More Processing Examples

A set of examples of using the Processing library to create animations and enable interactions in Java.

Technical requirements

This project depends upon the Processing library. The .jar files for this dependency are included within the lib directory.

However, Processing currently works only with Java 8. In order to have the Java Extensions for Visual Studio Code run the program with Java 8, instead of any newer version, you must do the following:

1. Download and install the jdk8u242-b08 version of OpenJDK 8 - on MacOS, select the appropriate .pkg file; for Windows, select the appropriate .msi file (be sure to select the file with jdk in its name, not the one with jre in its name).
2. Note the file path to the directory where this new JDK was installed. We'll refer to this directory later as THE_PATH_TO_JDK_8.
   • On Mac, it is probably in "/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home". Note the inclusiong of Contents/Home at the end of the path - we'll need it with this addition in the settings file.
   • On Windows, it is probably in C:\Program Files (x86)\AdoptOpenJDK\jdk-8.0.242.08-hotspot, which would have to have its back slashes escaped to be "C:\\Program Files (x86)\\AdoptOpenJDK\\jdk-8.0.242.08-hotspot" in the settings file.
3. In Visual Studio Code, go to Settings (MacOS: Code->Preferences->Settings; Windows: File->Preferences->Settings), and enter "java jdt ls java home in the search field. You should see an option with a link to Edit in settings.json - click that link to open that file in the editor.
4. In the settings.json, edit the "java.configuration.runtimes" setting so that it includes the new JDK. If there is no such setting currently, add it. If the setting exists, and an existing JDK is listed there, you an keep both. For example (replace THE_PATH_TO_JDK_8 with the correct path for your newly-installed JDK) :

   "java.configuration.runtimes": [
       {
       "name": "JavaSE-1.8",
       "path": "THE_PATH_TO_JDK_8",
       "default": true
       },
       {
       "name": "JavaSE-15",
       "path": "THE_PATH_TO_AN_EXISTING_JDK",
       "default": false
       }
   ],

5. With this project open, go to Visual Studio Code's Command Palette (View->Command Palette) and search for "Java: Configure Java Runtime". Click on the matching option that appears.
6. In the Configure Java Runtime setting document, click the icon to edit the current runtime setting for this project and change it to the newly-installed JDK.
7. In the Command Palette again (View->Command Palette), search for "Java: Clean Language Server Workspace". Click the matching option that appears and confirm that you would like to reset the Java language server.

At this point, the project should run properly. Try it out.

Folder structure

This project has several important directories:

• images - image files referred to by the code
• src - contains the Java source code for the project (i.e. .java files)
• test - contains code that will help us determine whether the code you have written works correctly. Do not touch this directory!
• bin - contains the compiled code (i.e. .class files)
• lib - contains any dependencies (other libraries of code that the project depends upon to work)

If your project has no dependencies and has not been compiled, you may not see the lib or bin directories.