Enforcing and using static variables in sub-classes with Java

I would like to use a static variable from a sub-class in a super-class static method. It seems that I'm not able to ensure that variable is present, since it is static and I cannot enforce static members in this way.

Utimately, I'd like to do similar in functionality to this:

protected class Page {
    WebDriver driver = new ChromeWebDriver();
    public static boolean onPage () {
        return driver.findElements(By.id(PAGE_NAME)) != null;
    }
}

public class HomePage extends Page {
    static String PAGE_NAME = "home";
}

public class LoginPage extends Page {
    static String PAGE_NAME = "login";
}

...
HomePage.onPage();
...

What is the best pattern for something like this?

Note: The primary requirements are:

• onPage() remain static and
• onPage() takes no parameters