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This lesson explains programs that use a Turtle object to graph a straight line, a parabola, a cubic, a circle, and a cosine. The lesson also shows you how to graph a circle without using a Turtle object and compares the two approaches.

Revised: Wed Jun 29 13:31:10 CDT 2016

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Table of contents

Preface

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

Before embarking on the material in this lesson, you should have studied and should understand all of the material in the lessons identified as Java1600 through Java1630 in the section of this book titled Essence of OOP . You should have studied and should understand the material in the lesson titled Java3002: Creating and Manipulating Turtles and Pictures in a World Object . You should also have studied and should understand all of the material in the following books:

The program described in this lesson 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 lesson in a separate browser window and use the following links to easily find and view the Figuresand Listings while you are reading about them.

Figures

  • Figure 1 . Two turtles in a World object.
  • Figure 2 . Graph of a cubic function.
  • Figure 3 . Program output for Line01.
  • Figure 4 . Line01 output with different scaling.
  • Figure 5 . Program output for Line01 for a 400x150 world.
  • Figure 6 . Graphic output from the program named Parabola01.
  • Figure 7 . Parabola with zero offsets.
  • Figure 8 . A parabola with offsets.
  • Figure 9 . Graphic output from the program named Cubic01.
  • Figure 10 . Graphic output from the program named Circle01.
  • Figure 11 . Graphic output from the program named Circle02.
  • Figure 12 . Graphic output from the program named Cosine01.

Listings

Questions & Answers

what is mutation
Janga Reply
what is a cell
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Sifune
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classification of plants, gymnosperm features.
Linsy Reply
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Linsy
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Samuel
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urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
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Konadu
how is urine formed in human
Rahma
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Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
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Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
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Achiri Reply
in the mouth
EZEKIEL
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stimulates the follicle to release the mature ovum into the oviduct
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endocrine secrete hormone and regulate body process
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Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
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Alfreda
Biology is the study of how living organisms live and survive in a specific environment
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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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