技术 2023年6月9日 星期五
本文罗列了自OpenJDK 10以来各个版本的功能特性，便于追踪某些JEP跨越多个版本的孵化、预览进程。本文将不定期更新，以跟进最新的JEP计划，历史版本不会被保留。
下表中的后缀#代表“孵化”（Incubator），后缀*代表“预览”（Preview）。后缀符号的数量代表孵化/预览的次数，如**代表“第二次预览”（Second Preview）。
| Feature | JDK 10 | 11 (LTS) | 12 | 13 | 14 | 15 | 16 | 17 (LTS) | 18 | 19 | 20 | 21 (LTS) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Scoped Values | 446* | |||||||||||
| Structured Concurrency | 453* | |||||||||||
| Key Encapsulation Mechanism API | 452 | |||||||||||
| Prepare to Disallow the Dynamic Loading of Agents | 451 | |||||||||||
| Deprecate the Windows 32-bit x86 Port for Removal | 449 | |||||||||||
| Unnamed Classes and Instance Main Methods | 445* | |||||||||||
| Unnamed Patterns and Variables | 443* | |||||||||||
| Generational ZGC | 439 | |||||||||||
| Sequenced Collections | 431 | |||||||||||
| String Templates | 430* | |||||||||||
| Scoped Values | 429# | |||||||||||
| Structured Concurrency | 428# | 437## | ||||||||||
| Virtual Threads | 425* | 436** | 444 | |||||||||
| Linux/RISC-V Port | 422 | |||||||||||
| Record Patterns | 405* | 432** | 440 | |||||||||
| Deprecate Finalization for Removal | 421 | |||||||||||
| Internet-Address Resolution SPI | 418 | |||||||||||
| Reimplement Core Reflection with Method Handles | 416 | |||||||||||
| Code Snippets in Java API Documentation | 413 | |||||||||||
| Simple Web Server | 408 | |||||||||||
| UTF-8 by Default | 400 | |||||||||||
| Context-Specific Deserialization Filters | 415 | |||||||||||
| Foreign Function & Memory API | 412# | 419## | 424* | 434** | 442*** | |||||||
| Deprecate the Security Manager for Removal | 411 | |||||||||||
| Remove the Experimental AOT and JIT Compiler | 410 | |||||||||||
| Pattern Matching for switch | 406* | 420** | 427*** | 433**** | 441 | |||||||
| Strongly Encapsulate JDK Internals | 403 | |||||||||||
| Deprecate the Applet API for Removal | 398 | |||||||||||
| macOS/AArch64 Port | 391 | |||||||||||
| New macOS Rendering Pipeline | 382 | |||||||||||
| Enhanced Pseudo-Random Number Generators | 356 | |||||||||||
| Restore Always-Strict Floating-Point Semantics | 306 | |||||||||||
| Strongly Encapsulate JDK Internals by Default | 396 | |||||||||||
| Warnings for Value-Based Classes | 390 | |||||||||||
| Foreign Linker API (Incubator) | 389# | |||||||||||
| Windows/AArch64 Port | 388 | |||||||||||
| Elastic Metaspace | 387 | |||||||||||
| Alpine Linux Port | 386 | |||||||||||
| Unix-Domain Socket Channels | 380 | |||||||||||
| ZGC: Concurrent Thread-Stack Processing | 376 | |||||||||||
| Migrate to GitHub | 369 | |||||||||||
| Migrate from Mercurial to Git | 357 | |||||||||||
| Enable C++14 Language Features | 347 | |||||||||||
| Vector API | 338# | 414## | 417### | 426#### | 438##### | 448###### | ||||||
| Deprecate & Remove RMI Activation for Removal | 385 | 407 | ||||||||||
| Disable and Deprecate Biased Locking | 374 | |||||||||||
| Reimplement the Legacy DatagramSocket API | 373 | |||||||||||
| Remove the Nashorn JavaScript Engine | 372 | |||||||||||
| Hidden Classes | 371 | |||||||||||
| Sealed Classes | 360* | 397** | 409 | |||||||||
