17

Java 17 Release Notes Documentation

Release Notes

New Features and Enhancements

specification

JEP 409: Sealed Classes

JEP 406: Pattern Matching for switch (Preview)

client-libs/2d

JEP 382: New macOS Rendering Pipeline

client-libs/javax.swing

New API for Accessing Large Icons

core-libs/java.net

DatagramSocket Can Be Used Directly to Join Multicast Groups

core-libs/java.nio

Add support for UserDefinedFileAttributeView on macOS

core-libs/java.util

JEP 356: Enhanced Pseudo-Random Number Generators

hotspot/compiler

Modernization of Ideal Graph Visualizer

tools/javadoc(tool)

Source Details in Error Messages

New Page for "New API" and Improved "Deprecated" Page

core-libs

JEP 412: Foreign Function & Memory API (Incubator)

Console Charset API

core-libs/java.io:serialization

JDK Flight Recorder Event for Deserialization

JEP 415: Implement Context-Specific Deserialization Filters

The Java Core Libraries Developers Guide for Serialization Filtering describes use cases and provides examples.

core-libs/java.lang

System Property for Native Character Encoding Name

core-libs/java.time

Add java.time.InstantSource

core-libs/java.util

Hex Formatting and Parsing Utility

hotspot/compiler

Experimental Compiler Blackholes Support

New Class Hierarchy Analysis Implementation in the HotSpot JVM

JEP 391: macOS/AArch64 Port

hotspot/runtime

Unified Logging Supports Asynchronous Log Flushing

infrastructure/build

macOS on ARM Early Access Available

security-libs/java.security

Provide Support for Specifying a Signer in Keytool -genkeypair Command

security-libs/javax.crypto

SunJCE Provider Supports KW and KWP Modes With AES Cipher

security-libs/javax.crypto:pkcs11

New SunPKCS11 configuration properties

SunPKCS11 Provider Supports ChaCha20-Poly1305 Cipher and ChaCha20 KeyGenerator if Supported by PKCS11 Library

security-libs/javax.net.ssl

Configurable Extensions With System Properties

security-libs/org.ietf.jgss:krb5

Use permitted_enctypes if default_tkt_enctypes or default_tgs_enctypes is not present

tools/javadoc(tool)

"Related Packages" on a Package Summary Page

Removed Features and Options

core-libs

JEP 403: Strongly Encapsulate JDK Internals

security-libs/java.security

Removed Telia Company's Sonera Class2 CA Certificate

core-libs

Removal of sun.misc.Unsafe::defineAnonymousClass

core-libs/java.rmi

JEP 407: Remove RMI Activation

hotspot/compiler

JEP 410: Remove the Experimental AOT and JIT Compiler

Deprecated Features and Options

client-libs/java.awt

JEP 398: Deprecate the Applet API for Removal

security-libs/java.security

JEP 411: Deprecate the Security Manager for Removal

security-libs/org.ietf.jgss:krb5

Deprecate 3DES and RC4 in Kerberos

core-libs/java.net

Deprecate the Socket Implementation Factory Mechanism

hotspot/jvmti

Deprecate JVM TI Heap functions 1.0

Other notes

core-libs/javax.naming

New System and Security Properties to Control Reconstruction of Remote Objects by JDK's Built-in JNDI RMI and LDAP Implementations

core-libs/java.util:collections

TreeMap.computeIfAbsent Mishandles Existing Entries Whose Values Are null

install

Change to Package Names in Linux RPM/DEB Installers

install/install

Updated List of Capabilities Provided by JDK RPMs

ADDLOCAL=ToolsFeature,SourceFeature Argument No Longer Needed For Windows JDK Installer

security-libs/java.security

Added 2 HARICA Root CA Certificates

Disable SHA-1 JARs

security-libs/javax.xml.crypto

Enable XML Signature Secure Validation Mode by Default

Disable SHA-1 XML Signatures

core-libs

RegEx Pattern Matching Loses Character Class After Intersection (&&) Operator

core-libs/java.lang:reflect

Remove Vestiges of Intermediate JSR 175 Annotation Format

core-libs/java.net

URL FTP Protocol Handler: IPv4 Address Validation in Passive Mode

core-libs/java.nio

New Implementation of java.nio.channels.Selector on Microsoft Windows

core-libs/java.util

Extra '0' in java.util.Formatter for '%012a' Conversion With a Sign Character

core-libs/java.util:collections

Collections.unmodifiable* Methods Are Idempotent for Their Corresponding Collection

core-libs/java.util:i18n

Support for CLDR Version 39

ISO 639 Language Codes for Hebrew/Indonesian/Yiddish

core-svc/java.lang.instrument

Requirements of an Agent's premain Method Changed to Conform to the Specification

docs/release_notes

XML Implementation Specific Features and Properties

hotspot/gc

Segmentation Fault Error on 9th and 10th Generation Intel® Core™ Processors

Parallel GC Enables Adaptive Parallel Reference Processing by Default

security-libs/java.security

New System Property Added to Enable the OCSP Nonce Extension

Updated keytool to Create AKID From SKID of Issuing Certificate as Specified by RFC 5280

Updated Specifications of KeyStoreSpi.engineStore(KeyStore.LoadStoreParameter) and KeyStore.store(KeyStore.LoadStoreParameter) Methods

jarsigner Tool Warns if Weak Algorithms Are Used in Signer’s Certificate Chain

security-libs/javax.net.ssl

SocketExceptions Are Not Wrapped Into SSLExceptions in SSLSocketImpl

specification/language

JEP 306: Restore Always-Strict Floating-Point Semantics

tools/javadoc(tool)

Improved Nested Class Summary

Improved Package Summary Pages

Improved Output for @see Tags

Ids Used by the Standard Doclet

Improved "Help" Page

Legal Headers for Generated Files

Check for Empty Paragraphs

DocLint Reports Missing "descriptions"

core-libs/java.lang:class_loading

URLClassLoader No Longer Throws Undocumented IllegalArgumentException From getResources and findResources

core-libs/java.lang

Less Ambiguous Processing of ProcessBuilder Quotes on Windows