tar xvf ~/Downloads/processing-4.2-linux-x64.tgz
sudo mv processing-4.2/ /opt/processing
sudo ln -s /opt/processing/processing /usr/local/bin/processing
sudo vim /usr/share/applications/processing.desktop
[Desktop Entry]
Version=2.1
Name=Processing
Comment=Processing Rocks
Exec=processing
Icon=/opt/processing/lib/icons/pde-256.png
Terminal=false
Type=Application
Categories=AudioVideo;Video;Graphics