java document from java 24 to java 12

Author: JavaProgrammerLB

README.md

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+# [Java 24](https://openjdk.org/projects/jdk/24/)
+- JEP404: [Generational Shenandoah (Experimental)](https://openjdk.org/jeps/404)
+- JEP450: [Compact Object Headers (Experimental)](https://openjdk.org/jeps/450)
+- JEP472: [Prepare to Restrict the Use of JNI](https://openjdk.org/jeps/472)
+- JEP475: [Late Barrier Expansion for G1](https://openjdk.org/jeps/475)
+- JEP478: [Key Derivation Function API (Preview)](https://openjdk.org/jeps/478)
+- JEP479: [Remove the Windows 32-bit x86 Port](https://openjdk.org/jeps/479)
+- JEP483: [Ahead-of-Time Class Loading & Linking](https://openjdk.org/jeps/483)
+- JEP484: [Class-File API](https://openjdk.org/jeps/484)
+- JEP485: [Stream Gatherers](https://openjdk.org/jeps/485)
+- JEP486: [Permanently Disable the Security Manager](https://openjdk.org/jeps/486)
+- JEP487: [Scoped Values (Fourth Preview)](https://openjdk.org/jeps/487)
+- JEP488: [Primitive Types in Patterns, instanceof, and switch (Second Preview)](https://openjdk.org/jeps/488)
+- JEP489: [Vector API (Ninth Incubator)](https://openjdk.org/jeps/489)
+- JEP490: [ZGC: Remove the Non-Generational Mode](https://openjdk.org/jeps/490)
+- JEP491: [Synchronize Virtual Threads without Pinning](https://openjdk.org/jeps/491)
+- JEP492: [Flexible Constructor Bodies (Third Preview)](https://openjdk.org/jeps/492)
+- JEP493: [Linking Run-Time Images without JMODs](https://openjdk.org/jeps/493)
+- JEP494: [Module Import Declarations (Second Preview)](https://openjdk.org/jeps/494)
+- JEP495: [Simple Source Files and Instance Main Methods (Fourth Preview)](https://openjdk.org/jeps/495)
+- JEP496: [Quantum-Resistant Module-Lattice-Based Key Encapsulation Mechanism](https://openjdk.org/jeps/496)
+- JEP497: [Quantum-Resistant Module-Lattice-Based Digital Signature Algorithm](https://openjdk.org/jeps/497)
+- JEP498: [Warn upon Use of Memory-Access Methods in sun.misc.Unsafe](https://openjdk.org/jeps/498)
+- JEP499: [Structured Concurrency (Fourth Preview)](https://openjdk.org/jeps/499)
+- JEP501: [Deprecate the 32-bit x86 Port for Removal](https://openjdk.org/jeps/501)
+
+# [Java 23](https://openjdk.org/projects/jdk/23/)
+- JEP455: [Primitive Types in Patterns, instanceof, and switch (Preview)](https://openjdk.org/jeps/455)
+- JEP466: [Class-File API (Second Preview)](https://openjdk.org/jeps/466)
+- JEP467: [Markdown Documentation Comments](https://openjdk.org/jeps/467)
+- JEP469: [Vector API (Eighth Incubator)](https://openjdk.org/jeps/469)
+- JEP473: [Stream Gatherers (Second Preview)](https://openjdk.org/jeps/473)
+- JEP471: [Deprecate the Memory-Access Methods in sun.misc.Unsafe for Removal](https://openjdk.org/jeps/471)
+- JEP474: [ZGC: Generational Mode by Default](https://openjdk.org/jeps/474)
+- JEP476: [Module Import Declarations (Preview)](https://openjdk.org/jeps/476)
+- JEP477: [Implicitly Declared Classes and Instance Main Methods (Third Preview)](https://openjdk.org/jeps/477)
+- JEP480: [Structured Concurrency (Third Preview)](https://openjdk.org/jeps/480)
+- JEP481: [Scoped Values (Third Preview)](https://openjdk.org/jeps/481)
+- JEP482: [Flexible Constructor Bodies (Second Preview)](https://openjdk.org/jeps/482)
+
