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  • android include tag - invalid layout refernce

    - by Dalibor Frivaldsky
    Hello, I'm having a problem including a different layout through the include tag in the android layout xml file. When specifing the layout reference ( @layout/... ), i'm getting a InflateException in the Eclipse ADT with the following error: InflateException: You must specifiy a valid layout reference. The layout ID @layout/func_edit_simple_calculator_toolbox is not valid. the reference should be valid, as I've selected it from the the list of my other layouts and didnt type it in. I'm using android sdk v2.1 these are the layout files func_edit_simple_calculator_toolbox.xml <?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:layout_width="wrap_content"> <TableRow android:id="@+id/TableRow01" android:layout_width="wrap_content"android:layout_height="wrap_content"> <Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="1"></Button> <Button android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="2"></Button> <Button android:id="@+id/Button03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="3"></Button> <Button android:id="@+id/Button04" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="+"></Button> </TableRow> <TableRow android:id="@+id/TableRow02" android:layout_width="wrap_content" android:layout_height="wrap_content"> <Button android:id="@+id/Button05" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="4"></Button> <Button android:id="@+id/Button06" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="5"></Button> <Button android:id="@+id/Button07" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="6"></Button> <Button android:id="@+id/Button08" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="-"></Button> </TableRow> </TableLayout> function_editor_layout.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <com.calculoid.FunctionView android:id="@+id/function_view" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <include android:id="@+id/include01" android:layout_width="wrap_content" android:layout_height="wrap_content" layout="@layout/func_edit_simple_calculator_toolbox"></include> </LinearLayout> Does any one know what could be the problem? thanks in advance

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  • See you at OSCON!

    - by darcy
    In just under a month, I'll be speaking at the OSCON Java conference about various OpenJDK and JDK 7 matters: JDK 7 in a Nutshell The State of JDK and OpenJDK More detailed talks on those topics include Stuart's session on Coin in Action: Using New Java SE 7 Language Features in Real Code and Dalibor's OpenJDK – When And How To Contribute To The Java SE Reference Implementation. See you in Portland!

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  • Java Spotlight Episode 77: Donald Smith on the OpenJDK and Java

    - by Roger Brinkley
    Tweet An interview with Donald Smith about Java and OpenJDK. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Jersey 2.0 Milestone 2 available Oracle distribution of Eclipse (OEPE) now supports GlassFish 3.1.2 Oracle Linux 6 is now part of the certification matrix for 3.1.2 3rd part of Spring -> Java EE 6 article series published Joe Darcy - Repeating annotations in the works JEP 152: Crypto Operations with Network HSMs JEP 153: Launch JavaFX Applications OpenJDK bug database: Status update OpenJDK Governing Board 2012 Election: Results jtreg update March 2012 Take Two: Comparing JVMs on ARM/Linux The OpenJDK group at Oracle is growing App bundler project now open Events April 4-5, JavaOne Japan, Tokyo, Japan April 11, Cleveland JUG, Cleveland, OH April 12, GreenJUG, Greenville, SC April 17-18, JavaOne Russia, Moscow Russia April 18–20, Devoxx France, Paris, France April 17-20, GIDS, Bangalore April 21, Java Summit, Chennai April 26, Mix-IT, Lyon, France, May 3-4, JavaOne India, Hyderabad, India May 5, Bangalore, Pune, ?? - JUG outreach May 7, OTN Developer Day, Mumbai May 8, OTN Developer Day, Delhi Feature InterviewDonald Smith, MBA, MSc, is Director of Product Management for Oracle. He brings worldwide enterprise software experience, ranging from small "dot-com" through Fortune 500 companies. Donald speaks regularly about Java, open source, community development, business models, business integration and software development politics at conferences and events worldwide including Java One, Oracle World, Sun Tech Days, Evans Developer Relations Conference, OOPSLA, JAOO, Server Side Symposium, Colorado Software Summit and others. Prior to returning to Oracle, Donald was Director of Ecosystem Development for the Eclipse Foundation, an independent not-for-profit foundation supporting the Eclipse open source community. Mail Bag What’s Cool OpenJDK 7 port to Haiku JEP 154: Remove Serialization Goto for the Java Programming Language

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  • Java Spotlight Episode 84: Anil Gaur on JavaEE 7

