无法访问内部类的公共变量...它是从父类继承的
Java 问：我无法访问父类的内部类 foo 中的公共变量。为什么？接下来是设置（为简洁起见，使用伪编码）：
public class PageObject
{
public class Button
{
public String foo ="I want this string." //can'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.
}
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." //can'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是一个类名。与任何其他类名一样，它只能用于访问静态成员。
您需要获取
Button类的实例。 （例如，p.new Button().foo）p.Buttonis a classname.Like any other classname, it can only be used to access static members.
You need to get an instance of the
Buttonclass. (eg,p.new Button().foo)首先，您的内部类称为 Button（单数），而不是 Buttons（复数）。其次，将内部类设置为静态并将
foo成员设置为常量，您将能够以Button.foo的形式访问foo成员，你只是无法改变它的值。First off, your inner class is called Button (singular), not Buttons (plural). Second, make the inner class static and the
foomember a constant and you will be able to access thefoomember as simplyButton.foo, you just won't be able to change its value.