Using System.out.print(ln?)()

I often use System.out.println and its sister, System.err.println.

However, I'd like to be able to easily switch the type of output my program emits, between not just stdout and a file, but also different formats, each of which would subclass BufferedWriter in order to produce the write format.

I don't know though, because then I'm either trying to return strings from each of my classes, or each class has to have access to the output stream, or I end up passing the output stream around a lot.