JDK 8 and JDK 8 Updates in OpenJDK

JDK 8 and JDK 8 Updates in
OpenJDK
1 Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
OpenJDK
Wolfgang Weigend
Sen. Leitender Systemberater
Java Technologie und Architektur

The following is intended to outline our general product
direction. It is intended for information purposes only, and
may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality,
and should not be relied upon in making purchasing
and should not be relied upon in making purchasing
decisions.
The development, release, and timing of any features or
functionality described for Oracle’s products remains at
the sole discretion of Oracle.

OpenJDK in a Nutshell
“The place to collaborate on an open-source
implementation of the Java Platform, Standard
Edition, and related projects.”
Edition, and related projects.”

Groups and Projects
Group
Project

Groups
OpenJDK
Governing Board Porters
PowerPC/
AIX
OpenJDK
Members
Build
JDK9
Permanent Group
JDK8u
BSD Port
Mac OSX

Roles of OpenJDK Participation
• Participant
– Making minor contributions
• Contributor
– Signed agreement, making
Participant
– Signed agreement, making
non-trivial changes
• OpenJDK Member
– Senior role, may propose
new Groups, Projects and
Members
OpenJDK
Members
Contributor

Roles of Groups
• Group Member
– An elected OpenJDK
Contributor
• Group Lead
• Group Lead
– An OpenJDK Member
appointed by the GB
– Reports on group work
– Can sponsor projects
Group
Member
Group
Lead

Roles of OpenJDK Projects
• Author
– Can create code changes
• Committer
– Can check in code changes
Reviewer
– Can check in code changes
• Reviewer
– Can approve code changes
• Project Lead
Author
Committer Project Lead

Community Engagement
Non-complex bugs, review, test portingIntermediate
Advanced Solving non-trivial bugs
Fix build warnings, trivial bugs,
test and report regressions
Starter

• Messages per Month and the mailing lists
OpenJDK 8 - MarkMail search

JDK 8 Update Informations
• All information about JDK 8 Update Releases
http://openjdk.java.net/projects/jdk8u/
• Send bug reports - Report a Bug or Request a Feature
http://bugreport.java.com/bugreport/
• Track bug reports - Tracking Your Issues In The JDK Bug System
• Track bug reports - Tracking Your Issues In The JDK Bug System
https://robilad.livejournal.com/139637.html
• How to contribute and Submit a patch
http://openjdk.java.net/contribute/
• Nominating a Contributor or Author to be a Committer
http://openjdk.java.net/projects/#project-committer

JDK Enhancement Proposal’s (JEP’s)
• Regularly updated list of proposals
– Serve as the long-term roadmap for JDK release projects
– Roadmap extends for at least three years
• Uniform format and a central archive for enhancement proposals
– Interested parties can find, read, comment, and contribute
• Process is open to every OpenJDK Committer
• Process is open to every OpenJDK Committer
• Enhancement is a non-trivial change to the JDK code base
– Two or more weeks of engineering effort
– significant change to JDK or development processes and infrastructure
– High demand from developers or customers
• JDK Enhancement-Proposal & Roadmap Process
http://openjdk.java.net/jeps/1

Java SE 8 Reference Implementations
• Available at https://jdk8.java.net/java-se-8-ri/
• Based solely upon open source code from JDK 8 Project in OpenJDK
– RI binaries source code available under the GPLv2 in a single zip file (118 MB)
• Binaries provided
– Oracle Linux 6.1 x64 Java Development Kit (154 MB)
– Windows 7 i586 Java Development Kit (90.1 MB)
– Windows 7 i586 Java Development Kit (90.1 MB)
– Oracle Linux 6.1 i586 (for Compact Profiles) JRE, see JEP 161 Compact Profiles
• Binaries provided primarily for use by implementor’s of the Java SE 8 Platform Specification
• Recommended for reference purposes only
• Reference Implementations have been approved by the JCP
• They will receive no updates, not even for security issues
• RI Binaries under the GNU General Public License version 2
– and under the Oracle Binary Code License

JDK 8 Updates Project in OpenJDK
• Oracle JDK 8 Updates based on an OpenJDK Project
• Web Site: http://openjdk.java.net/projects/jdk8u
• Information on developers and development processes
• Q & A and status updates
• Q & A and status updates
• Sources: http://hg.openjdk.java.net/jdk8u/jdk8u
• Master forest: jdk8u/jdk8u
• Development forest: http://hg.openjdk.java.net/jdk8u/jdk8u-dev
• Mailing list: jdk8u-dev@openjdk.java.net
14

OpenJDK - 11105 Commits in 12 Months
Source: http://www.ohloh.net/p/openjdk/commits/summary

JDK 8
Innovation
• Lambda JSR 335
• Language Interoperability
• Nashorn
Core Libraries
• Parallel operations for core collections API‘s
Java for Everyone
• Profiles for constrained devices
• JSR 310 – Date & Time API‘s
• Non-Gregorian calendars
• Unicode 6.1
• ResourceBundle
• BCP47 locale matching
Client
• Deployment enhancements
• JavaFX 8
• Public UI Control API
• Java SE Embedded support
• Enhanced HTML5 support
• 3D shapes and attributes
• Parallel operations for core collections API‘s
• Improvements in functionality
• Improved type inference
General Goodness
• JVM enhancements
• No PermGen limitations
• Performance Improvements
• BCP47 locale matching
• Globalization & Accessibility
Tools
• Compiler control & logging
• JSR 308 – Annotations on Java Type
• Native app bundling
• App Store Bundling tools
• 3D shapes and attributes
• Printing
Security
• Limited doPriviledge
• NSA Suite B algorithm support
• SNI Server Side support
• DSA update to FIPS186-3
• AEAD JSSE CipherSuites

Lambda Expression JSR-335
• Functional Interfaces: “An interface with one method”
• Gehört zum Sprachumfang von Java SE 8
− Final Release Specification
file:///C:/Java/jsr335-final/index.html
− http://www.oracle.com/technetwork/java/javase/downloads/index.html
− http://www.oracle.com/technetwork/java/javase/downloads/index.html
• Lambda Expressions (closures)
/* (int x, int y) {return x+y; } */
• Parameter Liste → -> Operator → Expression od. Statements
(String x) -> {return !x.isEmpty();}
• Was hergeleitet werden kann, kann auch weggelassen werden
x -> !x.isEmpty()

Extension Methods
• Provide a mechanism to add new methods to existing interfaces
– Without breaking backwards compatibility
– Gives Java multiple inheritance of behaviour, as well as types
• but not state!
public interface Set<T> extends Collection<T> {
public int size();
... // The rest of the existing Set methods
public T reduce(Reducer<T> r)
default Collections.<T>setReducer;
}

List<Student> students = new ArrayList<>(...);
...
double highestScore =
students.parallelStream()
.filter(s -> s.getGradYear() == 2013)
.map(s -> s.getScore())
.reduce(0.0, Integer::max);
Lambda Expressions – Parallel
State of the Lambda Libraries Edition
.reduce(0.0, Integer::max);
− More readable
− Better abstraction
− No reliance on mutable state
− Runs in parallel
− Works on any data structure that knows how to subdivide itself
Concurrent Bulk Data Operations in Java collections API’s (JEP 107)
− filter/map/reduce

Java Mission Control 5.3

• Information gathering
− Instrumentation calls all over the JVM
− Application information via Java API
• Collected in Thread Local buffers
⇢ Global Buffers ⇢Disk
Java Flight Recorder – How is it built?
⇢ Global Buffers ⇢Disk
• Binary, proprietary file format
• Managed via JMX
• Java Flight Recorder
− Start from JMC 5.3 or CLI
• Activate Flight Recorder
− -XX: +UnlockCommercialFeatures
− -XX: +FlightRecorder

JavaFX via Open Source in JDK 8
Open Source
OpenJFX Project under
OpenJDK
Converged
Common license with
Java SE
Standardization
Oracle committed to
JavaFX standardization
OpenJDK
First phase to focus on
UI Controls
Java SE
JavaFX included in
Java SE with JDK 8
JavaFX for Java SE
Embedded (ARM)
JavaFX standardization
JSR to be submitted
through JCP

JavaFX goes Open Source
iOS- and Android-Implementations
• iOS- and Android-Implementions are Open Source
• Licensing with an own Application-Co-Bundle

Compact-Profiles
RI Binaries under the GNU General
Public License version 2 and
under the Oracle Binary Code License
• Compact Profile 1 (13.8 MB)

Compact-Profiles and Packages
Compact1 Profil Compact2 Profil Compact3 Profil Vollständige JRE
java.lang java.sql java.lang.management java.applet
java.io jvax.sql javax.management java.awt
java.nio javax.xml javax.naming java.beans
java.text org.w3c.dom java.sql.rowset javax.activity
java.math org.xml.sax javax.security.auth.kerberos javax.rmi
java.net java.rmi org.ietf.jgss javax.rmi.CORBA
javax.net javax.rmi javax.script org.omg
javax.net javax.rmi javax.script org.omg
java.util javax.transaction javax.xml.crypto javax.accessibility
java.util.logging java.util.prefs javax.imagio
java.security javax.security.sasl javax.print
javax.crypto javax.security.acl javax.sound
javax.security javax.lang.instrument javax.swing
javax.annotation.processing javax.activation
javax.lang.model javax.jws
javax.lang.model.element
javax.lang.model.type
javax.lang.model.util
javax.tools
javax.xml.bind
javax.xml.soap
javax.xml.ws
javax.annotation

Compact-Profile – New Option for „javac“
• New “javac” option
‒ javac -target 8 -profile Profile
‒ The javac compiler will verify java code against APIs available in profile
‒ $ javac -profile compact1 Hello.java
• New “jar” option
• New “jar” option
‒ jar -profile Profile
‒ Marks jar file with minimum required profile
‒ Main application jar file defines default minimum profile
• Runtime verification of profile
‒ jar files will be validated at startup to ensure minimum profile is running
• “java -version” will report active profile

Project Nashorn
• Lightweight, high-performance JavaScript engine
− Integrated into JRE
• ECMAScript 5.1 compliant JavaScript that runs on the JVM
− Accessible via javax.script API or jjs command line
• Replacement for Rhino
• Exploits JSR-292 via Dynalink
• Fully part of the OpenJDK
• Available on Java SE and Java ME
• Nashorn - Der Weg zur polyglotten VM

Project Nashorn Performance
‒Test app executes Esprima parser and tokenizer
bitbucket.org/ariya/nashorn-speedtest
‒Rhino gets the first chance, Nashorn follows right after, each engine gets 30 runs
In the beginning, Rhino’s first run is 2607 ms and slowly it speeds up and finally this parsing is completed in just 824 ms
‒Nashorn timings have a different characteristic
When it is cold, Nashorn initially takes 5328 ms to carry out the operation but it quickly picks up the pace and imediate,
it starts moving full steam ahead, reaching 208 ms per run
‒Nashorn compiles JavaScript code into Java bytecodes and run them on the JVM itself
‒Nashorn compiles JavaScript code into Java bytecodes and run them on the JVM itself
Nashorn is taking advantage of invokedynamic instruction to permit "efficient and flexible execution" in a dynamic
environment such as JavaScript
mytext

Java SE Roadmap
JDK 9
• Jigsaw
• Interoperability
• Optimizations
• Cloud
• Ease of Use
• JavaFX JSR
JDK 7u40/45/51/55
• Java Flight Recorder
in JDK
• Native Memory
Tracking
• Java Discovery
Protocol
• App Store Packaging
Tools
JDK 8 GA18th of March 2014
• Lambda
• Complete JVM Convergence
• JavaScript Interoperability
• JavaFX 8
− Public UI Control API
− Java SE Embedded support
− Enhanced HTML5 support
JDK 8.1 Q3 2014
• Deterministic G1
• JMC 6
• Improved JRE
installer
• Japp bundling
enhancements
JDK 7u21
• Java Client
Security
Enhancements
JDK
8.2
2013 2014
NetBeans IDE 9
• JDK 9 support
• Scene Builder 3.0 support
Scene Builder 3.0
• JavaFX 9 support
2016
• Scene Builder support
NetBeans IDE 7.3
• New hints and refactoring
• Scene Builder support
Tools
NetBeans IDE 8
• JDK 8 support
• Scene Builder 2.0 support
Scene Builder 2.0
• JavaFX 8 support
• Enhanced Java IDE support
Scene Builder 1.1
• Linux support
2015

JDK 8u20 - OpenJDK 8u20 Release
• General bug fixes to improve and enhance the OpenJDK 8u releases
• Schedules are subject to change
• Best efforts are made to keep this page updated with most recent information. Only
critical fixes will be considered for integration in the weeks leading up to the GA milestone
• The code freeze dates are usually one week before the milestone. Exact dates and a
8u-dev forests are opened January 2014
Feature Complete March 2014
Rampdown 1 April 2014
RampDown 2 June 2014
GA, Fork for the stabilization forests August 2014
• The code freeze dates are usually one week before the milestone. Exact dates and a
heads up will be sent to the mailing list when a milestone is approaching

Summary
• Java SE 8 with lots of new functionality
– Language
– Libraries
– JVM
– JVM
• Java evolves continuously
– jdk8.java.net
– www.jcp.org
– openjdk.java.net/jeps

Thanks!
Wolfgang.Weigend@oracle.com
Twitter: @wolflook

JDK 8 and JDK 8 Updates in OpenJDK

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