“What does System.out.printf (“”%s%s””, “”.o””, “”Oo.””); print out?” June 21, 2017 mfadmin Java Programming Average Rating 0 out of 5 stars. 0 votes.You must log in to submit a review. “What does System.out.printf (“”%s%s””, “”.o””, “”Oo.””); print out?” .oOo.