JEP 425: Virtual Threads (Preview)
Summary Introduce virtual threads to the Java Platform. Virtual threads are lightweight threads that dramatically reduce the effort of writing, maintaining, and observing high-throughput concurrent applications. This is a preview API. Goals Enable server applications written in the simple thread-per-request style to scale with near-optimal hardware utilization. Enable existing code that uses the j
JEP 363: Remove the Concurrent Mark Sweep (CMS) Garbage Collector
Summary Remove the Concurrent Mark Sweep (CMS) garbage collector. Non-Goals It is not a goal to remove any other garbage collector. It is not a goal to remove the CMS garbage collector from releases prior to the release to which this JEP is targeted. Motivation More than two years ago in, JEP 291, we deprecated the CMS collector for removal in a future release, in order to accelerate the developme
Local Variable Type Inference: Style Guidelines
Introduction Java SE 10 introduced type inference for local variables. Previously, all local variable declarations required an explicit (manifest) type on the left-hand side. With type inference, the explicit type can be replaced by the reserved type name var for local variable declarations that have initializers. The type of the variable is inferred from the type of the initializer. There is a ce
JEP 259: Stack-Walking API
Summary Define an efficient standard API for stack walking that allows easy filtering of, and lazy access to, the information in stack traces. Non-Goal It is not a goal to convert all existing stack walking code in the JDK to use this new API. Motivation There is no standard API to traverse selected frames on the execution stack efficiently and access the Class instance of each frame. There are ex
JEP 193: Variable Handles
Summary Define a standard means to invoke the equivalents of various java.util.concurrent.atomic and sun.misc.Unsafe operations upon object fields and array elements, a standard set of fence operations for fine-grained control of memory ordering, and a standard reachability-fence operation to ensure that a referenced object remains strongly reachable. Goals The following are required goals: Safety
JEP 322: Time-Based Release Versioning
Alan Bateman, Alex Buckley, Dalibor Topic, Iris Clark, John Rose Summary Revise the version-string scheme of the Java SE Platform and the JDK, and related versioning information, for present and future time-based release models. Goals Recast the version-number scheme introduced by JEP 223 so that it better fits time-based release models that define feature releases, which can contain new features,
Project Jigsaw: Quick Start Guide
Project Jigsaw: Module System Quick-Start Guide This document provides a few simple examples to get developers started with modules. The file paths in the examples use forward slashes, and the path separators are colons. Developers on Microsoft Windows should use file paths with back slashes and a semi-colon as the path separator. Greetings Greetings world Multi-module compilation Packaging Missin
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JEP 321: HTTP Client API
JEP 391: macOS/AArch64 Port
JEP 388: Windows/AArch64 Port
JEP 386: Alpine Linux Port
JEP draft: Throughput post-write barrier for G1
OpenJDK: Portola Project
JDK 8 Features