java.util

Interface Observer

public interface Observer

Interface that is implemented when a class wants to be informed of changes in Observable objects.

UNKNOWN: updated to 1.4

Method Summary
void	update(Observable observable, Object arg) This method is called whenever the observable object changes, and has called `notifyObservers`.

Method Detail

update

public void update(Observable observable, Object arg)

This method is called whenever the observable object changes, and has called notifyObservers. The Observable object can pass arbitrary information in the second parameter.

Parameters: observable the Observable object that changed arg arbitrary information, usually relating to the change