JDK 11 发布说明

• 前言
• 介绍
• 重要改变及信息
• JDK 11 新的特性及增强
• JEP 327 Unicode 10
• JEP 321 HTTP 客户端（标准）
• 新的 Collection.toArray(IntFunction) 默认方法
• 使用 Unicode CLDR v33 更新了本地化数据
• 延迟分配编译器线程
• JEP 333 ZGC 一个可伸缩的低延迟垃圾回收器（试验）
• JEP 318 Epsilon，无操作垃圾收集器
• JEP 331 Low-Overhead Heap Profiling
• JEP 181 Nest-Based Access Control
• JEP 324 Key Agreement with Curve25519 and Curve448
• Added Brainpool EC Support (RFC 5639)
• JEP 329 ChaCha20 and Poly1305 Cryptographic Algorithms
• Enhanced KeyStore Mechanisms
• RSASSA-PSS Signature Support Added to SunMSCAPI
• JEP 332 Transport Layer Security (TLS) 1.3
• Support for AES Encryption with HMAC-SHA2 for Kerberos 5 Defined in RFC 8009
• JEP 323：Lambda参数的 var 语法
• JEP 330 运行单文件源代码程序
• 删除的特性和选项
• Removal of com.sun.awt.A
• Removal of Lucida Fonts from Oracle JDK
• Removal of appletviewer Launcher
• Oracle JDK's javax.imageio JPEG Plugin No Longer Supports Images with alpha
• Removal of sun.misc.Unsafe.defineClass
• Removal of Thread.destroy() and Thread.stop(Throwable) Methods
• Removal of sun.nio.ch.disableSystemWideOverlappingFileLockCheck Property
• Removal of sun.locale.formatasdefault Property
• Removal of JVM-MANAGEMENT-MIB.mib
• Removal of SNMP Agent
• Removal of Java Deployment Technologies
• Removal of JMC from the Oracle JDK
• Removal of JavaFX from the Oracle JDK
• JEP 320 Remove the Java EE and CORBA Modules
• 废弃的特性和选项
• ThreadPoolExecutor Should Not Specify a Dependency on Finalization
• JEP 335 Deprecate the Nashorn JavaScript Engine
• Deprecate -XX+AggressiveOpts
• Obsolete Support for Commercial Features
• Deprecate Stream-Based GSSContext Methods
• JEP 336 Deprecate the Pack200 Tools and API
• 其它备注
• GTK3 Is Now the Default on Linux/Unix
• Better Stack Walking
• Method ClassgetAnnotation Throws a TypeNotPresentException When the Annotation Class Is Not Present
• Make Some System Properties Effectively readonly
• java.lang.ref.Reference Does Not Support Cloning
• filterArguments Runs Multiple Filters in the Wrong Order
• Change to Policy for the Default Set of Modules Resolved When Compiling or Running Code on the Class Path
• URLClassLoader Does Not Specify Behavior When URL Array Contains null
• Readiness Information Previously Recorded in SelectionKey Ready Set Not Preserved
• SelectableChannel.register Can Be Invoked While a Selection Operation Is in Progress
• DatagramChannel.send Throws AlreadyConnectedException Instead of IllegalArgumentException
• Separate Blocking and Non-blocking Code Paths
• Japanese New Era Implementation
• Enable Java Access Bridge Check Box Option in Control Panel Is Not Available with JDK 11 Installer
• New PerfCounters for STW Phases on Concurrent GC Are Available
• G1 Enables Adaptive Parallel Reference Processing by Default
• Fail Immediately If a GC That Is Unavailable Is Selected
• Garbage Collectors Adaptively Scale the Number of Threads by Default
• Better Stability with Older NUMA Libraries (-XX+UseNuma)
• NotifyFramePop Request Is Not Cleared if JVMTI_EVENT_FRAME_POP Is Disabled
• Extend Class Data Sharing (CDS) to Support the Module Path
• JFR Start Failure After AppCDS Archive Created with JFR StartFlightRecording
• javax.transaction.xa Package Moved to the java.transaction.xa Module
• Added Google Trust Services GlobalSign Root Certificates
• Added GoDaddy Root Certificates
• Removal of Baltimore Cybertrust Code Signing CA
• Removal of SECOM Root Certificate
• Added T-Systems, GlobalSign and Starfield Services Root Certificates
• Removal of AOL and Swisscom Root Certificates
• Removal of Several Symantec Root CAs
• Added Entrust Root Certificates
• jarsigner Prints When a timestamp Will Expire
• TLS 1.3 Half-Close Policy
• 3DES Cipher Suites Disabled
• supported_groups Extension Should Not be Present in ServerHello Handshake Message
• Updated xmldsig Implementation to Apache Santuario 2.1.1
• XML Signatures Signed with EC Keys Less Than 224 Bits Disabled
• Kerberos Sequence Number Issues
• KerberosString Uses UTF-8 Encoding by Default
• --add-exports No Longer Implies Readability in javac
• Packages Not Visible in Imports Are Rejected
• Missing Types Are Consistently Modeled as ERROR Types
• Oracle JDK 与 OpenJDK 的差异