Install libprocessing-core-java by entering the following commands in the terminal:
sudo apt update sudo apt install libprocessing-core-java
Description:
Java animation and interaction library
Processing is an open source programming language and environment for people who want to create images, animations, and interactions. . This package provides the core library needed to run such animations.
Homepage: http://www.processing.org
Version: 1.2.1-2
Section: universe/java