Chapter 11.9, Problem 11.9.2CP

For the GeometricObject and Circle classes in Listings 11.1 and 11.2, answer the following questions:

a.    Assume that circle and object1 are created as follows:

Circle circle = new Circle(1);

GeometricObject object1 = new GeometricObject();

Are the following Boolean expressions true or false?

(circle instanceof GeometricObject)

(object instanceof GeometricObject)

(circle instanceof Circle)

(object instanceof Circle)

b.    Can the following statements be compiled?

Circle circle = new Circle(5);

GeometricObject object = circle;

c.    Can the following statements be compiled?

GeometricObject object = new GeometricObject();

Circle circle = (Circle)object;