OK thanks for your reply. I know in small programs ir probably doesn't make that much difference, I just thought within a larger program using \r\n may be a better way to insert lines and reduce the amount of code. As a new programmer I am trying to to keep future development and implementation in mind when creating simple programs.
But you should be aware of what the difference is: println will use the "line.separator" system property, which differs between platforms. On Windows, it's "\r\n", while on Unix derivatives (like BSD, OS X and Linux) it's "\n". This may matter if you plan to use files cross-platform.
System.out.println will use \r, \n or \r\n, depending on the underlying operating system. So yes, unless you really need \r\n just use println (or %n when using System.out.printf).
Now I know you're going to ask, "when do you really need \r\n?". I can think of two reasons:
1) your output files need to be read with Notepad (the worthless little program can't handle \r or \n, only \r\n)
2) you're working with sockets or HTTP requests. Don't println to a Socket applies, and I believe HTTP explicitly requires \r\n as line separators.