First time to use a library

Please help me I'm new here I am still ignorant with processing, after downloading this library https://github.com/aerrity/inputs is it automatically connected to processing? because i want to use inputs something like this.

import iadt.creative.Inputs;

String x;
do
{
  x = Inputs.readString("Enter your age");
  println(x);
}while (x != null);

/* this code is taken from other source and i
want to try this one but i don't know what to
do after downloading the library. */

please help really need for my requirement. :) thank you in advance