How to detect if a variable has changed?

Question

I have found myself wanting to do certain things in my programs only if a variable has changed. I have so far been doing something like this:

int x = 1;
in         


        

Answer 1

you can also use flag concept, as when ever changing the value of x . assign true for an boolean variable. Keep boolean with default value as false. check by this way.

This way is better than having getters and setters in base of performance, not to have reduntant code of two methods getters and setters.