    - by Roger Brinkley
    Tweet Interview with Anil Gaur, VP of Java Platform for Enterprise Edition and GlassFish Server, on JavaEE 7. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Tori Wieldt - Judges Selected for Duke's Choice Awards Donald Smith - #OpenJDK interview in Java Magazine Henrik Ståhl - Java 7 adoption at 23% JavaOne Kicks Off with Sunday Keynotes at Masonic Auditorium Jersey 2.0 M4 JSF 2.2 Latest Snapshot NetBeans IDE 7.2 - Deploy to Cloud Events May 30, OTN Java Developer Day, Redwood Shores June 11-14, Cloud Computing Expo, New York City June 12, Boulder JUG June 13, Denver JUG June 13, Eclipse Juno DemoCamp, Redwoood Shore June 13, JUG Münster June 14, Java Klassentreffen, Vienna, Austria June 18-20, QCon, New York City June 26-28, Jazoon, Zurich, Switzerland July 5, Java Forum, Stuttgart, Germany July 30-August 1, JVM Language Summit, Santa Clara Feature InterviewAnil Gaur is the Vice President of Java Platform, Enterprise Edition, and GlassFish Server at Oracle in the Fusion Middleware Group. Is responsible for creation of Java EE Specifications, Reference Implementation, and Compatibility Test Suites. Leading the evolution on Java EE into Cloud and PaaS environment through the Java EE 7 standard. Prior to that, managed the delivery of Java EE 6 Platform and SDK which quickly gained momentum in enterprise application development and deployments. In this episode we talk about GlassFish 3.1 release. Mail Bag What’s Cool RFR (L): Adding core file parsing on Mac OS X to SA Sergio Del Valle @swdelvalle is the 1,000 @JavaSpotlight twitter follower

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  • Java Spotlight Episode 35: JVM Performance and Quality

    - by Roger Brinkley
    Tweet Interview with Vladimir Ivanov, Ivan Krylov, Sergey Kuksenko on the JDK 7 Java Virtual Machine performance and quality. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador, and Alexis Moussine-Pouchkine, Java EE Developer Advocate. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News Java 7 Launch Event GlassFish 3.1.1 re-planning done, first RC on July 7th, lots of component updates following customer and community feedback Mojarra 2.1.2 is here, just a little ahead of the GlassFish 3.1.1 release. In other JSF-related news, JSF 2.0 has a first expert draft New OpenJDK Project proposed: JDK 7 Update Events June 20-23 JAX, San Jose, CA June 21 Java + MySQL Webinar at 9:00 AM PDT June 21-23 JaZoon, Zurich, Switzerland June 22nd and 28th GlassFish Webinars (one in Portuguese) June 29-July 2 12th Forum Internatioal Software Livre, Porto Alegre, Brazil July 3, Sao Jose do Rio Preto, Brazil July 5, Brasilia, Brazil (DFJUG) July 6, Goiania, Brazil (GOJava) July 6-10 The Developers Conference, Sao Paulo, Brazil July 7 Java 7 Launch Event live in Redwood Shores, CA; Sao Paulo, BR; London, England. July 9, Joao Pessoa, Brazil (PBJUG) July 11, Natal, Brazil (JavaRN) July 14, Fortaleza, Brazil (CEJUG) July 16, Salvador, Brazil (JavaBahia) July 19, Toledo, Brazil (UNIPAR) July 21, Maringa, Brazil (RedFoot) Feature interview This weeks feature interview is with Vladimir Ivanov, HotSpot JVM Quality Engingeer;  Ivan Krylov, Licensee Engineering;  and Sergey Kuksenko, Java SE Performance Team on the JDK 7 Java Virtual Machine peformance and quality. What's Cool Ongoing OpenJDK Bylaws ratification results Show Transcripts Transcript for this show is available here when available

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  • Java Spotlight Episode 89: Geoff Morton on Java Embedded

