In Java, how do I call a base class's method from the overriding method in a derived class?

The keyword you're looking for is super. See this guide, for instance.

Just call it using super.

public void myMethod()
{
    // B stuff
    super.myMethod();
    // B stuff
}

Answer is as follows:

super.Mymethod();
super();                // calls base class Superclass constructor.
super(parameter list);          // calls base class parameterized constructor.
super.method();         // calls base class method.