Package Index | Class Index

Interfaces
- Collection<E>
- Comparator<T>
- Deque<E>
- Enumeration<E>
- EventListener
- Formattable
- Iterator<E>
- List<E>
- ListIterator<E>
- Map<K, V>
- Map.Entry<K, V>
- NavigableMap<K, V>
- NavigableSet<E>
- Observer
- Queue<E>
- RandomAccess
- Set<E>
- SortedMap<K, V>
- SortedSet<E>
Classes
- AbstractCollection<E>
- AbstractList<E>
- AbstractMap<K, V>
- AbstractMap.SimpleEntry<K, V>
- AbstractMap.SimpleImmutableEntry<K, V>
- AbstractQueue<E>
- AbstractSequentialList<E>
- AbstractSet<E>
- ArrayDeque<E>
- ArrayList<E>
- Arrays
- BitSet
- Calendar
- Collections
- Currency
- Date
- Dictionary<K, V>
- EnumMap<K extends Enum<K>, V>
- EnumSet<E extends Enum<E>>
- EventListenerProxy
- EventObject
- FormattableFlags
- Formatter
- GregorianCalendar
- HashMap<K, V>
- HashSet<E>
- Hashtable<K, V>
- IdentityHashMap<K, V>
- LinkedHashMap<K, V>
- LinkedHashSet<E>
- LinkedList<E>
- ListResourceBundle
- Locale
- Observable
- PriorityQueue<E>
- Properties
- PropertyPermission
- PropertyResourceBundle
- Random
- ResourceBundle
- ResourceBundle.Control
- Scanner
- ServiceLoader<S>
- SimpleTimeZone
- Stack<E>
- StringTokenizer
- Timer
- TimerTask
- TimeZone
- TreeMap<K, V>
- TreeSet<E>
- UUID
- Vector<E>
- WeakHashMap<K, V>
Enums
- Formatter.BigDecimalLayoutForm
Exceptions
Errors
- ServiceConfigurationError

Since: API Level 1

public interface

Observer

java.util.Observer

Class Overview

Observer is the interface to be implemented by objects that receive notification of updates on an Observable object.

See Also

Observable

Summary

Public Methods
abstract void	update(Observable observable, Object data) This method is called if the specified `Observable` object's `notifyObservers` method is called (because the `Observable` object has been updated.

Public Methods

public abstract void update (Observable observable, Object data)

Since: API Level 1

This method is called if the specified Observable object's notifyObservers method is called (because the Observable object has been updated.

Parameters

observable	the `Observable` object.
data	the data passed to `notifyObservers(Object)`.