# Free Flex SDK

**URL:** <https://forum.kirupa.com/t/free-flex-sdk/299636>\
**Category:** flash\
**Created:** [November 8, 2009, 6:44pm UTC](https://forum.kirupa.com/t/free-flex-sdk/299636 "2009-11-08T18:44:19Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Galland](https://avatars.discourse-cdn.com/v4/letter/g/edb3f5/32.png) [@Galland](https://forum.kirupa.com/u/Galland)\
**Post date:** [November 8, 2009, 6:44pm UTC](https://forum.kirupa.com/t/free-flex-sdk/299636/1 "2009-11-08T18:44:19Z")

</div>

Hi !

I’m trying to compile AS3 with the free Flex SDK.

I’ve been using FlashDevelop as an editor.

[Flashdevelop.org](http://Flashdevelop.org) doesn’t have a tutorial posted yet to show how to do things if you are using this type of workflow.

Here’s what I’ve been doing:

1. I’ve installed the Flex SDK and Java 1.6+ which I understand the SDK needs.

2. I’ve installed FlashDevelop and followed the instructions for enabling it to use the SDK and Flashplayer 10.

3. I enter AS3 code in FlashDevelop - for example (file name is Test.as):

package  
{  
import flash.display.Sprite;  
import flash.events.Event;

```
public class FirstAnimation extends flash.display.Sprite {
    private var ball:Sprite;
    
    public function FirstAnimation() {
        init();
    }
    private function init():void {
        ball = new Sprite();
        addChild(ball);
        ball.graphics.beginFill(0xff0000);
        ball.graphics.drawCircle(0, 0, 40);
        ball.graphics.endFill();
        ball.x = 20;
        ball.y = stage.stageHeight / 2;
        ball.addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }
    private function onEnterFrame(event:Event):void {
    }
    }
}

```

(This code is from Keith Peters’ very wonderful AS3 Animation book.)

1. When I go to FlashDevelop/Project/Test Movie I just end up with a blank swf.

2. When I try to compile by directing Flex SDK to my AS file using the Windows command prompt like so…

C:\AS3Classes C:/Flex/bin/mxmlc.exe Test.as

…I get this error message:

Exception in thread “main” java.io.FileNotFoundException: C:\Flex\bin\mxmlc.jar  
(The system cannot find the file specified)  
at java.util.zip.ZipFile.open(Native Method)  
at java.util.zip.ZipFile.(init)(Unknown Source)  
at java.util.jar.JarFile.(init)(Unknown Source)  
at java.util.jar.JarFile.(init)(Unknown Source)

I notice in the Flash workflow tutorial [Flashdevelop.org](http://Flashdevelop.org) has posted that they tell you this:

\*\* Writing the main class \*\*

When working with Flex you **must** create a main class. This will be the “entry point” of the SWF:

[LIST]  
[_] select the main class in the project tree,  
[_] right-click, select “Always compile”.  
[/LIST]  
package  
{  
import flash.display.Sprite;  
import flash.events.Event;

public class Main extends Sprite  
{  
public function Main():void  
{  
if (stage) init();  
else addEventListener(Event.ADDED\_TO\_STAGE, init);  
}

```
private function init(e:Event = null):void 
{
  removeEventListener(Event.ADDED_TO_STAGE, init);
  // entry point
  addChild(new MySymbol());
}

```

}  
}

OK, after painting this picture, let me boil things down to a couple of questions:

1. Is that error in the command prompt because I somehow haven’t installed Java 1.6+ correctly?

2. Is that thread “main” the SDK can’t seem to find actually a Main class I need to write?

3. Am I missing some vital piece of information I need in order to set up a workflow like this?

OK, well, it’s true I AM in several fathoms over my head!

I’ve always gotten truly excellent support here, and any help anyone may offer me for this quandary is as usual, most gratefully received.

Thank you & regards,

Galland@squareheadsRus  
:block: