In this chapter, we covered changes in Java 9 with regards to variable handlers and how they relate to the Atomic Toolkit. We also covered depreciation warnings and why they are now suppressed under specific circumstances. Five enhancements to changes introduced with Java 7 as part of Project Coin were also reviewed. Finally, we explored the improvements to import statement processing.
In the next chapter, we will examine the structure of a Java module as specified by Project Jigsaw. We will take a deep dive into how Project Jigsaw is implemented as part of the Java platform. Code snippets from a sample e-commerce application are used throughout the chapter to demonstrate Java 9's modular system. Internal changes to the Java platform, in regards to the modular system, are also discussed.