+# [Java 22](https://openjdk.org/projects/jdk/22/)
+- JEP423: [Region Pinning for G1](https://openjdk.org/jeps/423)
+- JEP447: [Statements before super(...) (Preview)](https://openjdk.org/jeps/447)
+- JEP454: [Foreign Function & Memory API](https://openjdk.org/jeps/454)
+- JEP456: [Unnamed Variables & Patterns](https://openjdk.org/jeps/456)
+- JEP457: [Class-File API (Preview)](https://openjdk.org/jeps/457)
+- JEP458: [Launch Multi-File Source-Code Programs](https://openjdk.org/jeps/458)
+- JEP459: [String Templates (Second Preview)](https://openjdk.org/jeps/459)
+- JEP460: [Vector API (Seventh Incubator)](https://openjdk.org/jeps/460)
+- JEP461: [Stream Gatherers (Preview)](https://openjdk.org/jeps/461)
+- JEP462: [Structured Concurrency (Second Preview)](https://openjdk.org/jeps/462)
+- JEP463: [Implicitly Declared Classes and Instance Main Methods (Second Preview)](https://openjdk.org/jeps/463)
+- JEP464: [Scoped Values (Second Preview)](https://openjdk.org/jeps/464)
+
+# [Java 21](https://openjdk.org/projects/jdk/21/)
+- JEP430: [String Templates (Preview)](https://openjdk.org/jeps/430)
+- JEP431: [Sequenced Collections](https://openjdk.org/jeps/431)
+- JEP439: [Generational ZGC](https://openjdk.org/jeps/439)
+- JEP440: [Record Patterns](https://openjdk.org/jeps/440)
+- JEP441: [Pattern Matching for switch](https://openjdk.org/jeps/441)
+- JEP442: [Foreign Function & Memory API (Third Preview)](https://openjdk.org/jeps/442)
+- JEP443: [Unnamed Patterns and Variables (Preview)](https://openjdk.org/jeps/443)
+- JEP444: [Virtual Threads](https://openjdk.org/jeps/444)
+- JEP445: [Unnamed Classes and Instance Main Methods (Preview)](https://openjdk.org/jeps/445)
+- JEP446: [Scoped Values (Preview)](https://openjdk.org/jeps/446)
+- JEP448: [Vector API (Sixth Incubator)](https://openjdk.org/jeps/448)
+- JEP449: [Deprecate the Windows 32-bit x86 Port for Removal](https://openjdk.org/jeps/449)
+- JEP451: [Prepare to Disallow the Dynamic Loading of Agents](https://openjdk.org/jeps/451)
+- JEP452: [Key Encapsulation Mechanism API](https://openjdk.org/jeps/452)
+- JEP453: [Structured Concurrency (Preview)](https://openjdk.org/jeps/453)
+
+# [Java 20](https://openjdk.org/projects/jdk/20/)
+- JEP429: [Scoped Values (Incubator)](https://openjdk.org/jeps/429)
+- JEP432: [Record Patterns (Second Preview)](https://openjdk.org/jeps/432)
+- JEP433: [Pattern Matching for switch (Fourth Preview)](https://openjdk.org/jeps/433)
+- JEP434: [Foreign Function & Memory API (Second Preview)](https://openjdk.org/jeps/434)
+- JEP436: [Virtual Threads (Second Preview)](https://openjdk.org/jeps/436)
+- JEP437: [Structured Concurrency (Second Incubator)](https://openjdk.org/jeps/437)
+- JEP438: [Vector API (Fifth Incubator)](https://openjdk.org/jeps/438)
+
+# [Java 19](https://openjdk.org/projects/jdk/19/)
+- JEP405: [Record Patterns (Preview)](https://openjdk.org/jeps/405)
+- JEP422: [Linux/RISC-V Port](https://openjdk.org/jeps/422)
+- JEP424: [Foreign Function & Memory API (Preview)](https://openjdk.org/jeps/424)
+- JEP425: [Virtual Threads (Preview)](https://openjdk.org/jeps/425)
+- JEP426: [Vector API (Fourth Incubator)](https://openjdk.org/jeps/426)
+- JEP427: [Pattern Matching for switch (Third Preview)](https://openjdk.org/jeps/427)
+- JEP428: [Structured Concurrency (Incubator)](https://openjdk.org/jeps/428)
