libbulldog

libbulldog provides a Java API for the Beaglebone Black including the following features:

• Designed for platform independence
• Memory Mapping in Java
• Memory mapped GPIO (toggle speed ~1.8MHz iirc)
• Event driven IO and Interrupts via epoll
• All PWMs simultaneously usable
• I2C fully accessible via Java
• UARTs fully accessible via Java
• SPI working, although you will have to roll your own chip selects
• ADC is mostly working but has got some flaws
• Some devices readily supported (e.g. HD44780 LCD)
• Extensive Servo API with eased movements
• and more ...

Homepage: http://libbulldog.org