package com.example.stimulusStrategy; import com.example.stimulus.Stimulus; import java.util.Observable; import java.util.Observer; /** * Created by pharmacy on 09/01/2018. */ public class Clock extends Observable implements StimulusStrategy { public void monitor() { //Monitor a thing setChanged(); notifyObservers(); clearChanged(); } public void addObserver(Stimulus s) { addObserver((Observer) s); } }