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Exploring Processing: Integrating Java for Advanced Graphics and Interactivity

Processing, a flexible software sketchbook and language for learning how to code within the context of the visual arts, offers an array of utilities that extend its functionality. Key features include drawing functions, text and font manipulations, 3D transformations, image/video integration, and keyboard interactions. By comparing generated Java programs with Processing sketches, users can discover nuances such as encapsulation of code in subclasses, explicit visibility modifiers, and various number formats. Dive into the relationship between Processing and Java to unlock advanced programming capabilities!

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Exploring Processing: Integrating Java for Advanced Graphics and Interactivity

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  1. Processing == Java + Extra Utilities Processing Adds: • Drawing functions • Text and font manipulations • Image and video • 3D transformations • Keyboard interaction • An editor • …

  2. Best way to see what Processing becomes is to generate a Java program and compare • File | Export • Look in generated applet folder

  3. What's different? • Import of core Processing libraries • Import of numerous Java libraries • Encapsulation of code in subclass of PApplet • Explicit visibility – public, private … • Number format changes if (random(1.0) < 0.5) -> if (random(1.0f) < 0.5f) • color data types are converted to int • Some functions are changed numbers = int(snumbers); -> numbers = PApplet.parseInt(snumbers); • Added public static void main() {…

  4. The smallest program in Processing println("Hello World!"); All Java programs start with at the special function … public static void main() { … The equivalent program in Java. class HelloWorldApp { public static void main(String[] args) { // Display the string. System.out.println("Hello World!"); } } This must be added to the generated Java program

  5. PApplet • The top-level class in Processing • The class in which all your Processing code goes • Implements most of Processing's core behavior • Way down the Java hierarchy • java.lang.Object • ↘ java.awt.Component • ↘ java.awt.Container • ↘ java.awt.Panel • ↘ java.applet.Applet • ↘ processing.core.PApplet http://processing.googlecode.com/svn/trunk/processing/build/javadoc/core/processing/core/PApplet.html

  6. Nearly all of Java is available from Processing http://download.oracle.com/javase/6/docs/api/

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