JEPS are grouped according to the area and component taxonomy used in the JEP Process. On this page a JEP number links directly to the cited JEP document, while a JEP title links to the corresponding short summary below.
A summary of the changes to this list over time is available at the bottom of this page.
126Lambda Expressions & Virtual Extension Methods
Add lambda expressions (closures) and supporting features, including method references, enhanced type inference, and virtual extension methods, to the Java programming language and platform.
Owner: Brian Goetz
Author: Joseph D. Darcy
Discussion: lambda dash dev at openjdk dot java dot net
138Autoconf-Based Build System
Author: Magnus Ihse Bursie
Discussion: jdk8 dash dev at openjdk dot java dot net
160Lambda-Form Representation for Method Handles
Improve the implementation of method handles by replacing assembly language paths with an optimizable intermediate representation and then refactoring the implementation so that more work is done in portable Java code than is hardwired into the JVM.
Author: John Rose
Discussion: mlvm dash dev at openjdk dot java dot net
Define a few subset Profiles of the Java SE Platform Specification so that applications that do not require the entire Platform can be deployed and run on small devices.
Owner: Bob Vandette
Author: Bob Vandette, Mark Reinhold
Discussion: jdk8 dash dev at openjdk dot java dot net
162Prepare for Modularization
Undertake changes to smooth the eventual transition to modules in a future release, provide new tools to help developers prepare for the modular platform, and deprecate certain APIs that are a significant impediment to modularization.
Author: Alan Bateman
Discussion: jigsaw dash dev at openjdk dot java dot net
164Leverage CPU Instructions for AES Cryptography
Improve the out-of-box AES Crypto performance by using x86 AES instructions when available, and by avoiding unnecessary re-expansion of the AES key.
Author: Vladimir Kozlov
Discussion: hotspot dash compiler dash dev at openjdk dot java dot net
174Nashorn JavaScript Engine
Design and implement a new lightweight, high-performance implementation of JavaScript, and integrate it into the JDK. The new engine will be made available to Java applications via the existing javax.script API, and also more generally via a new command-line tool.
Author: Jim Laskey
Discussion: nashorn dash dev at openjdk dot java dot net
176Mechanical Checking of Caller-Sensitive Methods
Improve the security of the JDK’s method-handle implementation by replacing the existing hand-maintained list of caller-sensitive methods with a mechanism that accurately identifies such methods and allows their callers to be discovered reliably.
Owner: John Rose
Author: John Rose, Christian Thalinger, Mandy Chung
Discussion: core dash libs dash dev at openjdk dot java dot net
179Document JDK API Support and Stability
There is a long-standing shortcoming in the JDK in terms of clearly specifying the support and stability usage contract for com.sun.* types and other types shipped with the JDK that are outside of the Java SE specification. These contracts and potential evolution policies should be clearly captured both in the source code of the types and in the resulting class files. This information can be modeled with JDK-specific annotation types.
Author: Joseph D. Darcy
Discussion: core dash libs dash dev at openjdk dot java dot net
142Reduce Cache Contention on Specified Fields
Define a way to specify that one or more fields in an object are likely to be highly contended across processor cores so that the VM can arrange for them not to share cache lines with other fields, or other objects, that are likely to be independently accessed.
Owner: Tony Printezis
Author: Jesper Wilhelmsson, Tony Printezis
Discussion: hotspot dash dev at openjdk dot java dot net
122Remove the Permanent Generation
Remove the permanent generation from the Hotspot JVM and thus the need to tune the size of the permanent generation.
Author: Jon Masamitsu
Discussion: hotspot dash dev at openjdk dot java dot net
173Retire Some Rarely-Used GC Combinations
Remove three rarely-used combinations of garbage collectors in order to reduce ongoing development, maintenance, and testing costs.
Author: Bengt Rutisson
Discussion: hotspot dash gc dash dev at openjdk dot java dot net
136Enhanced Verification Errors
Provide additional contextual information about bytecode-verification errors to ease diagnosis of bytecode or stackmap deficiencies in the field.
Author: Keith McGuigan
Discussion: hotspot dash runtime dash dev at openjdk dot java dot net
147Reduce Class Metadata Footprint
Reduce HotSpot’s class metadata memory footprint in order to improve performance on small devices.
Author: Jiangli Zhou
Discussion: hotspot dash runtime dash dev at openjdk dot java dot net
Support the creation of a small VM that is no larger than 3MB.
Author: Joe Provino
Discussion: hotspot dash dev at openjdk dot java dot net
Add three memory-ordering intrinsics to the sun.misc.Unsafe class.
Author: Doug Lea
Discussion: hotspot dash dev at openjdk dot java dot net
153Launch JavaFX Applications
Enhance the java command-line launcher to launch JavaFX applications.