+
+# [Java 18](https://openjdk.org/projects/jdk/18/)
+- JEP400: [UTF-8 by Default](https://openjdk.org/jeps/400)
+- JEP408: [Simple Web Server](https://openjdk.org/jeps/408)
+- JEP413: [Code Snippets in Java API Documentation](https://openjdk.org/jeps/413)
+- JEP416: [Reimplement Core Reflection with Method Handles](https://openjdk.org/jeps/416)
+- JEP417: [Vector API (Third Incubator)](https://openjdk.org/jeps/417)
+- JEP418: [Internet-Address Resolution SPI](https://openjdk.org/jeps/418)
+- JEP419: [Foreign Function & Memory API (Second Incubator)](https://openjdk.org/jeps/419)
+- JEP420: [Pattern Matching for switch (Second Preview)](https://openjdk.org/jeps/420)
+- JEP421: [Deprecate Finalization for Removal](https://openjdk.org/jeps/421)
+
+# [Java 17](https://openjdk.org/projects/jdk/17/)
+- JEP306: [Restore Always-Strict Floating-Point Semantics](https://openjdk.org/jeps/306)
+- JEP356: [Enhanced Pseudo-Random Number Generators](https://openjdk.org/jeps/356)
+- JEP382: [New macOS Rendering Pipeline](https://openjdk.org/jeps/382)
+- JEP391: [macOS/AArch64 Port](https://openjdk.org/jeps/391)
+- JEP398: [Deprecate the Applet API for Removal](https://openjdk.org/jeps/398)
+- JEP403: [Strongly Encapsulate JDK Internals](https://openjdk.org/jeps/403)
+- JEP406: [Pattern Matching for switch (Preview)](https://openjdk.org/jeps/406)
+- JEP407: [Remove RMI Activation](https://openjdk.org/jeps/407)
+- JEP409: [Sealed Classes](https://openjdk.org/jeps/409)
+- JEP410: [Remove the Experimental AOT and JIT Compiler](https://openjdk.org/jeps/410)
+- JEP411: [Deprecate the Security Manager for Removal](https://openjdk.org/jeps/411)
+- JEP412: [Foreign Function & Memory API (Incubator)](https://openjdk.org/jeps/412)
+- JEP414: [Vector API (Second Incubator)](https://openjdk.org/jeps/414)
+- JEP415: [Context-Specific Deserialization Filters](https://openjdk.org/jeps/415)
+
+# [Java 16](https://openjdk.org/projects/jdk/16/)
+- JEP338: [Vector API (Incubator)](https://openjdk.org/jeps/338)
+- JEP347: [Enable C++14 Language Features](https://openjdk.org/jeps/347)
+- JEP357: [Migrate from Mercurial to Git](https://openjdk.org/jeps/357)
+- JEP369: [Migrate to GitHub](https://openjdk.org/jeps/369)
+- JEP376: [ZGC: Concurrent Thread-Stack Processing](https://openjdk.org/jeps/376)
+- JEP380: [Unix-Domain Socket Channels](https://openjdk.org/jeps/380)
+- JEP386: [Alpine Linux Port](https://openjdk.org/jeps/386)
+- JEP387: [Elastic Metaspace](https://openjdk.org/jeps/387)
+- JEP388: [Windows/AArch64 Port](https://openjdk.org/jeps/388)
+- JEP389: [Foreign Linker API (Incubator)](https://openjdk.org/jeps/389)
+- JEP390: [Warnings for Value-Based Classes](https://openjdk.org/jeps/390)
+- JEP392: [Packaging Tool](https://openjdk.org/jeps/392)
+- JEP393: [Foreign-Memory Access API (Third Incubator)](https://openjdk.org/jeps/393)
+- JEP394: [Pattern Matching for instanceof](https://openjdk.org/jeps/394)
+- JEP395: [Records](https://openjdk.org/jeps/395)
+- JEP396: [Strongly Encapsulate JDK Internals by Default](https://openjdk.org/jeps/396)
+- JEP397: [Sealed Classes (Second Preview)](https://openjdk.org/jeps/397)
+
+# [Java 15](https://openjdk.org/projects/jdk/15/)
+- JEP339: [Edwards-Curve Digital Signature Algorithm (EdDSA)](https://openjdk.org/jeps/339)
