The Internet of Things (IoT) is a technology that has made a huge impact in the recent years and an increasing number of businesses are inclined towards investing in IoT-powered applications. As the popularity of smart devices surges, there is a constant debate over the choice of the programming languages to be used for building such applications. The languages used for this purpose are same as the ones used for writing the conventional desktop apps. This similarity is quite surprising, considering the fact that IoT-based apps are far more complex in comparison to the basic desktop applications. Let us list the most popular programming languages for rendering exceptional IoT applications.

Java
Java, the “write once, run anywhere” language, has emerged as the top choice in this context. The reason that Java Development has gained extensive popularity in the IoT space is that it enables the developers in creating and debugging the code on their desktops and later transfer it to any chip with a Java Virtual Machine. Consequently, the code can run not only on places with common JVMs, but also on the smallest machines as well. This means that the language is not confined by any hardware limitations; it is apt for moving the code to smaller, embedded devices. It comes as no surprise that several organizations have opted to hire Java developers for their IoT projects.
Source: http://www.javaindia.in/blog/5-programming-languages-for-building-exceptional-iot-applications/