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Learn how to scale images and how to rotate and translate images using the AffineTransform class.

Revised: Mon Apr 04 09:24:13 CDT 2016

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Table of contents


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

The program described in this module 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 .

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  • Listing 1 . The driver class named Prob01.
  • Listing 2 . Beginning of the class named Prob01Runner.
  • Listing 3 . The run method.
  • Listing 4 . Beginning of the method named rotatePicture.
  • Listing 5 . Compute the dimensions of the new Picture object.
  • Listing 6 . Prepare the translation transform.
  • Listing 7 . Concatenate the transforms.
  • Listing 8 . Instantiate the new Picture object .
  • Listing 9 . Perform the concatenated transform.
  • Listing 10 . Complete program listing.


In this module, you will learn how to scale images and how to rotate and translate images using the AffineTransform class.

Program specifications

Write a program named Prob01 that uses the class definition shown in Listing 1 and Ericson's media library along with the image file named Prob01.jpg (see Figure 1 ) to produce the output images shown in Figure 2 and Figure 3 .

Figure 1 - Input file named Prob01.jpg.

Image of a beach scene.

Figure 2 - First output image.

Image of the beach scene in a PictureExplorer object.

Figure 3 - Second output image.

Scaled and rotated version of the beach scene.

Scale and rotate

The image from the file named Prob01.jpg must be scaled and then rotated 30 degrees clockwise. A scale factor of 0.95 must be applied to thehorizontal and a scale factor of 0.9 must be applied to the vertical.

New classes

You may define new classes as necessary to cause your program to behave as required, but you may not modify the class definition for the class named Prob01 shown in Listing 1 .

Required output text

In addition to the two output images mentioned above, your program must display your name and the other line of text shown in Figure 4 on the command-line screen.

Figure 4 - Required output text.
Display your name here. Picture, filename None height 360 width 394

General background information

Writing the code from scratch to rotate an image can be a daunting task. However, the task is made much easier through the use of the standard AffineTransform class, which is included in the standard Java library.

Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
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
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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Stoney Reply
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sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
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nano basically means 10^(-9). nanometer is a unit to measure length.
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Damian Reply
absolutely yes
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s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
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Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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