Class Letter

java.lang.Object
  |
  +--java.util.Observable
        |
        +--Letter

All Implemented Interfaces:

Observer

public class Letter

extends Observable

implements Observer

A letter to be sorted at the post office.

Field Summary

Address	address Address for this.
String	body Message for this.

Constructor Summary

Letter(Address anAddress, String aBody)
Constructs a new letter.

Method Summary

boolean	isHighlighted() Returns whether or not this should be highlighted.
void	update(Observable anObservable, Object anArgument) Updates this when the address is changed.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

address

public Address address

Address for this.

body

public String body

Message for this.

Constructor Detail

Letter

public Letter(Address anAddress,
              String aBody)

Constructs a new letter.

Parameters:

anAddress - address for the letter

aBody - body for the letter

Method Detail

update

public void update(Observable anObservable,
                   Object anArgument)

Updates this when the address is changed.

Specified by:

update in interface Observer

Parameters:

anObservable - observable that has changed

anArgument - argument for change

isHighlighted

public boolean isHighlighted()

Returns whether or not this should be highlighted.