@@ -0,0 +1,466 @@
+package com.walmart.labs.pcs.normalize.utils;%0A%0Aimport java.util.Observable;%0Aimport java.util.Observer;%0A%0A/**%0A * Created by pzhong1 on 1/15/15.%0A */%0Apublic class ObserverExample %7B%0A    public ObserverExample()%7B%0A        ObservableExample.getObservableExample().addObserver(new Observer() %7B%0A            @Override%0A            public void update(Observable o, Object arg) %7B%0A                System.out.println(%22observer is called: %22 + arg);%0A            %7D%0A        %7D);%0A    %7D%0A%7D%0A

add one observer