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When you do, a window should appear that looks something like Image 2 where the two animated rectangles move from left to rightacross the screen.

Output from the cars sketch.

Output from the Cars program..
Output from the Cars sketch.

Run in JavaScript mode

Although it isn't easy to see, there is a button in the upper-right corner of the PDE in Image 1 that allows you to select an output mode. (The default output mode is Java.) Assuming that your default browser supports the canvas element in HTML 5, selecting the JavaScript output mode and clicking the run button will cause the sketch output to appear inyour browser as shown in Image 3 . (See the complication involving images.)

Image 3. javascript output mode.

JavaScript output mode.
Image 3. JavaScript output mode.

A folder named web-export

That will also cause a folder named web-export to be created in your Processing sketchbook folder. The web-export folder will contain a file named index.html . Opening that file in your HTML 5 compatible browser will produce the output shown in Image 3 , which is the same output that you should see by clicking here .

A caution regarding JavaScript mode

Not all sketches that can be written in Processing can be successfully run in JavaScript mode. For example, there are two tabs on the references page:

  • Standard Processing
  • JavaScript (Processing.js)

If you examine the contents of those two tabs, you will see that some of the items that appear on the Standard Processing tab are "grayed out" on theJavaScript tab. If you plan to run your sketch in JavaScript mode, you should probably restrict yourself to using only the items on the JavaScript tab.

In addition, the Processing.js Quick Start - Processing Developer Edition page explains a number of restrictions that apply to the JavaScript mode.

Export and run as an application

Finally, selecting Export Application on the File menu, checking the Windows box, and clicking the Export button will cause two additional folders to be created in your sketchbook folder. (Checking Mac OS X or Linux will cause different folders to be created.)

  • application.windows32
  • application.windows64

Those folders contain everything you need to run your sketch as a stand-alone application on the selected platform.

Dealing with image and sound files

Although the sketch in this module doesn't involve image files, sketches in future modules will involve image files and possibly sound files as well.

The PDE expects image files and sound files to be located in a folder named data that is a child of the folder containing the files with the .pde extension. You should make certain that they are located there.

However, (and this is unusual), when writing the Java code, you need to write it as though the image file is in the same folder as the pde file. Inother words, when referring to the file as a string, don't include the path to the data folder.


In this module, I showed you how to create an animated Processing sketch that can be run in any of three ways:

  • Run directly from the PDE.
  • Run in JavaScript mode.
  • Export and run as an application.

Click here to see a live demonstration of the sketch in your HTML 5 compatible browser.

What's next?

In the next module, I will dissect and explain the structural anatomy of the Processing framework.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Pr0100-Getting Started with Processing
  • File: Pr0100.htm
  • Published: 02/25/13

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 topurchase a pre-printed version of the PDF file, you should be aware that some of the HTML elements in this module may not translate well intoPDF.

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.


Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
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
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar 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, The processing programming environment. OpenStax CNX. Feb 26, 2013 Download for free at http://cnx.org/content/col11492/1.5
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