public class Solution {
    public static void main(String[] args) throws Exception {
        int stackTraceLength = method1().length - method10().length + 1;

        System.out.println("Method1: " + method1().length);

        System.out.println("Method10: " + method10().length);

        System.out.println(stackTraceLength);
    }

    public static StackTraceElement[] method1() {
        method2();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method2() {
        //write your code here
        method3();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;

    }

    public static StackTraceElement[] method3() {
        //write your code here
        method4();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;

    }

    public static StackTraceElement[] method4() {
        //write your code here
        method5();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method5() {
        //write your code here
        method6();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method6() {
        //write your code here
        method7();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method7() {
        //write your code here
        method8();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method8() {
        //write your code here
        method9();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method9() {
        method10();

        StackTraceElement[] element = Thread.currentThread().getStackTrace();

        return element;
    }

    public static StackTraceElement[] method10() {

        return Thread.currentThread().getStackTrace();
    }
}
I am getting 12 for the length of method10() and I don't know why. Thanks in advance.