Author: Kumar Srinivasan
Discussion: core dash libs dash dev at openjdk dot java dot net
101Generalized Target-Type Inference
Smoothly expand the scope of method type-inference to support (i) inference in method context and (ii) inference in chained calls.
Author: Maurizio Cimadamore
Discussion: lambda dash dev at openjdk dot java dot net
104Annotations on Java Types
Extend the set of annotatable locations in the syntax of the Java programming language to include names which indicate the use of a type as well as (per Java SE 5.0) the declaration of a type.
Author: Michael Ernst, Alex Buckley
Discussion: type dash annotations dash dev at openjdk dot java dot net
Extend the Compiler Tree API to provide structured access to the content of javadoc comments.
Author: Jonathan Gibbons
Discussion: compiler dash dev at openjdk dot java dot net
106Add Javadoc to javax.tools
Extend the javax.tools API to provide access to javadoc.
Author: Jonathan Gibbons
Discussion: compiler dash dev at openjdk dot java dot net
117Remove the Annotation-Processing Tool (apt)
Remove the apt tool, associated API, and documentation from the JDK.
Author: Joseph D. Darcy
Discussion: compiler dash dev at openjdk dot java dot net
118Access to Parameter Names at Runtime
Provide a mechanism to easily and reliably retrieve the parameter names of methods and constructors at runtime via core reflection.
Owner: Alex Buckley
Author: Joseph D. Darcy
Discussion: enhanced dash metadata dash spec dash discuss at openjdk dot java dot net
120Repeating Annotations
Change the Java programming language to allow multiple application of annotations with the same type to a single program element.
Owner: Alex Buckley
Author: Joseph D. Darcy
Discussion: enhanced dash metadata dash spec dash discuss at openjdk dot java dot net
139Enhance javac to Improve Build Speed
Reduce the time required to build the JDK and enable incremental builds by modifying the Java compiler to run on all available cores in a single persistent process, track package and class dependences between builds, automatically generate header files for native methods, and clean up class and header files that are no longer needed.
Author: Magnus Ihse Bursie
Discussion: compiler dash dev at openjdk dot java dot net
Provide a means to detect errors in Javadoc comments early in the development cycle and in a way that is easily linked back to the source code.
Author: Jonathan Gibbons
Discussion: javadoc dash dev at openjdk dot java dot net
103Parallel Array Sorting
Add additional utility methods to java.util.Arrays that use the JSR 166 Fork/Join parallelism common pool to provide sorting of arrays in parallel.
Owner: Chris Hegarty
Author: David Holmes, Chris Hegarty
Discussion: core dash libs dash dev at openjdk dot java dot net
107Bulk Data Operations for Collections
Add functionality to the Java Collections Framework for bulk operations upon data. This is commonly referenced as “filter/map/reduce for Java.” The bulk data operations include both serial (on the calling thread) and parallel (using many threads) versions of the operations. Operations upon data are generally expressed as lambda functions.
Author: Mike Duigou
Discussion: lambda dash dev at openjdk dot java dot net
109Enhance Core Libraries with Lambda
Enhance the Java core library APIs using the new lambda language feature to improve the usability and convenience of the library.
Owner: Stuart W. Marks
Author: Stuart W. Marks, Mike Duigou
Discussion: core dash libs dash dev at openjdk dot java dot net
112Charset Implementation Improvements
Improve the maintainability and performance of the standard and extended charset implementations.
Author: Xueming Shen
Discussion: core dash libs dash dev at openjdk dot java dot net
119javax.lang.model Implementation Backed by Core Reflection
Provide an implementation of the javax.lang.model.* API backed by core reflection rather than by javac. In other words, provide an alternate API to access and process the reflective information about loaded classes provided by core reflection.
Author: Joseph D. Darcy
Discussion: compiler dash dev at openjdk dot java dot net
135Base64 Encoding & Decoding
Define a standard API for Base64 encoding and decoding.
Author: Alan Bateman
Discussion: core dash libs dash dev at openjdk dot java dot net
149Reduce Core-Library Memory Usage
Reduce the dynamic memory used by core-library classes without adversely impacting performance.
Owner: Roger Riggs
Author: Roger Riggs, Hinkmond Wong, David Holmes
Discussion: core dash libs dash dev at openjdk dot java dot net
Define a new date, time, and calendar API for the Java SE platform.
Owner: Xueming Shen
Author: Stephen Colebourne
Discussion: core dash libs dash dev at openjdk dot java dot net
Scalable updatable variables, cache-oriented enhancements to the ConcurrentHashMap API, ForkJoinPool improvements, and additional Lock and Future classes.
