Java Next - From Amber to Loom, from Panama to Valhalla

on YouTube ↗51m

" summary

Amber shows a concrete proposal for string templates with pluggable template policies that can return parsed SQL or JSON objects (preview aimed at JDK 19/20). Panama delivers a Vector API for SIMD and a foreign memory and function API (FFM preview in JDK 19) for safer off‑heap access and JNI replacement. Valhalla promises value types and primitive classes plus universal/specialized generics to remove boxing. Loom provides virtual threads (create millions cheaply via carrier threads) and enables structured concurrency.

AI-written summary · about

" chapters (7)

1. 0:00Start
2. 14:59Vector API Properties: clear and concise API (given the requirements) • platform agnostic • reliable run-time compilation and performance * graceful degradation
3. 30:49Project Valhalla Value and primitive types plus universal and specialized generics: fewer trade-offs between design and performance . no more manual specializations better performance • can express design more clearly
4. 34:27Continuous Improvements Performance dynamic CDS archives (JEP 350) • default CDS archives 2 (JEP 341) . continuous improvements in all garbage collectors Security context specific deserialization filters (JEP 415) • Edwards-Curve Digital Signature Algorithm (JEP 339) • ongoing enhancements Sean Mullan's blog
5. 40:49Synchronous Align application's unit of concurrency (request) with Java's unit of concurrency (thread)
6. 44:41Virtual Thread Example Remember the hypothetical request 1. interpret request 2. query database (blocks) 3. process data for response In a virtual thread: • runtime submits task to carrier thread pool
7. 48:57Structured Concurrency Structured programming • prescribes single entry point and clearly defined exit points • influenced languages and runtimes Simlarly, structured concurrency prescribes: When the flow of execution splits into multiple concurrent Nows, they rejoin in the some code block

" related talks

• 46mJava Next - From Amber to Loom, from Panama to ValhallaNicolai Parlog · Devoxx France 2022
• 45mJava Next - from Amber to Loom, from Panama to ValhallaNicolai Parlog · Java Day Istanbul 2022
• 47mJava Next - From Amber to Loom, from Panama to ValhallaNicolai Parlog · Voxxed Days Zurich 2023
• 50mJava Next - From Amber to Loom, from Panama to ValhallaNicolai Parlog · J-Fall 2022
• 57mJava Next - From Amber to Valhalla, from Loom to Leyden, from Babylon to PanamaNicolai Parlog · Jfokus 2025
• 01h 00mAmber, Loom, ValhallaJosé Paumard · Devnexus 2023
• 42mJava, Today and TomorrowMark Reinhold · Jfokus 2019
• 21mJVM Language Summit 2023 KeynoteGeorges Saab, Mark Reinhold · JVM Language Summit 2023