java - Difference between System.getProperty("line.separator"); and " "?

Question

While developing GUI with Java FX, I seem to get different results with System.getProperty("line.separator"); and " " during writing to a file or getting data from internet. What basically is the difference?

Answer 1

System.getProperty("line.separator") returns the OS dependent line separator.

On Windows it returns " ", on Unix " ". So if you want to generate a file with line endings for the current operating systems use System.getProperty("line.separator") or write using a PrintWriter.