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package{
import flash.display.Sprite;
public class Main extends Sprite{
public function Main(){
var normalGull:Seagull = new Seagull();
var quietGull:Seagull = new QuietSeagull();
normalGull.squawk(); //The seagull says ‘SQUAAA!'
quietGull.squawk(); //...
var politeGull:Seagull = new PoliteSeagull(); //A new seagull appears
politeGull.eat();
}
}
}
class Seagull
{
public function get weight():Number
{
return 2;
}
public function squawk():void
{
trace("The seagull says 'SQUAAA!'");
}
public function fly():void{
}
public function eat():void{}
}
class QuietSeagull extends Seagull
{
override public function squawk():void
{
trace("...");
}
}
class HungrySeagull extends Seagull
{
override public function get weight():Number
{
return 1.5;
}
}
class PoliteSeagull extends Seagull
{
override public function squawk():void
{
super.squawk();
trace("The shy gull covers his mouth in shame.");
}
override public function fly():void
{
super.fly();
trace("The gull lands and apologizes for blocking out the sun.");
}
override public function eat():void
{
trace("The gull apologizes to the animal it's about to eat.");
super.eat();
}
}
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