IoT

Portable devices that feature Internet connectivity are very common these days. Since Java was created with the idea of running on embedded devices from the beginning, JVM is, yet again, at an advantage here.

For memory-constrained systems, Oracle offers the Java ME Embedded platform. It is meant for commercial IoT devices that do not require a standard graphical or console-based user interface.

For devices that can spare more memory, the Java SE Embedded edition is available. The Java SE Embedded version is very close to the Java SE discussed in this book. When running a full Linux environment, it can be used to provide desktop GUIs for full user interaction.

Both Java ME Embedded and Java SE Embedded platforms can access the general-purpose input/output (GPIO) pins on the Raspberry Pi, which means that sensors and other peripherals connected to these ports can be accessed by Java code.