    - by Roger Brinkley
    Interview with Geoff Morton, Group Vice President, Worldwide Java Sales at Oracle , on Java embedded. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News EclipseLink 2.4 Hands-on FREE GlassFish Course NetBeans IDE 7.2 RC1 Hamish Morrison: OpenJDK Haiku port: quarter term report Proposed Update to the OpenJDK Web Site Terms of Use JavaOne Embedded Oracle Java ME Embedded Client (OJEC) 1.1 release on OTN New Videos Understanding the JVM and Low Latency Applications 55 New Things in Java 7 - Concurrency Events July 5, Java Forum, Stuttgart, Germany Jul 12, Java EE 6 workshop at Mindtree, Bangalore Jul 13-14, IndicThreads, Delhi July 30-August 1, JVM Language Summit, Santa Clara Feature InterviewGeoff Morton is the Group Vice President, Worldwide Java Sales at Oracle. Mail Bag What’s Cool Duke’s Choice Awards decision is going on Java Champions Facebook Page Joe Darcy: Moving monarchs and dragons: migrating the JDK bugs to JIRA Mike Duigou: Updated Lambda Binary Drops Mark Reinhold: Mercurial "jcheck" extension now available

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  • Today's Links (6/21/2011)

    - by Bob Rhubart
    Keeping your process clean: Hiding technology complexity behind a service | Izaak de Hullu Izaak de Hullu offers a solution to "technology pollution like exception handling, technology adapters and correlation." WebLogic Weekly for June 20th, 2011 | James Bayer James Bayer presents "a round-up what has been going on in WebLogic over the past week." Publish to EDN from Java & OSB with JMS | Edwin Biemond Busy blogger and Oracle ACE Edwin Biemond shows "how you can publish events from Java and OSB." How is HTML 5 changing web development? | Audrey Watters - O'Reilly Radar In this interview, OSCON speaker Remy Sharp discusses HTML5's current usage and how it could influence the future of web apps and browsers. SOA Governance Book | SOA Partner Community Blog Information on how those in EMEA can win a free copy of SOA Governance: Governing Shared Services On-Premise and in the Cloud by Thomas Erl, et al. Keeping The Faith on 11i | Floyd Teter "The iceberg is melting, the curtain is coming down, the lights are dimming, the fat lady is singing," says Oracle ACE Director Floyd Teter. Configure and test JMS based EDN in SOA Suite 11g | Edwin Biemond Oracle ACE Edwin Biemond shows you "how to configure EDN-JMS and how to publish an Event to this JMS Queue." Choosing the best way for SOA Suite and Oracle Service Bus to interact with the Oracle Database | Lucas Jellema Oracle ACE Director Lucas Jellema illustrates "over 20 different interaction channels" covering "a fairly wild variation of attributes, required skills, productivity and performance characteristics." Oracle Data Integrator 11.1.1.5 Complex Files as Sources and Targets | Alex Kotopoulis ODI 11.1.1.5 adds the new Complex File technology for use with file sources and targets. The goal is to read or write file structures that are too complex to be parsed using the existing ODI File technology. Java Spotlight Podcast Episode 35: JVM Performance and Quality Featuring an interview with Vladimir Ivanov, Ivan Krylov, and Sergey Kuksenko on the JDK 7 Java Virtual Machine performance and quality. Also includes the Java All Star Developer Panel featuring Dalibor Topic, Java Free and Open Source Software Ambassador, and Alexis Moussine-Pouchkine, Java EE Developer Advocate.

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  • Devoxx 2011 Started Today

    - by Yolande
    Devoxx 2011, organized by Java user group in Belgium, is the biggest Java conference in Europe. The first two University Days set the tone for the weeklong conference with its in-depth technical sessions lead by luminaries from the Java community and industry experts. Each day is a great mix of 3 hour sessions and hands-on labs, 30 minute Tools-in-Action sessions giving tips for faster and better application development and the traditional Birds-of-a-Feather sessions in the evening. Java sessions for today and tomorrow: - Next Gen Enterprise Apps - Bert Ertman and Paul Bakker talked about new Java EE 6 APIs that reduces the need for boilerplate code and configuration. - JavaFX 2.0 – A Java developer’s guide - Stephen Chin and Peter Pilgrim will give an overview of new version and how Java developers can take advantage of it - Java Rich Clients with JavaFX 2.0 - Richard Bair and Jasper Potts will get into JavaFX 2.0 APIs - Building an end-to-end application using Java EE 6 and NetBeans - Arun Gupta will showcase how to write Java EE 6 applications more effectively. - The OpenJDK Community BOF with Dalibor Topic Starting Tuesday, come by the Oracle booth to chat about technology, enter our raffle and have a beer every day at 18:45 The sessions will be available on Parleys website after the conference. In the meantime, you can learn a lot about those Java technologies on our website: - JavaFX 2.0 tutorials and documentation - OpenJDK - News from the GlassFish community - JavaEE 6 resources - JavaOne sessions

