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Nat2105 [25]
3 years ago
14

Write an inheritance hierarchy for classes Quadrilateral, Trapezoid, Parallelogram, Rectangle and Square. Use Quadrilateral as t

he 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​
Computers and Technology
1 answer:
Ymorist [56]3 years ago
7 0

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:

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Answer:

The java program for the given scenario is as follows.

import java.util.*;

import java.lang.*;

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}

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Explanation:

1. The variables to hold the bill and tip percent are declared as double and initialized with the given values.

static double bill=47.28, tip=0.15;

2. The variables to hold the values of total bill amount and total tip are declared as double.

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5. The share of each person is displayed to the user. The value is displayed with only two decimal places which is assured by %.2f format modifier. The number of decimal places required can be changed by changing the number, i.e. 2. This format is used with printf() and not with println() method.

System.out.printf("Each person needs to pay: $%.2f", share1);  

6. The program is not designed to take any user input.

7. The program can be tested for any value of bill and tip percent.

8. The whole code is put inside a class since java is a purely object-oriented language.

9. Only variables can be declared outside method, the logic is put inside a method in a purely object-oriented language.

10. As shown, the logic is put inside the main() method and only variables are declared outside the method.

11. Due to simplicity, the program consists of only one class.

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