Java Stack Walking - How to find caller of the current method?

package com.logicbig.example;

public class StackWalkerUtil {

    public static String getCaller() {
        StackWalker stackWalker = StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
        StackWalker.StackFrame frame = stackWalker.walk(stream1 -> stream1.skip(2)
                                                                          .findFirst()
                                                                          .orElse(null));
        if (frame == null) {
            return "caller: null";
        }
        return String.format("caller: %s#%s, %s",
                frame.getClassName(),
                frame.getMethodName(),
                frame.getLineNumber()
        );
    }

    public static void main(String[] args) {
        testMethod();
    }

    public static void testMethod() {
        //gets caller of the current method
        String caller = getCaller();
        System.out.println(caller);
    }
}