Find out wich class have colled method at run time

Question

hello
If I have one class with some public method, is there a way to find out wich class have called it, and do it at runtime?
I can't modie classes that a using this method.

Answer 1

well if make method to throw something, then I have to by able to handle it within the class that calls it?!
but I cant allter that class.
did I missunderstadn how you mean?
     public boolean isBlocked() throws Throwable{
          try {
               throw new Throwable();                    
          } catch (Exception e) {
               e.printStackTrace(); //And how do I here get the class calling to the method?
               return (nextSeqNum-base >=  windowSize);
     }