Description

CSE 241/505
Object Oriented Programming
Homework # 7

In this homework, you will write a Java Shape hierarchy that you wrote already for HW5 in C++.

Interface Shape defines at least the following method.
– area that returns the area of the shape
– perimeter that returns the perimeter
– Functions increment and decrement for incrementing and decrementing the shape positions by 1.0.
– This interface implements the Comparable interface to compare shapes with respect to their areas.
– Draw takes a Graphics object as parameter and draws the shape. This method will be called from the paintComponent method of a JPanel object.

Class Rectangle, Triangle, Circle and ComposedShape all implement the Shape
interface. They behave like the classes in HW3. Class ComposedShape keeps an array of Shape references for the shape elements.

Polygon is an abstract class that implements. PolygonVect and PolygonDyn are two concrete classes that derive from Polygon class. One of them uses Collection class ArrayList vectors to keep the 2D points, the other uses Java arrays to keep the 2D points.

We also define the following static methods in a separate class
– Method drawAll takes an array of Shape references and draws all shapes to an JPanel
– Method convertAll takes an array of Shape references, converts all shapes to Polygons and returns a new array with the new shapes.
– Method sortShapes takes an array of Shapes and increasingly sorts them with respect to their areas.

Notes:
• Do error and range checking for any parameters. Throw exceptions and test them in your client code. Do not forget to define the throw lists for your functions.
• For each class you will write appropriate class documentation for Javadoc. You will also submit the Javadoc files.
• As expected, you should follow all object-oriented programming principles.
• You should submit your work to the moodle page.
• You should submit the images of drawn shapes.