How to invoke parent private method from child? [duplicate]

Answer 1

getDeclaredMethod will only return the private methods in the current class not the inherited methods. To achieve it you need to navigate the inheritance graph via the getSuperclass method. Here is a code snippet that does it

  private Method getPrivateMethod(Object currentObject) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
  Class currentClass = currentObject.getClass();
  Method method = null;
  while (currentClass != null && method == null) {
      try {
          method = currentClass.getDeclaredMethod("getC");
      } catch (NoSuchMethodException nsme) {
          // method not present - try super class
          currentClass = currentClass.getSuperclass();
      }
  }
  if (method != null) {
      method.setAccessible(true);
      return method;
  } else {
      throw new NoSuchMethodException();
  }

}