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Learn how to create and manipulate Turtle objects and Picture objects in a World object using the Guzdial-Ericson multimedia library.

Revised: Sat Apr 02 13:20:42 CDT 2016

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Table of contents

Preface

This module is one of a series of modules designed to teach you about Object-Oriented Programming (OOP) using Java.

Before embarking on the material in this module, you should have studied and should understand all of the material in the modules identified as Java1600 through Java1630 in the section of this book titled Essence of OOP and you should have studied and should understand allof the material in the following books:

The program described in this module requires the use of the Guzdial-Ericson multimedia class library. You will find download, installation, and usageinstructions for the library at Java OOP: The Guzdial-Ericson Multimedia Class Library .

Viewing tip

I recommend that you open another copy of this document in a separate browser window and use the following links to easily find and view the Figures and Listings while you are reading about them.

Figures

  • Figure 1 . Graphic screen output.
  • Figure 2 . Command-line output.
  • Figure 3 . Commands to compile and execute the application.
  • Figure 4 . Constructors for the World class.
  • Figure 5 . Constructors for the Turtle class.
  • Figure 6 . Constructors for the Picture class.

Listings

Preview

In this module, I will explain a program that uses Java and Ericson's media library to (see Figure 1 ) :

  • Add a picture and two turtles to a world.
  • Manipulate the turtles, their colors, and their pens.

Stated in more detail, the program will:

  • Create a Picture object from an image file and replace the default white Picture in a World object with the new Picture object.
  • Place two Turtle objects in a World object.
  • Apply a series of operations to manipulate the two turtle objects so as to produce a specific graphic output.
  • Provide accessor methods to get references to two Turtle objects and the World object.
  • Use the references to get information from the World and Turtle objects and display that information on the command-line screen.
  • Display text on a Picture in a World object.

Program output

Figure 1 shows the graphic screen output produced by this program.

Figure 1 - Graphic screen output.

Image of two turtles maneuvering in front of a background image.

Figure 2 shows the text output produced by the program on the command line screen.

Figure 2 . Command-line output.
javac 1.6.0_14 java version "1.6.0_14"Java(TM) SE Runtime Environment (build 1.6.0_14-b08) Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode,sharing) Dick Baldwin.A 300 by 274 world with 2 turtles in it. joe turtle at 44, 143 heading -135.0.sue turtle at 250, 237 heading 0.0.

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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