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This module contains review questions and answers keyed to the module titled Java3014: Cropping, Flipping, and Combining Pictures.

Revised: Sun Apr 03 12:08:03 CDT 2016

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Table of contents

Preface

This module contains review questions and answers keyed to the module titled Java3014: Cropping, Flipping, and Combining Pictures .

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 .

True or False? The code in Listing 1 combined with the images in Figure 1 and Figure 2 produces the output shown in Figure 3 .

Listing 1 . Question 1 .
/*File Java3014ra Copyright 2013 R.G.Baldwin Revised 02/15/13*********************************************************/ import java.awt.Color;public class Java3014ra{ public static void main(String[]args){ Picture[]pictures = new Java3014raRunner().run(); }//end main method}//end class Java3014ra //======================================================//class Java3014raRunner{ public Picture[]run(){ Picture picA = new Picture("Prob02a.jpg");Picture picB = new Picture("Prob02b.jpg"); Picture picC = cropAndFlip(picA,4,5,80,105);copyPictureWithCrop(picA,picB,130,10,4,5,77,101); copyPictureWithCrop(picC,picB,130,120,0,0,77,101);picB.explore(); Picture[]output = {picA,picB,picC}; return output;}//end run //----------------------------------------------------////Crops a picture to the specified coordinate values and // flips it around a vertical line at its center.private Picture cropAndFlip(Picture pic,int x1,int y1, int x2,int y2){Picture output = new Picture(x2-x1+1,y2-y1+1); int width = output.getWidth();Pixel pixel = null; Color color = null;for(int col = x1;col<(x2+1);col++){ for(int row = y1;row<(y2+1);row++){ color = pic.getPixel(col,row).getColor();pixel = output.getPixel(width-col+x1-1,row-y1); pixel.setColor(color);}//end inner loop }//end outer loopreturn output; }//end crop and flip//----------------------------------------------------// //Copies part of the source picture into the destination// picture with an offset on both axes after first // confirming that the part will fit. Does nothing if it// won't fit. private void copyPictureWithCrop(Picture source,Picture dest,int xOff, int yOff,int xCoor, int yCoor,int width, int height){//Confirm that source will fit in destination if(((width+xOff)<= dest.getWidth())&&((height+yOff)<= dest.getHeight())){ Pixel pixel = null;Color color = null; for(int col = 0;col<width;col++){ for(int row = 0;row<height;row++){ color = source.getPixel(col + xCoor,row + yCoor).getColor(); pixel = dest.getPixel(col+xOff,row+yOff); pixel.setColor(color);}//end inner loop }//end outer loop}//end if }//end copyPictureWithCrop method}//end class Java3014raRunner

Figure 1 - Prob02a.jpg.

This is an image of a butterfly.

Figure 2 - Prob02b.jpg.

This is an image of a beach scene.

Figure 3 - Possible output image.

Possible output image from the program shown in Listing 1.

Answer 1

Question 2

True or False? The call to the run method in Listing 2 returns a reference to an object of the class Picture .

Listing 2 . Question 2.
Picture[] pictures = new Java3014raRunner().run();

Answer 2

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 2

False. The call to the run method in Listing 2 returns a reference to an array object whose elements may or may not containreferences to objects of the class Picture (or some subclass of the class Picture ) . However, since array objects in Java may have a length of 0, without seeing the source code for the run method, it is impossible to know what is contained in the array object.

Back to Question 2

Answer 1

False. The code in Listing 1 combined with the images in Figure 1 and Figure 2 produces the output shown in Figure 4 .

Figure 4 - Answer 1.

Actual output image from code in Listing 1.

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java3014r Review
  • File: Java3014r.htm
  • Published: 02/15/13
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.

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

how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris 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
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
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
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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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