Adobe FLEX 2-PROGRAMMING ACTIONSCRIPT 3.0 Manual page 150

The classes and interfaces that define the geometric shapes in this example are shown in the
following diagram using Unified Modeling Language (UML) notation:
GeometricShapes Example Classes
<< interface>>
IGeometricShape
+getArea (): Number
+describe(): String
Circle
+diameter : Number
+Circle (): Circle
+getArea (): Number
+describe(): String
+getCircumference (): Number
Defining common behavior with interfaces
This GeometricShapes application deals with three types of shapes: circles, squares, and
equilateral triangles. The GeometricShapes class structure begins with a very simple interface,
IGeometricShape, that lists methods common to all three types of shapes:
package com.example.programmingas3.geometricshapes
{
public interface IGeometricShape
{
function getArea():Number;
function describe():String;
150 Object-Oriented Programming in ActionScript
EquilateralTriangle
+EquilateralTriangle ():EquilateralTriangle
+getArea (): Number
+describe(): String
<< interface>>
IPolygon
+getPerimeter (): Number
+getSumOfAngles (): Number
RegularPolygon
+numSides : int
+sideLength : Number
+RegularPolygon ():RegularPolygon
+getSumOfAngles (): Number
+getPerimeter (): Number
+getArea (): Number
+describe(): String
+Square ():Square
+getArea ():Number
+describe():String
Square