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Homework 2Before attempting this project, be sure you have completed all of the reading assignments, hands-onlabs, discussions, and assignments to date.(25 points) Design a Java class named Polygon that contains:? A private int data field named numSides that defines the number of sides of thepolygon. The default value should be 4.? A private double data field named sideLength that defines the length of each side. Thedefault value should be 10.0.? A private double data field named xCoord that defines the x-coordinate of the center ofthe polygon. The default value should be 0.0.? A private double data field named yCoord that defines the y-coordinate of the center ofthe polygon. The default value should be 0.0.? A private double data field named apothem that defines the apothem of the polygon.The default value should 5.0.? A private double data filed named perimeter that defines the perimeter of the polygon.The default value should 20.0.? A no argument constructor that creates a Polygon using the default number of sides,default side length, default x- and y-coordinates, and the default apothem.? A constructor that creates a Polygon using a specified number of sides, side length, xandy-coordinates and the apothem? A getArea() method that returns a double value representing the area of the polygon.(Note the area of a regular Polgon can be calculated from ½ * Apothem*Perimeter)? Getter and setter methods for all data fields? A toString() method that displays the number of sides, side length, x-coordinate, ycoordinateand apothem values in String formatBe sure your code compiles.Next, write a Java test program, named TestPolygon, to create five different polygons. Whencreating the five polygons, create one using the no argument constructor. For the remaining four,feel free to use any number of sides, side length and x-, and y-coordinates and apothem that are notequal to the default values and not equal to each other. For each of the five polygons, call all of themethods and display the results. For example for a Polygon with 3 sides, side length of 2.0 and xcoordinateand y-coordinates of 1.0, and apothem of 1.0 the following output may result:toString() results: (numsides=3, sideLength=2.0,xcoord=1.0,ycoord=1.0, apothem=1.0)getNumSides() results: 3getSideLength() results: 2.0getXCoord() results: 1.0getYCoord() results: 1.0getApothem() results:1.0getPerimeter() results: 6.0getArea() results: 3.0setNumSides(4) results: 4


Homework 2

 

Before attempting this project, be sure you have completed all of the reading assignments, hands-on

 

labs, discussions, and assignments to date.

 

(25 points) Design a Java class named Polygon that contains: A private int data field named numSides that defines the number of sides of the

 

polygon. The default value should be 4.

 

A private double data field named sideLength that defines the length of each side. The

 

default value should be 10.0.

 

A private double data field named xCoord that defines the x-coordinate of the center of

 

the polygon. The default value should be 0.0.

 

A private double data field named yCoord that defines the y-coordinate of the center of

 

the polygon. The default value should be 0.0.

 

A private double data field named apothem that defines the apothem of the polygon.

 

The default value should 5.0.

 

A private double data filed named perimeter that defines the perimeter of the polygon.

 

The default value should 20.0.

 

A no argument constructor that creates a Polygon using the default number of sides,

 

default side length, default x- and y-coordinates, and the default apothem.

 

A constructor that creates a Polygon using a specified number of sides, side length, xand y-coordinates and the apothem

 

A getArea() method that returns a double value representing the area of the polygon.

 

(Note the area of a regular Polgon can be calculated from ½ * Apothem*Perimeter)

 

Getter and setter methods for all data fields

 

A toString() method that displays the number of sides, side length, x-coordinate, ycoordinate and apothem values in String format Be sure your code compiles.

