java.util

Interface Observer

public interface Observer

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

Author:

Warren Levy (warrenl@cygnus.com)

See Also:

Observable

Method Summary

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

Method Detail

update

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