Tuesday Jul 15, 2014
Friday Feb 07, 2014
By Joni Gordon-Oracle on Feb 07, 2014
The deployment guide for Rich Internet Applications (RIAs) has been reorganized and relevant information from the obsolete pre-6u10 deployment and plugin guides has been updated and included. The obsolete guides have been removed from the JDK 7 documentation set and replaced with pages that direct you to the Java Rich Internet Applications Guide.
Due to the reorganization, the URL for some pages has changed. If you get a Page Not Found error, please use the Table of Contents for the Java Rich Internet Applications Guide to locate the page.
Thursday Oct 03, 2013
By Sharon Zakhour on Oct 03, 2013
There are several advantages to signing a JNLP file. It will:
- Ensure that others cannot change the content in your JNLP file. For example, by adding a random library, or changing application information.
- Allow the use of arbitrary Java Virtual Machine (JVM) options and Java system properties in your application.
- Prevent others from referencing your JAR file directly in their HTML browser applets.
To create a signed JNLP file you don't sign the JNLP file itself, but you include the JNLP file inside the directory structure before the JAR file is created and then signed. The JNLP file must be named APPLICATION.JNLP and is included in the JNLP-INF subdirectory. The JAR file is then created and signed in the usual manner. When a web start application is started, the JNLP file used must be identical to the JNLP file in the signed JAR in order for the application to run.
Note that you cannot use the APPLET tag to run an applet if JAR file contains a signed JNLP file.
The Signing and Verifying JAR Files lesson in the Java Tutorial explains how to sign a JAR file.
Thursday Sep 26, 2013
By azhebel on Sep 26, 2013
On Tuesday, September 24, Marcus Hirt (Oracle) gave his presentation at JavaOne 2013 entitled Oracle Java Mission Control: Java Flight Recorder Deep Dive. Java Flight Recorder is the main profiling tool in Java Mission Control starting from the latest release of Oracle JDK 7 update 40. Java Flight Recorder originated from JRockit Flight Recorder as part of the convergence between the HotSpot and Oracle JRockit JVMs.
For more information about Oracle Java Mission Control, see the JMC User's Guide.
For more information about Java Flight Recorder, see the JFR Runtime Guide.
Wednesday Sep 25, 2013
By Raymond Gallardo-Oracle on Sep 25, 2013
Staffan Larsen, Java Serviceability Architect, Oracle, presented the conference Java Flight Recorder Behind the Scenes [CON5091] , which discusses in detail a new diagnostics tool that is available in the latest JDK 7 update. For more information about this tool, see the Java SE Java Flight Recorder Runtime Guide in the Java SE 7 Documentation.
Tuesday Sep 24, 2013
By azhebel on Sep 24, 2013
On Monday, September 23, Marcus Hirt (Oracle) gave his first presentation at JavaOne 2013 entitled Production-Time Profiling Out of the Box. He talked about the latest addition to JDK 7: Oracle Java Mission Control, a tool suite for low-overhead production-time profiling and diagnostics that originated with the JRockit Mission Control. As part of the convergence between the HotSpot and Oracle JRockit JVMs, Oracle Java Mission Control is now available in the HotSpot JDK.
For more information about Oracle Java Mission Control, see the JMC User's Guide.
Thursday Jul 18, 2013
By Sowmya Kannan-Oracle on Jul 18, 2013
Hello Students! Hope you are enjoying your summer vacation! Summer trips are done, and I bet you've asked your parents the question they dread most - "I am bored. What do I do now?" :-)
If you are looking for ways to get the brain's juices flowing or just getting a head start on a high school AP computer science course, Java Tutorials are a great resource!
The following learning paths are perfect for students in middle school or high school.
Get set, go!
See the trails mentioned next for information about installing an IDE, learning the basics, and writing code with the help of code examples.
- Getting Started – An introduction to Java technology and lessons on installing Java development software and using it to create a simple program.
- Learning the Java Language – Lessons describing essential concepts such as classes, objects, inheritance, datatypes, conditions, loops, control flow, and more. You can skip over the generics lesson at the beginning and come back to it later after you feel comfortable with the language.
- Essential Java Classes – Lessons on exceptions, basic input/output, concurrency, regular expressions, and the platform environment.
I am a visual person!
Check out JavaFX and SceneBuilder documentation to learn about developing animations and cool new apps!
I love it! What's next?
See the Java Tutorials Learning Paths page to learn more!
Good luck!- Sowmya
Thursday Apr 25, 2013
By Aredko-Oracle on Apr 25, 2013
Alla Redko from the Java Documentation team shares her impressions of the two-day developer conference in Moscow.
