openjdk 12 ~ 21 feature

openjdk 11 이후 정체되어있는 나의 나태함에 경각심을 주고자 신규 피처들을 적어본다.

preview, incubator가 정식피처로 올라온 경우 버전표기했다.

 

JDK12

189:	Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
230:	Microbenchmark Suite
325:	Switch Expressions (Preview) => JDK14 Standard
334:	JVM Constants API
340:	One AArch64 Port, Not Two
341:	Default CDS Archives
344:	Abortable Mixed Collections for G1
346:	Promptly Return Unused Committed Memory from G1

 

JDK13

350:	Dynamic CDS Archives
351:	ZGC: Uncommit Unused Memory
353:	Reimplement the Legacy Socket API
354:	Switch Expressions (Preview) => JDK14 Standard
355:	Text Blocks (Preview)=> JDK15

 

JDK14

305:	Pattern Matching for instanceof (Preview)
343:	Packaging Tool (Incubator) => JDK16
345:	NUMA-Aware Memory Allocation for G1
349:	JFR Event Streaming
352:	Non-Volatile Mapped Byte Buffers
358:	Helpful NullPointerExceptions
359:	Records (Preview)
361:	Switch Expressions (Standard)
362:	Deprecate the Solaris and SPARC Ports
363:	Remove the Concurrent Mark Sweep (CMS) Garbage Collector
364:	ZGC on macOS
365:	ZGC on Windows
366:	Deprecate the ParallelScavenge + SerialOld GC Combination
367:	Remove the Pack200 Tools and API
368:	Text Blocks (Second Preview) => JDK15
370:	Foreign-Memory Access API (Incubator)

 

JDK15

339:	Edwards-Curve Digital Signature Algorithm (EdDSA)
360:	Sealed Classes (Preview) => JDK17
371:	Hidden Classes
372:	Remove the Nashorn JavaScript Engine
373:	Reimplement the Legacy DatagramSocket API
374:	Disable and Deprecate Biased Locking
375:	Pattern Matching for instanceof (Second Preview) => JDK16
377:	ZGC: A Scalable Low-Latency Garbage Collector
378:	Text Blocks
379:	Shenandoah: A Low-Pause-Time Garbage Collector
381:	Remove the Solaris and SPARC Ports
383:	Foreign-Memory Access API (Second Incubator)
384:	Records (Second Preview) => JDK16
385:	Deprecate RMI Activation for Removal

 

JDK16

338:	Vector API (Incubator)
347:	Enable C++14 Language Features
357:	Migrate from Mercurial to Git
369:	Migrate to GitHub
376:	ZGC: Concurrent Thread-Stack Processing
380:	Unix-Domain Socket Channels
386:	Alpine Linux Port
387:	Elastic Metaspace
388:	Windows/AArch64 Port
389:	Foreign Linker API (Incubator)
390:	Warnings for Value-Based Classes
392:	Packaging Tool
393:	Foreign-Memory Access API (Third Incubator)
394:	Pattern Matching for instanceof
395:	Records
396:	Strongly Encapsulate JDK Internals by Default
397:	Sealed Classes (Second Preview) => JDK17

 

JDK17

306:	Restore Always-Strict Floating-Point Semantics
356:	Enhanced Pseudo-Random Number Generators
382:	New macOS Rendering Pipeline
391:	macOS/AArch64 Port
398:	Deprecate the Applet API for Removal
403:	Strongly Encapsulate JDK Internals
406:	Pattern Matching for switch (Preview) =>JDK21
407:	Remove RMI Activation
409:	Sealed Classes
410:	Remove the Experimental AOT and JIT Compiler
411:	Deprecate the Security Manager for Removal
412:	Foreign Function & Memory API (Incubator)=>JDK22
414:	Vector API (Second Incubator)
415:	Context-Specific Deserialization Filters

 

JDK18

400:	UTF-8 by Default
408:	Simple Web Server
413:	Code Snippets in Java API Documentation
416:	Reimplement Core Reflection with Method Handles
417:	Vector API (Third Incubator)
418:	Internet-Address Resolution SPI
419:	Foreign Function & Memory API (Second Incubator)=>JDK22
420:	Pattern Matching for switch (Second Preview) =>JDK21
421:	Deprecate Finalization for Removal

 

JDK19

405:	Record Patterns (Preview) => JDK21
422:	Linux/RISC-V Port
424:	Foreign Function & Memory API (Preview)=>JDK22
425:	Virtual Threads (Preview)=>JDK21
426:	Vector API (Fourth Incubator)
427:	Pattern Matching for switch (Third Preview) =>JDK21
428:	Structured Concurrency (Incubator)

 

JDK20

429:	Scoped Values (Incubator)
432:	Record Patterns (Second Preview)=> JDK21
433:	Pattern Matching for switch (Fourth Preview)=>JDK21
434:	Foreign Function & Memory API (Second Preview)=>JDK22
436:	Virtual Threads (Second Preview)=>JDK21
437:	Structured Concurrency (Second Incubator)
438:	Vector API (Fifth Incubator)

 

JDK21

430:	String Templates (Preview)
431:	Sequenced Collections
439:	Generational ZGC
440:	Record Patterns
441:	Pattern Matching for switch
442:	Foreign Function & Memory API (Third Preview) =>JDK22
443:	Unnamed Patterns and Variables (Preview)
444:	Virtual Threads
445:	Unnamed Classes and Instance Main Methods (Preview)
446:	Scoped Values (Preview)
448:	Vector API (Sixth Incubator)
449:	Deprecate the Windows 32-bit x86 Port for Removal
451:	Prepare to Disallow the Dynamic Loading of Agents
452:	Key Encapsulation Mechanism API
453:	Structured Concurrency (Preview)

 

JDK 21 하면 아무래도 virtual thread 가 눈에 띄기 때문에 관련 기술 블로그와 유븁을 링크해본다.

https://tech.kakaopay.com/post/ro-spring-virtual-thread/

[Project Loom] Virtual Thread에 봄(Spring)은 왔는가 | 카카오페이 기술 블로그

https://techblog.woowahan.com/15398/

Java의 미래, Virtual Thread | 우아한형제들 기술블로그

https://www.youtube.com/watch?v=BZMZIM-n4C0

https://tech.payhere.in/post/20240424-virtual-thread/

Virtual Thread 성능 테스트 with JDK21 & Spring boot 3.2