processing Using Processing with Alternative Code Editors like Sublime and Atom Using Processing with Eclipse

Example

To use Processing in Eclipse, start by creating a new Java project. Then, select File > Import and then choose General > File System to locate the core.jar file. It can be found in PATH_TO_PROCESSING/core/library/ for Windows or /Applications/Processing 3.app/Contents/Java/core/library/ for Mac. Once this is completed, right-click on core.jar and add it to the build path.

The boilerplate for using Processing in Eclipse is as follows:

import processing.core.PApplet;

public class UsingProcessing extends PApplet {

    // The argument passed to main must match the class name
    public static void main(String[] args) {
        PApplet.main("UsingProcessing");
    }

    // method used only for setting the size of the window
    public void settings(){
        
    }

    // identical use to setup in Processing IDE except for size()
    public void setup(){
        
    }

    // identical use to draw in Prcessing IDE
    public void draw(){

    }
}

The settings() method is used to set the size of the window. For example, to create a 400x400 window, write the following:

 public void settings(){
    size(400,400);   
 }

Everything else as outlined in the Hello World documentation in terms of the use of setup() and draw() applies here.

As a final example, here is the code from the Drawing a Line example were it to be written in Eclipse:

import processing.core.PApplet;

public class UsingProcessing extends PApplet {

    // The argument passed to main must match the class name
    public static void main(String[] args) {
        PApplet.main("UsingProcessing");
    }

    // method for setting the size of the window
    public void settings(){
        size(500, 500);
    }

    // identical use to setup in Processing IDE except for size()
    public void setup(){
        background(0);
        stroke(255);
        strokeWeight(10);
    }

    // identical use to draw in Prcessing IDE
    public void draw(){
        line(0, 0, 500, 500);
    }
}