Java SE 8 - Java Technologie Update

Transcription

2 Disclaimer 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 decisions. The development, release, and timing of any features or functionality described for Oracle s products remains at the sole discretion of Oracle. 2 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

3 JDK 8 Innovation Java for Everyone Client Lambda JSR 335 Profiles for constrained devices Deployment enhancements Language Interoperability JSR 310 Date & Time API s JavaFX 8 Nashorn Non-Gregorian calendars Public UI Control API Unicode 6.1 Java SE Embedded support ResourceBundle Enhanced HTML5 support BCP47 locale matching 3D shapes and attributes Globalization & Accessibility Printing Tools Security Compiler control & logging Limited dopriviledge Core Libraries Parallel operations for core collections API s Improvements in functionality Improved type inference General Goodness JVM enhancements No PermGen limitations Performance Improvements 3 Copyright 2014, Oracle and/or its affiliates. All rights reserved. JSR 308 Annotations on Java Type NSA Suite B algorithm support Native app bundling SNI Server Side support App Store Bundling tools DSA update to FIPS186-3 AEAD JSSE CipherSuites

4 Lambda Ausdrücke 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 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 4 Copyright 2014, Oracle and/or its affiliates. All rights reserved. x ->!x.isempty()

5 Extension Methods Bringt Mehrfachvererbung und Funktionalität für Java 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; 5 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

6 Erweiterung der Core Libraries mit Lambdas Modernize general library API s Improve performance Gains from use of invokedynamic to implement Lambdas Demonstrate best practices for extension methods 6 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

7 Concurrency Updates Scalable update variables DoubleAccumulator, DoubleAdder, etc Multiple variables avoid update contention Good for frequent updates, infrequent reads ConcurrentHashMap updates Improved scanning support, key computation ForkJoinPool improvements Completion based design for IO bound applications 7 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

8 Bulk Data Operations für Collections Filter, Map, Reduce for Java 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 Serial and parallel implementations Operations upon data are generally expressed as lambda functions Parallel implementation builds on Fork-Join framework 8 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

9 Parallel Array Sorting Additional utility methods in java.util.arrays parallelsort (multiple signatures for different primitives) Anticipated minimum improvement of 30% over sequential sort For dual core system with appropriate sized data set Built on top of the fork-join framework Uses Doug Lea s ParallelArray implementation Requires working space the same size as the array being sorted 9 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

10 Lambda Ausdrücke Parallelisiert State of the Lambda Libraries Edition List<Student> students = new ArrayList<>(...);... double highestscore = students.parallelstream().filter(s -> s.getgradyear() == 2013).map(s -> s.getscore()).reduce(0.0, Integer::max); 10 Copyright 2014, Oracle and/or its affiliates. All rights reserved. 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

11 Date and Time API JSR 310 JEP 150 by Stephen Colebourne A new date, time, and calendar API for the Java SE platform Supports standard time concepts Partial, duration, period, intervals date, time, instant, and time-zone Provides a limited set of calendar systems and be extensible to others Uses relevant standards, including ISO-8601, CLDR, and BCP47 Based on an explicit time-scale with a connection to UTC 11 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

12 Date and Time API JSR 310 New Classes The main difference you will notice is that there are several different classes to represent time, date, time period, and timezone specific data. Also there are transformers for dates and times For dates and times without a timezone, use the following: LocalDate Day, month, year LocalTime Time of day only LocalDateTime Both date and time For timezone specific times you use ZonedDateTime Previous to Java 8, to calculate the time eight hours in the future you would need to write something like the following: 1 Calendar cal = Calendar.getInstance(); 2 cal.add(calendar.hour, 8); 3 cal.gettime(); // actually returns a Date With Java 8, you can more simply write the following: 1 LocalTime now = LocalTime.now(); 2 LocalTime later = now.plus(8, HOURS); 12 Copyright 2014, Oracle and/or its affiliates. All rights reserved. Quelle:

