infosapient.system
Interface Observable

All Known Implementing Classes:

ObservableImpl

public interface Observable

extends java.io.Serializable

Creation date: (04/06/01 11:20:55 AM) Observable was directly adapted from java.util.Observable because the original did not implement java.io.Serializable.

Version:

$Revision: 1.1.1.1 $

Method Summary

void	addObserver(Observer o) Adds an observer to the set of observers for this object.
void	clearChanged()
boolean	containsObserver(Observer o) Test if the Observer exists within the list of observers of this object.
int	countObservers() Returns the number of observers of this object.
void	deleteObserver(Observer o)
void	deleteObservers()
boolean	hasChanged()
void	notifyObservers(java.lang.Object o)
void	setChanged()

Method Detail

addObserver

public void addObserver(Observer o)

Adds an observer to the set of observers for this object.

Parameters:

o - an observer to be added.

Since:

JDK1.0

clearChanged

public void clearChanged()

containsObserver

public boolean containsObserver(Observer o)

Test if the Observer exists within the list of observers of this object.

Parameters:

the - object to be tested.

Returns:

true if the object exists within the list of observers; else false

Since:

JDK1.0

countObservers

public int countObservers()

Returns the number of observers of this object.

Returns:

the number of observers of this object.

Since:

JDK1.0

deleteObserver

public void deleteObserver(Observer o)

deleteObservers

public void deleteObservers()

hasChanged

public boolean hasChanged()

notifyObservers

public void notifyObservers(java.lang.Object o)

setChanged

public void setChanged()