+- JEP360: [Sealed Classes (Preview)](https://openjdk.org/jeps/360)
+- JEP371: [Hidden Classes](https://openjdk.org/jeps/371)
+- JEP372: [Remove the Nashorn JavaScript Engine](https://openjdk.org/jeps/372)
+- JEP373: [Reimplement the Legacy DatagramSocket API](https://openjdk.org/jeps/373)
+- JEP374: [Disable and Deprecate Biased Locking](https://openjdk.org/jeps/374)
+- JEP375: [Pattern Matching for instanceof (Second Preview)](https://openjdk.org/jeps/375)
+- JEP377: [ZGC: A Scalable Low-Latency Garbage Collector](https://openjdk.org/jeps/377)
+- JEP378: [Text Blocks](https://openjdk.org/jeps/378)
+- JEP379: [Shenandoah: A Low-Pause-Time Garbage Collector](https://openjdk.org/jeps/379)
+- JEP381: [Remove the Solaris and SPARC Ports](https://openjdk.org/jeps/381)
+- JEP383: [Foreign-Memory Access API (Second Incubator)](https://openjdk.org/jeps/383)
+- JEP384: [Records (Second Preview)](https://openjdk.org/jeps/384)
+- JEP385: [Deprecate RMI Activation for Removal](https://openjdk.org/jeps/385)
+
+# [Java 14](https://openjdk.org/projects/jdk/14/)
+- JEP305: [Pattern Matching for instanceof (Preview)](https://openjdk.org/jeps/305)
+- JEP343: [Packaging Tool (Incubator)](https://openjdk.org/jeps/343)
+- JEP345: [NUMA-Aware Memory Allocation for G1](https://openjdk.org/jeps/345)
+- JEP349: [JFR Event Streaming](https://openjdk.org/jeps/349)
+- JEP352: [Non-Volatile Mapped Byte Buffers](https://openjdk.org/jeps/352)
+- JEP358: [Helpful NullPointerExceptions](https://openjdk.org/jeps/358)
+- JEP359: [Records (Preview)](https://openjdk.org/jeps/359)
+- JEP361: [Switch Expressions (Standard)](https://openjdk.org/jeps/361)
+- JEP362: [Deprecate the Solaris and SPARC Ports](https://openjdk.org/jeps/362)
+- JEP363: [Remove the Concurrent Mark Sweep (CMS) Garbage Collector](https://openjdk.org/jeps/363)
+- JEP364: [ZGC on macOS](https://openjdk.org/jeps/364)
+- JEP365: [ZGC on Windows](https://openjdk.org/jeps/365)
+- JEP366: [Deprecate the ParallelScavenge + SerialOld GC Combination](https://openjdk.org/jeps/366)
+- JEP367: [Remove the Pack200 Tools and API](https://openjdk.org/jeps/367)
+- JEP368: [Text Blocks (Second Preview)](https://openjdk.org/jeps/368)
+- JEP370: [Foreign-Memory Access API (Incubator)](https://openjdk.org/jeps/370)
+
+# [Java 13](https://openjdk.org/projects/jdk/13/)
+- JEP350: [Dynamic CDS Archives](https://openjdk.org/jeps/350)
+- JEP351: [ZGC: Uncommit Unused Memory](https://openjdk.org/jeps/351)
+- JEP353: [Reimplement the Legacy Socket API](https://openjdk.org/jeps/353)
+- JEP354: [Switch Expressions (Preview)](https://openjdk.org/jeps/354)
+- JEP355: [Text Blocks (Preview)](https://openjdk.org/jeps/355)
+
+# [Java 12](https://openjdk.org/projects/jdk/12/)
+- JEP189: [Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)](https://openjdk.org/jeps/189)
+- JEP230: [Microbenchmark Suite](https://openjdk.org/jeps/230)
+- JEP325: [Switch Expressions (Preview)](https://openjdk.org/jeps/325)
+- JEP334: [JVM Constants API](https://openjdk.org/jeps/334)
+- JEP340: [One AArch64 Port, Not Two](https://openjdk.org/jeps/340)
+- JEP341: [Default CDS Archives](https://openjdk.org/jeps/341)
+- JEP344: [Abortable Mixed Collections for G1](https://openjdk.org/jeps/344)
+- JEP346: [Promptly Return Unused Committed Memory from G1](https://openjdk.org/jeps/346)