How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask TheDoctor Your Own Question

TheDoctor, Professional w/Adv. Degree
Category: Homework
Satisfied Customers: 1757
Experience:  M.S. in Internet Information Systems
Type Your Homework Question Here...
TheDoctor is online now
A new question is answered every 9 seconds

**For TheDoctor** Overview Consider an application

This answer was rated:

**For TheDoctor**


Consider an application that deals with different two dimensional shapes, we may need to define a circle class, a Polygon class, a Quadrilateral class, and a Rectangle class etc.

All of these classes have some common data property such as color, and common methods such as getting the color and finding the area and perimter of the two dimensional shape. So we can define an abstract super class called TwoDimensionalShape which includes data color, and methods getColor, setColor, and the following abstract methods findArea, findPerimeter, and name (display shape name). Additionally the abstract class TwoDimensionalShape must implement interface Drawable containing a draw method that draws a particular shape. Use JOptionPane to display this message " is being drawn ..."

To define a specific class, we can then extend the TwoDimensionalShape class; and therefore inherit these common features.

The following classes are to be defined:

- Classes Circle and Polygon deriving from TwoDimensionalShape

- Class Quadrilateral deriving from Polygon

- Class Rectangle deriving from Quadrilateral

For each of the 4 concrete classes above (Circle, Polygon, Quadrilateral, and Rectangle) you need to define instance fields for each class and additional instance method(s) besides providing implementation for all the abstract methods in the abstract class TwoDimensionalShape and the draw method of the Drawable interface.

Write a driver to test your classes as follows:

- Create an array of 4 TwoDimensionalShape references

- Create objects of the 4 concrete classes (4 different shapes) and assign to the array

- Use a loop to invoke all methods specified in TwoDimensionalShape (area, perimeter,

name, and getColor)

- Use a different loop to check for the object type and invoke its specific methods

- Define an array of 4 Drawable objects

- Assign the above 4 shapes to the array

- Draw all shapes
Hello again! Thank you for requesting me.

By when do you need this?

Thank you
Customer: replied 2 years ago.

Tonight would be preferred (no specific time) but anytime before tomorrow afternoon would be ok.

Thank you. I will contact you once this is complete.

You need to spend $3 to view this post. Add Funds to your account and buy credits.
TheDoctor, Professional w/Adv. Degree
Category: Homework
Satisfied Customers: 1757
Experience: M.S. in Internet Information Systems
TheDoctor and 3 other Homework Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Previous | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • LogicPro



    Satisfied Customers:

    Expert in Java C++ C C# VB Javascript Design SQL HTML
< Last | Next >
  • LogicPro's Avatar



    Satisfied Customers:

    Expert in Java C++ C C# VB Javascript Design SQL HTML
  • Manal Elkhoshkhany's Avatar

    Manal Elkhoshkhany


    Satisfied Customers:

    More than 5000 online tutoring sessions.
  • Linda_us's Avatar


    Finance, Accounts & Homework Tutor

    Satisfied Customers:

    Post Graduate Diploma in Management (MBA)
  • Chris M.'s Avatar

    Chris M.

    M.S.W. Social Work

    Satisfied Customers:

    Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
  • F. Naz's Avatar

    F. Naz

    Chartered Accountant

    Satisfied Customers:

    Experience with chartered accountancy
  • Bizhelp's Avatar



    Satisfied Customers:

    Bachelors Degree and CPA with Accounting work experience
  • Seanna's Avatar



    Satisfied Customers:

    3,000+ satisfied customers, all topics, A+ work

Related Homework Questions