Project Jigsaw will bring modularity to the Java platform; something that will enable better security, performance and flexibility for deployment of applications. This talk will look at the fundamentals of how modularity in Java will work. Developers will need to understand that these changes go significantly further than just separating the standard class libraries into a number of discrete units. In addition we’ll explain the impact project Jigsaw will have on developers in terms of building their applications, as well as helping them to understand how things like encapsulation will change in JDK 9. We¹ll conclude with a look at how this will simplify and improve Java as a platform for IoT applications and how this relates to Project Zulu from Azul.