how to delete the content of text file without deleting itself

Question

I want to copy the content of file \'A\' to file \'B\'. after the copying is done I want to clear the content of file \'A\' and want to write on it from its beginning. I can

Answer 1

I don't believe you even have to write an empty string to the file.

PrintWriter pw = new PrintWriter("filepath.txt");
pw.close();