What is wrong with this? And how could I get the proper answer?

package pl.codegym.task.task09.task0905; /* Krok po kroku po śladach stosu... */ public class Solution { public static void main(String[] args) throws Exception { int glebokosc = getGlebokoscStosu(); System.out.println(glebokosc); } public static int getGlebokoscStosu() { // tutaj wpisz swój kod //StackTraceElement stos[] = Thread.currentThread().getStackTrace(); // return stos.length; return Thread.currentThread().getStackTrace().length; } }