Inconsistent behaviour with Java reflection 'invoke' method

Please see these example classes.

A.java:

// A is not public
class A
{
    public static void foo()
    {

    }
}

B.java:

package p;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class B
{
    public void invoke() throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException
    {
        Class clazz = Class.forName("A");
        Method method = clazz.getDeclaredMethod("foo", new Class[0]);
        method.invoke(null, new Object[0]);
    }
}

C.java:

import java.lang.reflect.InvocationTargetException;

public class C extends p.B
{
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException
    {
        C c = new C();
        c.invoke();
    }

//  @Override
//  public void invoke() throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException
//  {
//      Class clazz = Class.forName("A");
//      Method method = clazz.getDeclaredMethod("foo", new Class[0]);
//      method.invoke(null, new Object[0]);
//  }
}

The 'invoke' method in main in C fails with:

IllegalAccessException: Class p.B can not access a member of class A with modifiers "public static"

If the 'invoke' method in C is exactly the same as the overriden method in p.B. However, if it is uncommented no Exception is being thrown.

Why the difference?