Raspberry Pi Image
This is the recommended, and easiest way to get started:
Processing 3.4 • Released July 2018
Follow Get Started for instructions how to install this image file.
Install Processing onto existing installation
Alternatively, if you already have an existing installation of Raspbian you want to keep, you can install Processing by running the following in a terminal:
curl https://processing.org/download/install-arm.sh | sudo sh
Lastly, if you are an expert user, and know your way around Linux, you can also manually download and install the compressed archives below. Those also come with a copy of Java built-in.
processing-3.5.3-linux-armv6hf.tgz (95.5 MB)