Question

Write an inheritance hierarchy for classes Quadrilateral, Trapezoid, Parallelogram, Rectangle and Square. Use Quadrilateral as the superclass of the hierarchy. Create and use a Point class to represent the points in each shape. Make the hierarchy as deep (i.e., as many levels) as possible. Specify the instance variables and methods for each class. The private instance variables of Quadrilateral should be the x-y coordinate pairs for the four endpoints of the Quadrilateral. Write a program that instantiates objects of your classes and outputs each object‟s area (except Quadrilateral​

Answer 1

Answer:

CODE:

public class QuadrilateralTest {

public static void main(String[] args) {

// NOTE: All coordinates are assumed to form the proper shapes

// A quadrilateral is a four-sided polygon

Quadrilateral quadrilateral =

new Quadrilateral(1.1, 1.2, 6.6, 2.8, 6.2, 9.9, 2.2, 7.4);

// A parallelogram is a quadrilateral with opposite sides parallel

Parallelogram parallelogram =

new Parallelogram(5.0, 5.0, 11.0, 5.0, 12.0, 20.0, 6.0, 20.0);

// A rectangle is an equiangular parallelogram

Rectangle rectangle =

new Rectangle(17.0, 14.0, 30.0, 14.0, 30.0, 28.0, 17.0, 28.0);

// A square is an equiangular and equilateral parallelogram

Square square =

new Square(4.0, 0.0, 8.0, 0.0, 8.0, 4.0, 4.0, 4.0);

System.out.printf(

"%s %s %s %s\n", quadrilateral, parallelogram,

rectangle, square);

}

}

RESULT:

Coordinates of Quadrilateral are:

2 (1.1, 1.2), (6.6, 2.8), (6.2, 9.9), (2.2, 7.4)

3  

4 Coordinates of Parallelogram are:

5 (5.0, 5.0), (11.0, 5.0), (12.0, 20.0), (6.0, 20.0)

6 Width is: 6.0

7 Height is: 15.0

8 Area is: 90.0

9  

10 Coordinates of Rectangle are:

11 (17.0, 14.0), (30.0, 14.0), (30.0, 28.0), (17.0, 28.0)

12 Width is: 13.0

13 Height is: 14.0

14 Area is: 182.0

15  

16 Coordinates of Square are:

17 (4.0, 0.0), (8.0, 0.0), (8.0, 4.0), (4.0, 4.0)

18 Side is: 4.0

19 Area is: 16.0

Explanation: