经过4次跳票,历经曲折的 Java 9 正式版终于发布了! 你可以通过这里下载 Java 9 正式版。JDK9 提供超过 150 项新功能特性,包括备受期待的模块化系统、可交互的 REPL 工具 jshell,以及安全增强、扩展提升、性能管理改善等。
同时发布的还有 Java EE 8 。
相关链接:
- Installation Instructions
 - Release Notes
 - What’s New in Oracle JDK 9
 - Release Notes for JDK 9 and JDK 9 Update Releases
 - Readme
 
其他链接:
附上 JDK 9 特性一览:
102: Process API 更新
 110: HTTP 2 Client
 143: 提升访问对象时的线程竞争处理
 158: 统一 JVM 日志
 165: Compiler Control
 193: Variable Handles
 197: 分割代码缓存区
 199: Smart Java Compilation, 第二阶段
 200: 模块化JDK
 201: 模块化源码
 211: Elide Deprecation Warnings on Import Statements
 212: Resolve Lint and Doclint Warnings
 213: Milling Project Coin
 214: Remove GC Combinations Deprecated in JDK 8
 215: Tiered Attribution for javac
 216: Process Import Statements Correctly
 217: Annotations Pipeline 2.0
 219: Datagram Transport Layer Security (DTLS)
 220: 模块化运行时镜像
 221: Simplified Doclet API
 222: jshell: The Java Shell (Read-Eval-Print Loop)
 223: New Version-String Scheme
 224: HTML5 Javadoc
 225: Javadoc Search
 226: UTF-8 Property Files
 227: Unicode 7.0
 228: Add More Diagnostic Commands
 229: Create PKCS12 Keystores by Default
 231: Remove Launch-Time JRE Version Selection
 232: Improve Secure Application Performance
 233: Generate Run-Time Compiler Tests Automatically
 235: Test Class-File Attributes Generated by javac
 236: Parser API for Nashorn
 237: Linux/AArch64 Port
 238: Multi-Release JAR Files
 240: Remove the JVM TI hprof Agent
 241: Remove the jhat Tool
 243: Java-Level JVM Compiler Interface
 244: TLS Application-Layer Protocol Negotiation Extension
 245: Validate JVM Command-Line Flag Arguments
 246: Leverage CPU Instructions for GHASH and RSA
 247: Compile for Older Platform Versions
 248: Make G1 the Default Garbage Collector
 249: OCSP Stapling for TLS
 250: Store Interned Strings in CDS Archives
 251: Multi-Resolution Images
 252: Use CLDR Locale Data by Default
 253: Prepare JavaFX UI Controls & CSS APIs for Modularization
 254: Compact Strings
 255: Merge Selected Xerces 2.11.0 Updates into JAXP
 256: BeanInfo Annotations
 257: Update JavaFX/Media to Newer Version of GStreamer
 258: HarfBuzz Font-Layout Engine
 259: Stack-Walking API
 260: Encapsulate Most Internal APIs
 261: 模块化系统
 262: TIFF Image I/O
 263: HiDPI Graphics on Windows and Linux
 264: Platform Logging API and Service
 265: Marlin Graphics Renderer
 266: More Concurrency Updates
 267: Unicode 8.0
 268: XML Catalogs
 269: Convenience Factory Methods for Collections
 270: Reserved Stack Areas for Critical Sections
 271: Unified GC Logging
 272: Platform-Specific Desktop Features
 273: DRBG-Based SecureRandom Implementations
 274: Enhanced Method Handles
 275: Modular Java Application Packaging
 276: Dynamic Linking of Language-Defined Object Models
 277: Enhanced Deprecation
 278: Additional Tests for Humongous Objects in G1
 279: Improve Test-Failure Troubleshooting
 280: Indify String Concatenation
 281: HotSpot C++ Unit-Test Framework
 282: jlink: The Java Linker
 283: Enable GTK 3 on Linux
 284: New HotSpot Build System
 285: Spin-Wait Hints
 287: SHA-3 Hash Algorithms
 288: Disable SHA-1 Certificates
 289: Deprecate the Applet API
 290: Filter Incoming Serialization Data
 291: Deprecate the Concurrent Mark Sweep (CMS) Garbage Collector
 292: Implement Selected ECMAScript 6 Features in Nashorn
 294: Linux/s390x Port
 295: Ahead-of-Time Compilation
 297: Unified arm32/arm64 Port
 298: Remove Demos and Samples
 299: Reorganize Documentation










