Is there an alternative to System.out.printf?

Question

Java

You need to display the following code in the application

System.out.printf("\n x=%.1f  f(x)=%.1f", x, f(x));

how to do this, through the TextView does not work.

Answer 1

String.format("\nx=%.1f f(x)=%.1f", x, f(x)); ?

Answer 2

LogCat.d("TAG","Text"); ?