Flash / Flex / ActionScript/Class/Access Control Modifiers

Access Control Modifiers for Classes are listed before the keyword class in a class definition

 
attribute class ClassIdentifier {
}
To add the public attribute to the MyClass class
package com.wbex {
  public class MyClass {
  }
}
Explicitly indicate that MyClass is used within the com.wbex package only with internal attribute
package com.wbex {
 internal class MyClass {
 }
}
A class defined with the internal attribute can be used within its containing package only.

Declares a new private property called _id within the Example class:

 
package {
    public class Example {
        private var _id:String;
    }
}

Inherit protected variable

 
    class Toaster
    {
        protected var finish:String = "Reflective Silver";
    }
    class HeatedResistorToaster extends Toaster
    {
        public function HeatedResistorToaster()
        {
            trace(finish); //Reflective Silver
        }
    }

Internal variable

 
    class Bread
    {
        internal var toastiness:Number = 0;
    }
    class Pillow
    {
        public function Pillow()
        {
            var b:Bread = new Bread();
            b.toastiness = 20; //Compiler error! You can"t do this!
        }
    }

private variable is not inherited

 
    class Toaster
    {
        private var finish:String = "Reflective Silver";
    }
    class HeatedResistorToaster extends Toaster
    {
        public function HeatedResistorToaster()
        {
            trace(finish); //Compiler error! We don"t have a finish.
        }
    }

protected member variables

 

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var r = new Rectangle(  );
        r.setSize(4,5);
        trace(r.getArea(  )); 
        
        var s = new Square(  );
        s.setSize(4,5);
        trace (s.getArea());  
    }
  }
}
class Rectangle {
  protected var w = 0;
  protected var h = 0;
  public function setSize (newW, newH) {
    w = newW;
    h = newH;
  }
  public function getArea (  ) {
    return w * h;
  }
}
class Square extends Rectangle {
  override public function setSize (newW, newH) {
    if (newW == newH) {
      w = newW;
      h = newH;
    }
  }
}

The Internal Details

 
package {
  public class SomeClass {
    public function instanceMeth (  ):void {
      function nestedFunc (  ):void {
        trace(a);
      }
    }
  }
}
var a:int = 15;