How to update JLabel in Swing?

Question

I am trying to use Swing Timer and I wanted to start from a very simple program. I have a window with text: \"You have n seconds\", where n changes from 10 to 0 every second

Answer 1

Hi bro use observer pattern . That is ,your ui class sould be listener of your timer structure.When your variable changes ,invoke the listeners of your timer which is your ui class.

//your observer class 

update(Object obj){

label.setText(obj.toString());
}
...

//your observable class
//when timer changes varible's value  you should call invokeListeners() 


invokeListener(){

for(Listener listener :listeners)
listener.update(getSecond());
}

I dont know your class and structure.But i used this solution in one of my assignments.