Because Circle and Rectangle implement Drawable, Circle and Rectangle objects have Drawable type in addition to their class types. Therefore, it’s legal to store each object’s reference in an ...

* the equals method in the Object class. Two Rectangle objects are equal * if their areas are the same. Draw the UML diagram that involves Rectangle, * GeometricObject, and Comparable ...

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

* Models a simple, solid rectangle. * This class represents a Rectangle object. When combined with the GameArena class, * instances of the Rectangle class can be displayed on the screen. public class ...