| Edwards-Curve Digital Signature Algorithm (EdDSA) | 339 | |||||||||||
| Records | 359* | 384** | 395 | |||||||||
| Foreign-Memory Access API | 370# | 383## | 393### | |||||||||
| Remove the Pack200 Tools and API | 367 | |||||||||||
| Deprecate the ParallelScavenge + SerialOld GC Combination | 366 | |||||||||||
| ZGC on Windows | 365 | |||||||||||
| ZGC on macOS | 364 | |||||||||||
| Remove the Concurrent Mark Sweep (CMS) Garbage Collector | 363 | |||||||||||
| Deprecate & Remove the Solaris and SPARC Ports | 362 | 381 | ||||||||||
| Helpful NullPointerExceptions | 358 | |||||||||||
| Non-Volatile Mapped Byte Buffers | 352 | |||||||||||
| JFR Event Streaming | 349 | |||||||||||
| NUMA-Aware Memory Allocation for G1 | 345 | |||||||||||
| Packaging Tool | 343# | 392 | ||||||||||
| Pattern Matching for instanceof | 305* | 375** | 394 | |||||||||
| Text Blocks | 355* | 368** | 378 | |||||||||
| Reimplement the Legacy Socket API | 353 | |||||||||||
| ZGC: Uncommit Unused Memory | 351 | |||||||||||
| Dynamic CDS Archives | 350 | |||||||||||
| Promptly Return Unused Committed Memory from G1 | 346 | |||||||||||
| Abortable Mixed Collections for G1 | 344 | |||||||||||
| Default CDS Archives | 341 | |||||||||||
| One AArch64 Port, Not Two | 340 | |||||||||||
| JVM Constants API | 334 | |||||||||||
| Switch Expressions | 325* | 354** | 361 | |||||||||
| Microbenchmark Suite | 230 | |||||||||||
| Shenandoah: A Low-Pause-Time Garbage Collector | 189 | 379 | ||||||||||
| Deprecate the Pack200 Tools and API | 336 | |||||||||||
| Deprecate the Nashorn JavaScript Engine | 335 | |||||||||||
| ZGC: A Scalable Low-Latency Garbage Collector | 333 | 377 | ||||||||||
| Transport Layer Security (TLS) 1.3 | 332 | |||||||||||
| Low-Overhead Heap Profiling | 331 | |||||||||||
| Launch Single-File Source-Code Programs | 330 | |||||||||||
| ChaCha20 and Poly1305 Cryptographic Algorithms | 329 | |||||||||||
| Flight Recorder | 328 | |||||||||||
| Unicode 10 | 327 | |||||||||||
| Key Agreement with Curve25519 and Curve448 | 324 | |||||||||||
| Local-Variable Syntax for Lambda Parameters | 323 | |||||||||||
| HTTP Client (Standard) | 321 | |||||||||||
| Remove the Java EE and CORBA Modules | 320 | |||||||||||
| Epsilon: A No-Op Garbage Collector | 318 | |||||||||||
| Improve Aarch64 Intrinsics | 315 | |||||||||||
| Dynamic Class-File Constants | 309 | |||||||||||
| Nest-Based Access Control | 181 | |||||||||||
| Time-Based Release Versioning | 322 | |||||||||||
| Root Certificates | 319 | |||||||||||
| Experimental Java-Based JIT Compiler | 317 | |||||||||||
| Heap Allocation on Alternative Memory Devices | 316 | |||||||||||
| Additional Unicode Language-Tag Extensions | 314 | |||||||||||
| Remove the Native-Header Generation Tool (javah) | 313 | |||||||||||
| Thread-Local Handshakes | 312 | |||||||||||
| Application Class-Data Sharing | 310 | |||||||||||
| Parallel Full GC for G1 | 307 | |||||||||||
| Garbage-Collector Interface | 304 | |||||||||||
| Consolidate the JDK Forest into a Single Repository | 296 | |||||||||||
| Local-Variable Type Inference | 286 |