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 PortMac 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 LeadAuthor

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 Releaseshttp://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 Systemhttps://robilad.livejournal.com/139637.html

• How to contribute and Submit a patchhttp://openjdk.java.net/contribute/

• Nominating a Contributor or Author to be a Committerhttp://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 Processhttp://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: [email protected]

14

OpenJDK - 11105 Commits in 12 Months


Source: http://www.ohloh.net/p/openjdk/commits/summary

JDK 8Innovation• 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 – ParallelState 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 SourceiOS- 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 andunder 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 RoadmapJDK 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!

[email protected]

Twitter: @wolflook


JDK 8 and JDK 8 Updates in OpenJDK

Software

Transcript of JDK 8 and JDK 8 Updates in OpenJDK