Why is the strange result in validation?

public class Solution {
    public static void main(String[] args) {
        log("In main method");
    }

    public static void log(String s) {
        StackTraceElement[] elements = Thread.currentThread().getStackTrace();
        System.out.printf("%s%s%s%s%s%s", Solution.class.getCanonicalName(), ": ", System.lineSeparator(), elements[elements.length - 1].getMethodName(),
                ": ", s);
        //write your code here
    }
}

class Test {
    public static void main(String[] args) {
        Solution.log("In Test main method");
    }
}