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This module contains review questions and answers keyed to the module titled Java3026: GradientPaint and other Java2D Classes.

Revised: Mon Apr 04 10:22:57 CDT 2016

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Table of contents

Preface

This module contains review questions and answers keyed to the module titled Java3026: GradientPaint and other Java2D Classes .

The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.

Questions

Question 1 .

Which of the following output images is produced by the program shown in Listing 1 ?

A. Figure 1

B. Figure 2

Listing 1 . Question 1 .
/*File Java3026ra Copyright 2013 R.G.Baldwin *********************************************************/import java.awt.geom.Line2D; import java.awt.geom.Ellipse2D;import java.awt.Color; import java.awt.Graphics;import java.awt.Graphics2D; import java.awt.GradientPaint;public class Java3026ra{ public static void main(String[]args){ new Java3026raRunner().run();}//end main method }//end class Java3026ra//======================================================// class Java3026raRunner{public void run(){ Picture pic = new Picture(300,300);pic.setAllPixelsToAColor(Color.RED); process(pic);pic.explore(); }//end run//----------------------------------------------------// private void process(Picture pic){Graphics2D g2 = (Graphics2D)(pic.getGraphics()); int width = pic.getWidth();int height = pic.getHeight(); g2.translate(width/2,height/2);g2.setColor(Color.BLACK); g2.draw(new Line2D.Double(-width/2,0.0,width/2,0.0));g2.draw(new Line2D.Double(0.0,-width/2,0.0,height/2)); Ellipse2D.Double circle1 =new Ellipse2D.Double(-128,-128,128,128); g2.setPaint(new GradientPaint(-64,-64,Color.BLUE,-32,-32,Color.GREEN,true)); g2.fill(circle1);g2.draw(circle1); Ellipse2D.Double circle2 =new Ellipse2D.Double(0.0,-128,128,128); g2.fill(circle2);g2.draw(circle2); Ellipse2D.Double circle3 =new Ellipse2D.Double(-128,0.0,128,128); g2.fill(circle3);g2.draw(circle3); Ellipse2D.Double circle4 =new Ellipse2D.Double(0,0,128,128); g2.fill(circle4);g2.draw(circle4); }//end process}//end class Java3026raRunner

Figure 1 - Possible output image.

Possible output image from the program in Listing 1.

Figure 2 - Possible output image.

Possible output image from the program in Listing 1.

Answer 1

Figures

Listings

What is the meaning of the following two images?

This image was inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

The image is also an example of the kinds of things that we do in my course titled ITSE 2321, Object-Oriented Programming.

Spacer image of a rabbit and a penguin.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Spacer image of a penguin in the snow in front of some houses.

Answers

Answer 1

The code in Listing 1 produces the output image shown in Figure 1 .

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java3026r Review
  • File: Java3026r.htm
  • Published: 02/18/13
Disclaimers:

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I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
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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