can't access inner class's public variable... which is inherited from parent

Java Q: I can't access a public variable in my parent's class' inner class called foo. Why? setup is next(pseudo coded for brevity):

public class PageObject  
{  
    public class Button  
    {  
        public String foo ="I want this string."  //ca开发者_如何学JAVAn't access....  
    }  
    ....other stuff I can access here...  
}  

public class worker
    {  
    public PageObject p = new PageObject();  
    }  

public class workerchild extends worker  
{  
    p.Buttons.    <---don't have access to Buttons public variables, only .class, etc.  
}  

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p.Button is a classname.
Like any other classname, it can only be used to access static members.

You need to get an instance of the Button class. (eg, p.new Button().foo)

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First off, your inner class is called Button (singular), not Buttons (plural). Second, make the inner class static and the foo member a constant and you will be able to access the foo member as simply Button.foo, you just won't be able to change its value.