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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


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.


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



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.


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


This section contains a variety of miscellaneous information.

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

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.


Questions & Answers

how can chip be made from sand
Eke Reply
are nano particles real
Missy Reply
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
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..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
has a lot of application modern world
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
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.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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