13 Date and Time API JSR 310 Creation Creating new date and time objects is much easier and less error-prone in Java 8. Every class has static factory methods that are easy to understand For example, creating a new LocalDate for 17 th of July 2014 is as simple as: 1 date = LocalDate.of(2014, 7, 17); For more type-safety, you can use the new Month enum: 1 date = LocalDate.of(2014, Month.JULY, 17); You can also easily create a LocalDateTime from an instance of LocalDate: 1 LocalTime time = LocalTime.of(23, 59, 0); 2 LocalDateTime datetime = date.attime(time); You could also use any of the following methods (on LocalDate): attime(int hour, int minute) attime(int hour, int minute, int second) attime(int hour, int minute, int second, int nanoofsecond) Every class also has the now()method, which corresponds the moment (or date) it is called 13 Copyright 2014, Oracle and/or its affiliates. All rights reserved. Quelle:

14 Date and Time API JSR 310 java.time API Packages Package java.time java.time.chrono java.time.format java.time.temporal java.time.zone Description The main API for dates, times, instants, and durations Generic API for calendar systems other than the default ISO Provides classes to print and parse dates and times Access to date and time using fields and units, and date time adjusters Support for time-zones and their rules 14 Copyright 2014, Oracle and/or its affiliates. All rights reserved. Quelle:

15 Date and Time API JSR 310 Basisklassen im Package java.time Klasse Beschreibung Clock A clock providing access to the current instant, date and time using a time-zone. Duration A time-based amount of time, such as '34.5 seconds'. Instant An instantaneous point on the time-line. LocalDate A date without a time-zone in the ISO-8601 calendar system, such as LocalDateTime A date-time without a time-zone in the ISO-8601 calendar system, such as T10:15:30. LocalTime A time without time-zone in the ISO-8601 calendar system, such as 10:15:30. MonthDay A month-day in the ISO-8601 calendar system, such as OffsetDateTime A date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as T10:15:30+01:00. OffsetTime A time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as 10:15:30+01:00. Period A date-based amount of time in the ISO-8601 calendar system, such as '2 years, 3 months and 4 days'. Year A year in the ISO-8601 calendar system, such as YearMonth A year-month in the ISO-8601 calendar system, such as ZonedDateTime A date-time with a time-zone in the ISO-8601 calendar system, such as T10:15:30+01:00 Europe/Paris. ZoneId A time-zone ID, such as Europe/Paris. ZoneOffset A time-zone offset from Greenwich/UTC, such as +02: Copyright 2014, Oracle and/or its affiliates. All rights reserved. Quelle:

16 Larger Security Policy Areas SA / CPU RSS Feeds Security Blog eblasts Java.com Security Deployment Communications Lifecycle Security Architecture Review Peer Review Security Testing Post Mortems Remediation CPU Security Alerts 16 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

17 Java Critical Patch Updates Rules for Java CPU s Main release for security vulnerabilities Covers all JDK families (8, 7, 6, 5.0) CPU release triggers Auto-update Dates published 12 months in advance Security Alerts are released as necessary Based off the previous (non-cpu) release Released simultaneously on java.com and OTN JDK 8u20 - Security Baselines JRE Family Version JRE Security Baseline (Full Version String) _ _ _ _71 17 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

18 Java Security Resource Center What s new New Secure Coding Guidelines Java 8 Security Enhancements JavaOne 2014 Java Security Track Manage multiple versions on client systems Exception Site List and Deployment Rule Set RIA Checklist OpenJDK Security Group Information Security for Developers 18 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

20 Java Flight Recorder How is it built? Information gathering Instrumentation calls all over the JVM Application information via Java API Collected in Thread Local buffers 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 20 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

21 Java Advanced Management Console Build for managing the Java clients in enterprises Automatically tracks Java applet and Java web Start application usage Enables management of deployment rules Deployment Rule Sets - Desktop Administrators can control multiple Java versions Lots of managed clients Different applications need different Java versions and different users need several at once Mitigate risk of security by limiting the exposure of old versions Controlling Compatibility with Deployment Rule Sets This application needs JDK 8u20, that needs JDK 6u38, those need JDK 7u40 Blocking Applications with Deployment Rules Block configurations are whitelist or blacklist Use old version only for known-safe programs 21 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

