tell me the output of this program with explanation

By: vipink*** On: Tue Mar 14 17:49:08 IST 2017     0 0 0	0
class B { public static void main (String[] args) { new B().go("hi",1); new B().go("hi","world",2); } public void go(String...y,int x) { System.out.println(y[y.length-1]+""); } // your code goes here }	0