Observable<T> Class

Package:

system.fabric

• java.lang.Object
• • system.fabric.Observable<T>

Type Parameters

T

Takes a template parameter T.

public class Observable

This class represents an observable object

Constructor Summary

Constructor	Description
Observable()	Instantiates an system.fabric.Observable object.

Method Summary

Modifier and Type	Method and Description
void	addObserver(Observer<? super T> observer) Adds an observer to the set of observers for this object.
void	clearObservers() Removes all the observers of this class.
int	countObservers() Number of observers of this object.
List<Observer<? super T>>	getAllObservers() Lists all the observers of this object.
void	notifyObservers(final Object sender) Notify all of its observers
void	notifyObservers(final Object sender, final T value) Notify all of its observers
void	removeObserver(Observer<? super T> observable) Removes an observer from the set of observers of this object.

Constructor Details

Observable

public Observable()

Instantiates an system.fabric.Observable object.

Method Details

addObserver

public void addObserver(Observer observer)

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

Parameters:

observer - Takes an Observer<U> object as parameter.

clearObservers

public void clearObservers()

Removes all the observers of this class.

countObservers

public int countObservers()

Number of observers of this object.

Returns:

Returns integer count of all the observers.

getAllObservers

public List<>> getAllObservers()

Lists all the observers of this object.

Returns:

A java.util.List of Observer<U>

notifyObservers

public void notifyObservers(final Object sender)

Notify all of its observers

Parameters:

sender - sender object.

notifyObservers

public void notifyObservers(final Object sender, final T value)

Notify all of its observers

Parameters:

sender - sender object.

value - value to notify with.

removeObserver

public void removeObserver(Observer observable)

Removes an observer from the set of observers of this object.

Parameters:

observable -

Observer<U> object as parameter.