MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE Reference page 136

class
Availability
Flash Player 6.
Usage
[dynamic] class className
{
// class definition here
}
Parameters
The fully qualified name of the class.
className
The name of the class that
superClass
optional.
interfaceName
parameter is optional.
Description
Statement; defines a custom class, which lets you instantiate objects that share methods and
properties that you define. For example, if you are developing an invoice-tracking system, you
could create an invoice class that defines all the methods and properties that each invoice should
have. You would then use the
The name of the class must match the name of the external file that contains the class. The name
of the external file must be the name of the class with the file extension .as appended. For
example, if you name a class Student, the file that defines the class must be named Student.as.
If a class is within a package, the class declaration must use the fully qualified class name of the
form base.sub1.sub2.MyClass (for more information, see
class's AS file must be stored within the path in a directory structure that reflects the package
structure, such as base/sub1/sub2/MyClass.as (for more information, see
classpath" on page
package and the MyClass.as file should be in the top level of some directory in the path.
For this reason, it's good practice to plan your directory structure before you begin creating
classes. Otherwise, if you decide to move class files after you create them, you have to modify the
class declaration statements to reflect their new location.
You cannot nest class definitions; that is, you cannot define additional classes within a
class definition.
To indicate that objects can add and access dynamic properties at runtime, precede the class
statement with the
keyword. To create subclasses of a class, use the
implements
extend only one class, but can implement several interfaces.) You can use
in a single statement. The following examples show typical uses of the
extends
keywords:
extends
136 Chapter 5: ActionScript Core Language Elements
ActionScript Core Language Elements
[ extends superClass ]
[ implements interfaceName [, interfaceName... ] ]
The name of the interface whose methods
new invoice()
64). If a class definition is of the form "class MyClass," it is in the default
keyword. To declare that a class implements an interface, use the
dynamic
extends (inherits from). This parameter is
className
className
command to create invoice objects.
"Using packages" on page
extends
CHAPTER 5
must implement. This
57). Also, the
"Understanding the
keyword. (A class can
and
implements
implements
and