Java Foreign Function & Memory API

Let us peer into the future of Java with the Foreign Function and Memory Interface, the new way to interact with native code. This session will discuss the essential ingredients of creating a Java-based application that issues commands and reads from the underlying native code and libraries. We will discuss establishing memory arenas, establishing pointers, making download calls, and using upcall stubs. This presentation will be rich with actual code examples. We will conclude by discussing the eventual removal of JNI, the old Java Native Interface

In this session, we will describe each of the following features of the Foreign Function and Memory API, along with Kata demos that you can run.

  • Establishing an Arena
  • Creating a Linker
  • Downcall Handles
  • Method and Variable Handle
  • Describing Functions
  • Dealing with Pointers as Parameters and as Return Values
  • Upcall Handles
  • Restricted Methods
  • Using jextract
  • Linking to something other than C with a Demo using Rust

Daniel Hinojosa

About Daniel Hinojosa

Daniel is a programmer, consultant, instructor, speaker, and recent author. With over 20 years of experience, he does work for private, educational, and government institutions. He is also currently a speaker for No Fluff Just Stuff tour. Daniel loves JVM languages like Java, Groovy, and Scala; but also dabbles with non JVM languages like Haskell, Ruby, Python, LISP, C, C++. He is an avid Pomodoro Technique Practitioner and makes every attempt to learn a new programming language every year. For downtime, he enjoys reading, swimming, Legos, football, and barbecuing.

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