The pi4j library is now integrated with the processing IDE on Raspberry Pi, opening doors for integrated code development for front end software and back end hardware control. Processing IDE is one of the easiest IDEs (I have worked on) for development of applications for windows, linux and android. The pi4j library installation carried out as per the guidelines here and here will integrate the accessibility of the GPIO pins on the RPi with the front end software that would be normally developed with processing on RPi. So what can be done with this integration is, one can write a front end software or app, that will access/command the GPIO pins on the RPi. This will open door for rapid development of GUI based embedded systems like kiosks, POS terminals interactive automation systems.
Passionate electronics hobbyist.