 

Next, write a Java test program, named TestPolygon, to create five different polygons. When

 

creating the five polygons, create one using the no argument constructor. For the remaining four,

 

feel free to use any number of sides, side length and x-, and y-coordinates and apothem that are not

 

equal to the default values and not equal to each other. For each of the five polygons, call all of the

 

methods and display the results. For example for a Polygon with 3 sides, side length of 2.0 and xcoordinate and y-coordinates of 1.0, and apothem of 1.0 the following output may result: toString() results: (numsides=3, sideLength=2.0,

 

xcoord=1.0,ycoord=1.0, apothem=1.0)

 

getNumSides() results: 3

 

getSideLength() results: 2.0

 

getXCoord() results: 1.0

 

getYCoord() results: 1.0

 

getApothem() results:1.0

 

getPerimeter() results: 6.0

 

getArea() results: 3.0

 

setNumSides(4) results: 4 1 setSideLength(3) results: 3.0

 

setXCoord(2.0) results: 2.0

 

setYCoord(2.0) results: 2.0

 

setApothem(2.0) results:2.0 Keep in mind, for five Polygons, you will have five different output results. Also, note there is no

 

requirement to actually draw a Polygon.

 

Grading Rubric:

 

In all programming assignments the following grading rubric will be used to determine your grade:

 

Attribute

 

Design (5 points) Functionality (10

 

points) Test cases (5 points) Exceeds

 

(5 points) Meets

 

(3-4 points) Does not meet

 

(0-2 points) Exhibits proper use of

 

parameters, and

 

selection of data types

 

all of the time. Exhibits proper use of

 

parameters, and

 

selection of data types

 

most of the time. Rarely exhibits proper

 

use of parameters, and

 

selection of data types. Employs correct and

 

appropriate use of

 

programming

 

structures (loops,

 

conditionals, classes

 

etc.) all of the time. Employs correct and

 

appropriate use of

 

programming

 

structures (loops,

 

conditionals, classes

 

etc.) most of the time. Rarely employs correct

 

and appropriate use of

 

programming

 

structures (loops,

 

conditionals, classes

 

etc.)

 

Poorly structured and

 

inefficient algorithms. Efficient algorithms

 

used all of the time.

 

(9-10 points) Efficient algorithms

 

used most of the time.

 

(7-8 points) Extra effort was

 

apparent through the

 

addition of significant

 

and additional

 

functionality beyond

 

the scope of the

 

assignment. Program fulfills most

 

functionality. Program does not fulfill

 

functionality. Most requirements

 

were fulfilled. Few requirements

 

were fulfilled. Screen captures

 

provided

 

demonstrating the

 

successful compiling

 

and running of the

 

program.

 

(3-4 points) (0-2 points) (5 points) (0-6 points) Test cases provide

 

comprehensive

 

2 coverage of all code

 

paths.

 

Discussion of run-time

 

errors included. Java Style Guide (5

 

points) (5 points)

 

Code impeccably neat

 

and well-organized.

 

Extensive In-line

 

comments providing

 

additional insight into

 

code design and

 

functionality Test cases provide

 

coverage of most code

 

paths.

 

Test cases results well

 

documented providing

 

pass/fail results for

 

each test case.

 

(3-4 points)

 

Header comments

 

include filename,

 

author, date and brief

 

purpose of the

 

program. No or insufficient test

 

cases

 

Minimal supporting

 

evidence provided to

 

verify testing actually

 

took place.

 

(0-2 points)

 

Code rarely follows

 

recommended Java

 

style guide In-line comments used

 

to describe major

 

functionality of the

 

code.

 

Meaningful variable

 

names and prompts

 

applied.

 

Class names are

 

written in

 

UpperCamelCase.

 

Variable names are

 

written in

 

lowerCamelCase.

 

Constant names are in

 

written in All Capitals.

 

Braces use K&R style. Submission requirements

 

Your deliverables include all Java files (.java) and a single word (or PDF) document. The Java files should

 

be named appropriately for your applications. Your word document should include screen shots

 

showing the successful compiling and running of each application, and a detailed description of the test

 

plan for your application. The test plan should include the input, expected output, actual output and if

 

the test case passed or failed. Submit your files to the Homework 2 assignment area no later than the

 

due date listed in the calendar. You should include your name and HW2 in your word (or PDF) file

 

submitted (e.g. firstnamelastnamehw2.docx or firstnamelastnamehw2.pdf)

 

3

 


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[solution] » Homework 2Before attempting this project, be sure you have completed all of the reading assignmen.zip

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