ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Handling errors
package
{
import flash.display.Sprite;
import flash.text.TextField;
}
public class SimpleError extends Sprite
{
public var employee:XML =
1234
1-234
;
}
public function SimpleError()
{
try
{
if (employee.costCenter.length() != 1)
{
throw new Error("Error, employee must have exactly one cost center assigned.");
}
}
catch (error:Error)
{
var errorMessage:TextField = new TextField();
errorMessage.autoSize = TextFieldAutoSize.LEFT;
errorMessage.textColor = 0xFF0000;
errorMessage.text = error.message;
addChild(errorMessage);
}
}
Using a wider range of error classes and built-in compiler errors, ActionScript 3.0 offers more information than
previous versions of ActionScript about why something has failed. This information enables you to build more stable
applications with better error handling.
Rethrowing errors
Flash Player 9 and later, Adobe AIR 1.0 and later
When you build applications, there are several occasions in which you need to rethrow an error if you are unable to
handle the error properly. For example, the following code shows a nested try..catch block, which rethrows a
custom ApplicationError if the nested catch block is unable to handle the error:
Last updated 6/6/2012
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