Call the base class methods from a class inside derived class

Hi,
I wan to know how Ic an call a base class method from from a class inside derived class.

I am trying with belwo code... but it is noo working...
public class DerivedClass: BaseClass {
    private class Job { 
public void run() {
BaseClass.base.methodname()
}
}
}

How can i access the 'BaseClass' method inside 'Job' class...
...