Owner: Chris Hegarty
Author: Doug Lea
Discussion: core dash libs dash dev at openjdk dot java dot net
Minor enhancements to JDBC to improve usability and portability
Author: Lance Andersen
Discussion: jdbc dash spec dash discuss at openjdk dot java dot net
177Optimize java.text.DecimalFormat.format
Optimize java.text.DecimalFormat.format by taking advantage of numerical properties of integer and floating-point arithmetic to accelerate cases with two or three digits after the decimal point.
Author: Joseph D. Darcy
Discussion: core dash libs dash dev at openjdk dot java dot net
178Statically-Linked JNI Libraries
Enhance the JNI specification to support statically linked native libraries.
Author: Bob Vandette
Discussion: jdk8 dash dev at openjdk dot java dot net
180Handle Frequent HashMap Collisions with Balanced Trees
Improve the performance of java.util.HashMap under high hash-collision conditions by using balanced trees rather than linked lists to store map entries. Implement the same improvement in the LinkedHashMap class.
Owner: Brent Christian
Author: Mike Duigou
Discussion: core dash libs dash dev at openjdk dot java dot net
127Improve Locale Data Packaging and Adopt Unicode CLDR Data
Create a tool to convert LDML (Locale Data Markup Language) files into a format usable directly by the runtime library, define a way to package the results into modules, and then use these to incorporate the de-facto standard locale data published by the Unicode Consortium’s CLDR project into the JDK.
Author: Naoto Sato
Discussion: i18n dash dev at openjdk dot java dot net
128BCP 47 Locale Matching
Define APIs so that applications that use BCP 47 language tags (see
RFC 5646) can match them to a user’s language preferences in a way that conforms to
RFC 4647.
Owner: Yuka Kamiya
Author: Naoto Sato
Discussion: i18n dash dev at openjdk dot java dot net
Author: Yuka Kamiya
Discussion: i18n dash dev at openjdk dot java dot net
Define a new type of network permission which grants access in terms of URLs rather than low-level IP addresses.
Author: Michael McMahon
Discussion: net dash dev at openjdk dot java dot net
113MS-SFU Kerberos 5 Extensions
Author: Weijun Wang
Discussion: security dash dev at openjdk dot java dot net
114TLS Server Name Indication (SNI) Extension
Add support for the TLS Server Name Indication (SNI) Extension to allow more flexible secure virtual hosting and virtual-machine infrastructure based on SSL/TLS protocols.
Author: Xuelei Fan
Discussion: security dash dev at openjdk dot java dot net
Support the AEAD/GCM cipher suites defined by SP-800-380D, RFC 5116, RFC 5246, RFC 5288, RFC 5289 and RFC 5430.
Owner: Bradford Wetmore
Author: Xuelei Fan
Discussion: security dash dev at openjdk dot java dot net
121Stronger Algorithms for Password-Based Encryption
Provide stronger Password-Based-Encryption (PBE) algorithm implementations in the SunJCE provider.
Owner: Vincent Ryan
Author: Valerie Peng
Discussion: security dash dev at openjdk dot java dot net
123Configurable Secure Random-Number Generation
Enhance the API for secure random-number generation so that it can be configured to operate within specified quality and responsiveness constraints.
Author: Bradford Wetmore
Discussion: security dash dev at openjdk dot java dot net
124Enhance the Certificate Revocation-Checking API
Improve the certificate revocation-checking API to support best-effort checking, end-entity certificate checking, and mechanism-specific options and parameters.
Author: Sean Mullan
Discussion: security dash dev at openjdk dot java dot net
129NSA Suite B Cryptographic Algorithms
Provide implementations of the cryptographic algorithms required by
NSA Suite B.
Author: Valerie Peng
Discussion: security dash dev at openjdk dot java dot net
130SHA-224 Message Digests
Implement the SHA-224 message-digest algorithm and related algorithms.
Author: Valerie Peng
Discussion: security dash dev at openjdk dot java dot net
131PKCS#11 Crypto Provider for 64-bit Windows
Include the SunPKCS11 provider in the JDK for 64-bit Windows.
Author: Valerie Peng
Discussion: security dash dev at openjdk dot java dot net
Enable code to assert a subset of its privileges without otherwise preventing the full access-control stack walk to check for other permissions.
Author: Sean Mullan
Discussion: security dash dev at openjdk dot java dot net
166Overhaul JKS-JCEKS-PKCS12 Keystores
Facilitate migrating data from JKS and JCEKS keystores by adding equivalent support to the PKCS#12 keystore. Enhance the KeyStore API to support new features such as entry metadata and logical views spanning several keystores. Enable the strong crypto algorithms introduced in JEP-121 to be used to protect keystore entries.
Author: Vincent Ryan
Discussion: security dash dev at openjdk dot java dot net
185Restrict Fetching of External XML Resources
Enhance the JAXP APIs to add the ability to restrict the set of network protocols that may be used to fetch external resources.
Author: Joe Wang
Discussion: core dash libs dash dev at openjdk dot java dot net
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