🚀 go-pugleaf

Carlos Zin wrote:
> Please suppose I have the following case where Tool is a class defined 
> somewhere else:
> 
> public class ToolFactory {
> 
>     private class A extends Tool {}
> 
>     private class B extends Tool {}
> 
>     public static Tool makeTool(String toolName) {
>         if (toolName == "A")
>             return new A();
>         else if (toolName == "B")
>             return new B();
>         else
>             return null;
>     }
> }
> 
> I am trying to build a static factory method named "makeTool()" which 
> produces instances of classes A and B but the compiler complain telling that 
> non-static variable this cannot be referenced from a static context.
> 
> Making the method non-static eliminate the error but then I need to make an 
> instance of Toolfactory in order to access method makeTool(s) which is not 
> what I want. I need to call "ToolFactory.makeTool(s)", i.e. a static method 
> with no object instance.
> How can I solve this problem?
> 
> 
> 

I just ran into this.  It's maddening and embarrassing all at the same 
time.  You need to use:

return new ToolFactory.A();
return new ToolFactory.B();

-- 

Regards,

Lori Olson [TeamB]

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