| Version | Change log |
| Java SE Development Kit (JDK) 23.0.2 Feb 4, 2025 |
JDK 23.0.2 contains IANA time zone data 2024b which contains the following changes: Improve historical data for Mexico, Mongolia, and Portugal. System V names are now obsolescent. The main data form now uses %z. The code now conforms to RFC 8536 for early timestamps. Support POSIX.1-2024, which removes asctime_r and ctime_r. Other Notes: core-libs/java.lang ➜ ProcessBuilder on Windows Quotes Argument Strings Containing Any Space Character (JDK-8335428 (not public)): On Windows, the ProcessBuilder has expanded the quoting of argument strings when starting a process to ensure they are recognized by the application as a single command argument. The set of space characters has been expanded from space (0x20) to include all space characters as defined by java.lang.Character.isSpaceChar, which includes all Unicode space separator characters, such as EN-SPACE (0x2002), and line separator and paragraph separator characters. core-libs/java.time ➜ Support for Time Zone Database 2024b (JDK-8339637): IANA Time Zone Database has been upgraded to 2024b. This version mainly includes changes to improve historical data for Mexico, Mongolia, and Portugal. It also changes one timestamp abbreviation, for the time zone 'MET'. Also Asia/Choibalsan is now an alias for Asia/Ulaanbaatar. The new tzdata changes also impact some legacy time zone IDs. As per 2024b changes "EST" links to "America/Panama", "HST" links to "Pacific/Honolulu" and "MST" links to "America/Phoenix". To maintain compatibility with the Java SE specification, the java.time.ZoneId.SHORT_IDS Map has not changed. Further details are available at JDK-8342331 Bug Fixes: Target class of upcall stub may be unloaded Extra call to MethodHandle::asType from memory segment var handles fails to inline LambdaForm customization via MethodHandle::updateForm is not thread safe File libCreationTimeHelper.c compile fails on Alpine [REDO] java/nio/file/attribute/BasicFileAttri |
| Java SE Development Kit (JDK) 23.0.1 Oct 16, 2024 |
Notable Issues Resolved: install/install: ➜ JDK RPM Upgrade Leaves Orphan Alternatives Entry (JDK-8336107 (not public)) Fixed the issue with entries in the "java" and "javac" groups not being properly managed during an RPM upgrade. Upgrading from an older Java RPM installed into a shared directory (/usr/lib/jvm/jdk-${FEATURE}-oracle-${ARCH}) to a Java RPM installing into a version-specific directory (/usr/lib/jvm/jdk-${VERSION}-oracle-${ARCH}), results in the older Java entries in the "java" and "javac" groups not being deleted. The issue does not manifest until the new Java is uninstalled. When it is uninstalled and Java from the lower release is installed, running Java commands like java or keytool without the full path specified will result in the "command not found" error. For example, install 21.0.3; upgrade it to 21.0.4; uninstall 21.0.4; install any Java update of 17 or 11 or 8 release; run "java" from the command line. The command will fail with the "command not found" error. Manually delete orphan Java entries in the "java" and "javac" groups to workaround the issue. Other Notes: core-libs/java.net: ➜ New Default Limits in the JDK HTTP Implementations (JDK-8328286 (not public)) New Default limits have been added to HTTP in the JDK. The JDK built-in implementation of the legacy URL protocol handler for HTTP, HttpURLConnection, and the new HttpClient, in the module java.net.http, now have a default limit on the maximum response headers size they will accept from a remote party. The limit is set by default at 384kB (393216 bytes) and is computed as the cumulative size of all header names and header values plus an overhead of 32 bytes per header name value pair. The default value of the limit can be changed by specifying a positive value with the jdk.http.maxHeaderSize system property on the command line, or in the appropriate conf.properties or net.properties file. A |
| Java SE Development Kit (JDK) 23 Sep 18, 2024 |
Major New Functionality: Primitive Types in Patterns, instanceof, and switch (Preview): Enhance pattern matching by allowing primitive type patterns in all pattern contexts, and extend instanceof and switch to work with all primitive types. This is a preview language feature. Module Import Declarations (Preview): Enhance the Java programming language with the ability to succinctly import all of the packages exported by a module. This simplifies the reuse of modular libraries, but does not require the importing code to be in a module itself. This is a preview language feature. Flexible Constructor Bodies (Second Preview): In constructors in the Java programming language, allow statements to appear before an explicit constructor invocation, i.e., super(..) or this(..). The statements cannot reference the instance under construction, but they can initialize its fields. Initializing fields before invoking another constructor makes a class more reliable when methods are overridden. This is a preview language feature. Implicitly Declared Classes and Instance Main Methods (Third Preview): Evolve the Java programming language so that beginners can write their first programs without needing to understand language features designed for large programs. Far from using a separate dialect of the language, beginners can write streamlined declarations for single-class programs and then seamlessly expand their programs to use more advanced features as their skills grow. Experienced developers can likewise enjoy writing small programs succinctly, without the need for constructs intended for programming in the large. This is a preview language feature. Libraries Previews and Incubator: Class-File API (Second Preview): Provide a standard API for parsing, generating, and transforming Java class files. This is a preview API. Stream Gatherers (Second Preview): Enhance the Stream API to support custom intermediate operations. This will allow stream pipelines to transform data in ways that |
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