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The end of the class

Listing 5 also signals the end of the class named Prob02Runner and the end of the program.

Run the program

I encourage you to copy the code from Listing 6 . Compile the code and execute it. Experiment with the code, making changes, andobserving the results of your changes. Make certain that you can explain why your changes behave as they do.

Click Prob02a.jpg to download the required input image file for this program.

Summary

You learned how to mirror images both horizontally and vertically.

What's next?

In the next module, you will learn to use a variety of Java2D classes including GradientPaint.

While not a requirement of the course, you can select the following link to view an optional online video lecture on the material in this module.

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java OOP: Mirroring Images
  • File: Java3024.htm
  • Published: 08/04/12
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware 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 of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

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

Complete program listing

A complete listing of the program discussed in this module is shown in Listing 6 below.

Listing 6 . Complete program listing.
/*File Prob02 Copyright 2008 R.G.Baldwin *********************************************************/import java.awt.Graphics2D; import java.awt.geom.AffineTransform;import java.awt.geom.Rectangle2D; import java.awt.Graphics;public class Prob02{ //DO NOT MODIFY THE CODE IN THIS CLASS DEFINITION.public static void main(String[] args){new Prob02Runner().run(); }//end main method}//end class Prob02 //======================================================//class Prob02Runner{ public Prob02Runner(){System.out.println("Display your name here."); }//end constructor//----------------------------------------------------// public void run(){Picture pix = new Picture("Prob02a.jpg"); //Add your name and display the output picture.pix.addMessage("Display your name here.",10,20); //Display the input picture.pix.explore(); pix = rotatePicture(pix,35);pix.explore(); pix = mirrorUpperQuads(pix);pix = mirrorHoriz(pix); pix.explore();System.out.println(pix); }//end run//----------------------------------------------------// private Picture rotatePicture(Picture pix,double angle){ //Set up the rotation transformAffineTransform rotateTransform = new AffineTransform();rotateTransform.rotate(Math.toRadians(angle), pix.getWidth()/2,pix.getHeight()/2); //Get the required dimensions of a rectangle that will// contain the rotated image. Rectangle2D rectangle2D =pix.getTransformEnclosingRect(rotateTransform); int resultWidth = (int)(rectangle2D.getWidth());int resultHeight = (int)(rectangle2D.getHeight()); //Set up the translation transform that will translate// the rotated image to the center of the new Picture // object.AffineTransform translateTransform = new AffineTransform();translateTransform.translate( (resultWidth - pix.getWidth())/2,(resultHeight - pix.getHeight())/2); //Concatenate the two transforms so that the image// will first be rotated around its center and then // translated to the center of the new Picture object.translateTransform.concatenate(rotateTransform); //Create a new Picture object to contain the results// of the transformation. Picture result = new Picture(resultWidth,resultHeight); //Get the graphics context of the new Picture object,// apply the transform to the incoming picture and // draw the transformed picture on the new Picture// object. Graphics2D g2 = (Graphics2D)result.getGraphics();g2.drawImage(pix.getImage(),translateTransform,null); return result;}//end rotatePicture //----------------------------------------------------////This method mirrors the upper-left quadrant of a // picture into the upper-right quadrant.private Picture mirrorUpperQuads(Picture pix){ Pixel leftPixel = null;Pixel rightPixel = null; int midpoint = pix.getWidth()/2;int width = pix.getWidth(); for(int row = 0;row<pix.getHeight()/2;row++){ for(int col = 0;col<midpoint;col++){ leftPixel = pix.getPixel(col,row);rightPixel = pix.getPixel(width-1-col,row);rightPixel.setColor(leftPixel.getColor()); }//end inner loop}//end outer loop return pix;}//end mirrorUpperQuads //----------------------------------------------------////This method mirrors the top half of a picture into // the bottom half.private Picture mirrorHoriz(Picture pix){ Pixel topPixel = null;Pixel bottomPixel = null; int midpoint = pix.getHeight()/2;int height = pix.getHeight(); for(int col = 0;col<pix.getWidth();col++){ for(int row = 0;row<midpoint;row++){ topPixel = pix.getPixel(col,row);bottomPixel = pix.getPixel(col,height-1-row);bottomPixel.setColor(topPixel.getColor()); }//end inner loop}//end outer loop return pix;}//end mirrorHoriz //----------------------------------------------------//}//end class Prob02Runner

-end-

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
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Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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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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