All the JavaOne conferences start with the keynotes and this time wasn't an exception. The conference hall was crowded with the developers from different local and international IT companies. Grigori Labzovsky and Valery Lanovenko, the directors of St. Petersburg and Moscow Oracle sites, cordially greeted the participants and set the tone of the event. They passed the baton to Nandini Ramani who launched the JavaOne Russia conference and announced Oracle strategy and roadmap for the Java technologies. Technical keynote presentations led by Stephen Chin started with the Kiosk demonstration, continued by the overview of the Embedded technologies and an excellent success story of using Java ME 3.2, and concluded with the bright JavaFX 3D presentation given by Jim Weaver.
The Java Client Technologies track started shortly after the keynote with the presentation about the new FX Features in JDK 8 by Jim Weaver. He gave an overview of the new FX capabilities, demonstrated the Metronome demo, and explained how developers could benefit from using Lambda Expressions. Being a professional technology ambassador, Jim presented with passion and enthusiasm actively encouraging developers to join the FX community and participate in the OpenJFX project.
Sergey Troshin and Andrey Petushkov from St. Petersburg Development Center gave a presentation about the Java ME Embedded technologies. They talked about the diversity of mobile devices, introduced the benefits that Java has brought to the embedded world, and provided solutions for Java optimization for embedded environments. I was particularly pleased with the fact that Sergey and Andrey named the docs.oracle.com/javame as the key source of information about Java ME technologies and products.
The second day of the conference started with Rapsberry Pi Nighthacking by Stephen Chin. Because the number of participants was relatively small, he turned the presentation into an informal discussion and live demonstration that were cordially received by the audience. Everyone in the hall was impressed with the demo run on Raspberry Pi and Chalkboard Electronics Touchscreen (tablet).
Jim Weaver continued presenting at the Java Client Technologies track and totally captivated participants with the presentation about powerful capabilities of JavaFX 3D. He showed how to create 3D primitive shapes, apply materials and textures, map images to the shapes. If you’re thinking about creating a cylindrical or cubic representation of the Earth, ask Jim!
Daniel Blaukopf, talked about Java SE on embedded devices. What impressed me the most was that his presentation had been developed totally in JavaFX (instead of traditional Microsoft Power Point) and run on a Raspberry Pi. Daniel gave an overview of the Java SE Embedded platform, demonstrated the supported devices and proof concepts, and showed a live JavaFX application running on a Raspberry Pi.
The last but not the least conference event was the hands-on-lab with the title “Playing to the Strength of JavaFX and HTML5” given by Jim Weaver. Because the hands-on-lab was based on the WebView tutorial that is part of JavaFX documentation, Jim invited me to assist. It has been a great and totally new experience helping about the lab and answering tricky but interesting questions.
Monday Apr 22, 2013
By cindyca on Apr 22, 2013
A new JavaFX Scene Builder 1.1 developer preview documentation, Using Scene Builder with Java IDEs, has been published on http://docs.oracle.com/javafx. It describes how you can use NetBeans IDE, Eclipse, and IntelliJ IDEA to easily create a JavaFX project and edit an FXML file with Scene Builder to build your application's UI.
You can download the latest Scene Builder 1.1 developer preview build from the JavaFX Scene Builder Developer Preview Download page. Use the Scene Builder 1.1 Developer Preview Release Notes for information about system requirements, installation information, and new or modified features.
Tuesday Apr 16, 2013
By Joni Gordon-Oracle on Apr 16, 2013
The Java Development Kit 7 Update 21 (JDK 7u21) release, which includes JavaFX 2.2.21, is now live. You can download it from the Java SE Downloads page.
With 7u21, it is recommended that all applications be signed, and it is possible to restrict signed applications to the security sandbox. Therefore, the use of "unsigned" to mean an application that ran in the security sandbox and "signed" to mean an application that ran with extended permissions, is no longer meaningful. The terminology in the Java Tutorials and the Java SE Guides has been changed to use "sandbox application" for applications that are restricted to the security sandbox, and "privileged application" for applications that have extended permissions.
In addition, the Java Tutorials contain the following changes:
With 7u21, users are prompted for permission to run applets and Java Web Start applications, called Rich Internet Applications or RIAs. The prompts contain information to help users make a more informed decision about whether to run an RIA. See User Acceptance of RIAs for more information.
Signed applets can be restricted to the security sandbox by using the permissions attribute for the <applet> or <object> element when the applet is invoked. See Deploying with the Applet Tag for more information.
The Java Rich Internet Applications Development and Deployment Guide, including the Deployment ebook (both MOBI and EPUB formats), contains the following changes:
The Security Level setting in the Java Control Panel can be used to automatically block some types of RIAs. The default setting of High permits all but local applets to run on a secure JRE. If the user is running an insecure JRE, only RIAs that are signed with a certificate issued by a recognized certificate authority are allowed to run. See Security for information.
Screen shots and other information about the Java Control Panel have been updated. See Java Control Panel for information.
The Java Remote Method Invocation (RMI) Guide contains information on the
java.rmi.server.useCodebaseOnly property, which is now set to
true by default. See RMI Enhancements for information.
Deploying JavaFX Applications contains changes related to the policy of signing applications and working with applications that are restricted to the security sandbox or have extended permissions.
JDK 8 Updates
As part of the ongoing Project Lambda work for Java SE 8, there is a new page on Method References that includes a new MethodReferencesTest.java example (which requires the early access release of JDK 8 with Lambda support to compile).
Another feature coming to Java SE 8 is the ability to invoke methods that use the fork/join framework to sort arrays in parallel. The Arrays and Fork/Join pages have been updated with information on manipulating arrays.
Wednesday Mar 06, 2013
By Sowmya Kannan-Oracle on Mar 06, 2013
- New file I/O API (NIO.2) and migrating legacy code to the new API
- Fork Join pool
- Project Coin: try-with-resources statement, binary literals, diamond syntax
- Updates to Generics tutorial
- Expanded deployment coverage (applets, java web start applications)
- Preparing for Java Programming Language Certification - A mapping of Java certification objectives to sections of the Java Tutorials.
Monday Jan 14, 2013
By Sharon Zakhour on Jan 14, 2013
The JDK 7u11 release is now live.
Introduced in the 7u10 release, the slider in the Java Control Panel (JCP) is used for setting the security level of apps launched in the browser (via Java Plugin). With the 7u11 release, the default security level setting has been changed from Medium to High.
For more information:
Friday Oct 26, 2012
By Sharon Zakhour on Oct 26, 2012
The recent Java Mac OS X 2012-006 update from Apple removes the Apple Java 6 plug-in from your Mac. The Mac OS X Install FAQ will be updated with the next 7u release, but you may find the following information useful in the meantime.
Q: I have installed Java for OS X 2012-006 and Apple Java 6 can no longer be used for applets or Web Start. How do I get it back?
A: The Java for OS X 2012-006 update from Apple uninstalls the Apple-provided Java applet plug-in from all web browsers. You can download the latest version of Java from Oracle, which has improved security, reliability and compatibility.
If you prefer to continue using Apple's Java 6 plug-in, you can follow the steps provided in How to re-enable the Apple-provided Java SE 6 applet plug-in and Web Start functionality.
Q: After installing Java for OS X 2012-006, can I continue to use Apple's Java 6 alongside the OS X JDK or JRE for Java 7?
A: If you want to continue to develop with Java 6 in a Terminal window you can modify the startup script for your favorite command environment. For bash, use this:
export JAVA_HOME=`/usr/libexec/java_home -v 1.6`
Some applications use /usr/bin/java to invoke Java. After installing Java for OS X 2012-006, /usr/bin/java will find the newest JDK installed, and will use that for all of the Java related command line tools in /usr/bin. You may need to modify those applications to find Java 6, or contact the developer for a newer version of the application.
Also, this update removes Apple provided Java Preferences app. For more information on how to determine the default version of Java on your system, see Determining the Installed Version of the JRE in the JRE 7 Installation for Mac OS X page.
Wednesday Oct 10, 2012
By Sowmya Kannan-Oracle on Oct 10, 2012
The JavaOne 2012 session titled Java Certifications: Learn, Pass, and Teach also provides more information.
Monday Oct 08, 2012
By Sowmya Kannan-Oracle on Oct 08, 2012
To learn more about using JDBC to develop database applications, see the JDBC trail in the Java Tutorials.
You will know how to use the basic JDBC API to
* create tables
* insert values into them
* query the tables
* retrieve the results of the queries
* update the tables
In this process, you will learn how to use simple statements and prepared statements, and see an example of a stored procedure. You will also learn how to perform transactions and how to catch exceptions and warnings.
Blog about Java technology documentation and news about Java releases.
- JDK 8 Massive Open and Online Course: Lambdas and Streams Introduction
- Upcoming presentation on the standard module system for JDK 9
- Oracle Java Card 3 Platform, Classic Edition, version 3.0.5 is now available
- Java ME Embedded 8.1 Adds Support for STMicroelectronics
- Welcome to Jigsaw and JDK 9
- JDK 8u45, 7u79 and 7u80 Released!
- JDK 8u40 Released!
- JDK 8u31, 7u75 and 7u76 Released !
- Java Tutorials Sixth Edition Book Released!
- Java EE 7 Docs Have a New Look!