Flex，ActionScript-StringUtil

Question

I am trying to edit an already existing Flex project, and I see a warning on the line " import com.Adobe.utils.StringUtil; " and the warning it shows is

Multiple markers at this line:
-mx
-The import utils could not be found.
-The import StringUtil could not be found.

so what could be the problem?

Well I was wondering what is the difference between import com.Adobe.utils.StringUtil; and import mx.utils.StringUtil;

Answer 1

com.adobe.utils.StringUtil and mx.utils.StringUtil are different classes. From the manual of mx.utils.StringUtil :

The StringUtil utility class is an all-static class with methods for working with String objects within Flex.

Mark that within Flex part.

And com.adobe.utils.StringUtil is part of Adobe's as3corelib which is a pure AS3 library and offers different methods. You need to add the as3corelib's StringUtil to remove the warning.

Answer 2

com.adobe.utils.StringUtil is from the as3corelib -- https://github.com/mikechambers/as3corelib

If this is not included in your project, then flex can't find it. You can either include it or change all imports to use the mx path. However, there might be a specific reason the as3corelib was included in the old project, so be aware of that.