23 JavaFX via Open Source im JDK 8 Open Source OpenJFX Project under OpenJDK First phase to focus on UI Controls Übergang Common license with Java SE JavaFX included in Java SE with JDK 8 JavaFX for Java SE Embedded (ARM) Standardisierung Oracle committed to JavaFX standardization JSR to be submitted through JCP and JSR expected for JDK 9 23 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

24 JavaFX ist die strategische Java-UI-Technologie für Rich-Client-Anwendungen Einheitliche Applikationsentwicklung für Java- und Web-Anwendungen Browser Plug-in, Web Start, Native Executables Hardware Accelerated Graphics (DirectX, OpenGL) JavaFX wird mit HTML-DOM ausgestattet JavaFX mit WebView für HTML5 Features (Web Sockets, offline Browsing, lokale Datenbank) Leistungsfähige JavaScript Engine JavaFX als Applet eingebettet in einer Web-Seite lauffähig JavaFX 2.0 Plattform Sprachwechsel vollzogen Java als native Sprache - anstatt JavaFX Script JavaFX APIs in Java implementiert Vorteile bei Verwendung von Generics, Annotations und Multithreading für JavaFX JavaFX 8 im JDK 8 enthalten und mit NetBeans 8 unterstützt Migrationspfad für Swing- und SWT-basierte Anwendungen JFXPanel Komponente ermöglicht das Einbinden von JavaFX Anwendungen in Swing Open Source mit OpenJFX und im JCP standardisiert JavaFX Scene Builder 2.0 GA 24 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

25 JavaFXPorts: JavaFX on Mobile and Tablets Package your JavaFX Application for deployment on ios and Android JavaFX on client, desktop, laptop and embedded systems JavaFX on mobile and tablets Why is a port needed? - Isn't Java Write Once Run Anywhere? OpenJDK 25 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

26 Compact-Profile für festgelegten Speicherbedarf RI Binaries under the GNU General Public License version 2 and under the Oracle Binary Code License Compact Profile 1 (13.8 MB) Compact Profile 2 (17.5 MB) Compact Profile 3 (19.5 MB) 26 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

27 Compact-Profile mit 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 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 27 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

28 Compact-Profile Neue Option für 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 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 28 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

30 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 30 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

31 Project Nashorn Leistungsfähigkeit 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 is taking advantage of invokedynamic instruction to permit "efficient and flexible execution" in a dynamic environment such as JavaScript mytext 31 Copyright 2014, Oracle and/or its affiliates. All rights reserved. Quelle:

33 Java SE Roadmap JDK 7u21 Java Client Security Enhancements JDK 7u40/45/51/55 Java Flight Recorder in JDK Native Memory Tracking Java Discovery Protocol App Store Packaging Tools JDK 8 GA18 th 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 8.2 JDK 9 Jigsaw Interoperability Optimizations Cloud Ease of Use JavaFX JSR NetBeans IDE 7.3 New hints and refactoring Scene Builder support Scene Builder 1.1 Linux support 33 Copyright 2014, Oracle and/or its affiliates. All rights reserved. NetBeans IDE 8 JDK 8 support Scene Builder 2.0 support Scene Builder 2.0 JavaFX 8 support Enhanced Java IDE support NetBeans IDE 9 JDK 9 support Scene Builder 3.0 support Scene Builder 3.0 JavaFX 9 support

34 JDK 8 Update 40 Early Access Release 8u40 Build b02 Feedback forum Report Bugs Changes in JDK 8u40 Build b02 These early access release downloads of the JRE and JDK are based on code available on OpenJDK at the time they were built and might not include the latest security patches 34 Copyright 2014, Oracle and/or its affiliates. All rights reserved.

35 Zusammenfassung Java SE 8 enthält neue Funktionalität Language Libraries JVM Java entwickelt sich kontinuierlich weiter jdk8.java.net openjdk.java.net/jeps 35 Copyright 2014, Oracle and/or its affiliates. All rights reserved.