1

This works for me:

//Creating newBufferedWritter for writing to file
BufferedWritter napiš = Files.newBufferedWriter(Paths.get(filePath));
                    napiš.write(what);
//Don't forget for this (flush all what you write to String write):                     
                    napiš.flush();