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  • JavaOne Russia: Great Line Up

    - by Geertjan
    I'm (we're) in New York, a week of vacation. (Growing list of photos can be found here.) A week in Brooklyn, and around, flea markets, book stores, museums, music. One of several highlights will be seeing "Death of a Salesman" with Philip Seymour Hoffman in the main role, tomorrow. However, mentally, at least partly, I'm in Moscow, at JavaOne Moscow, 17 & 18 April. http://www.oracle.com/javaone/ru-en/index.html I'm doing two items there, thankfully on the first day, I always think the sooner the better: Tuesday 12:30 - 13:15 -- Unlocking the Java EE 6 Platform (in the Keynote Hall) Tuesday 16:30 - 18:15 -- Rapid Corporate Desktop Development (in HOL Room) Several speakers I'm looking forward to seeing there include Bert Ertman who will be talking about Spring/Java EE 6 migration, Dalibor Topic talking about Lambda expressions in JDK 8, Arun Gupta with his Java EE 6 HOL (appears to be a partial overlap with my session), and various others. And I hope I will make it to Angela Caicedo's HOL on JavaFX. The whole program, which is available via the link above, indicates that many (dare I say "most"?) of the sessions will be using NetBeans in one way or another. Looks like it will be a great conference.

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  • Java Spotlight Episode 58: Peter Korn and Ofir Leitner on ME Accessibility

    - by Roger Brinkley
    Tweet Interview with Peter Korn and Ofir Leitner on Mobile and Embedded Accessibility. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Alexis Moussine-Pouchkine, Java EE Developer Advocate. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News Announcing Oracle WebLogic 12c Geronimo 3 beta - Another Apache project now compatible with Java EE 6 NetBeans 7.1 RC1 is out JavaFX links of the weeks JavaFX videos on Parleys: Nicolas Lorain's Introduction to JavaFX 2.0 from JavaOne 2011 & Richard Bair on JavaFX Architecture and Programming Model Events Dec 4, SOUJava Geek Bike Ride 2011, Sao Paulo  Dec 5-7, UKOUG, Birmingham, UK Dec 6-8, Java One Brazil, Sao Paulo Dec 9 UAIJUG, Uberlandia Dec 9 CEJUG, Fortaleza/CE Dec 10 GUJAVA, Florianopolis Dec 10 ALJUG, Maceio/AL Dec 11 Javaneiros, Campo Grande/MS Dec 12 GOJAVA, Goiania/GO Dec 13 RioJUG, Rio de Janeiro Feature interview Peter Korn is Oracle's Accessibility Principal – their senior individual contributor on accessibility. He is also Technical Manager of the AEGIS project, leading an EC-funded €12.6m investment building accessibility into future mainstream ICT (FP7-ICT224348). Mr. Korn co-developed and co-implemented the Java Accessibility API, and developed the Java Access Bridge for Windows. He helped design the open source GNOME Accessibility architecture found on most modern UNIX and GNU/Linux systems, and consulted on accessibility support for OpenOffice.org, Firefox, Thunderbird, and other applications. Prior to Sun/Oracle, Peter co-developed the outSPOKEN for Windows screen reader. Mr. Korn represented Sun/Oracle on TEITAC for the Section 508/255 refresh, co-led the OASIS ODF Accessibility subcommittee, and sits on INCITS V2 where he is contributing to ISO 13066: defining AT-IT interoperability standards including specifically the Java Accessibility API. Ofir Leitner is the architect of one of LWUIT's key features - the HTMLComponent which allows rendering HTML within LWUIT applications and to embed web-flows inside apps. Ofir is also responsible for LWUIT's bidirectional and RTL support and for the accessibility work that is being done these days in LWUIT. Mail Bag What's Cool Devoxx 2011 (Alexis) Eclipsecon Europe Talk by Andrew Overholt: IcedTea & IcedTea-Web Geek bike ride & Rio 500 Twitter followers @JavaSpotlight Show Transcripts Transcript for this show is available here when available.

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  • Java Spotlight Episode 78: Jasper Potts on the JavaFX Scene Builder

    - by Roger Brinkley
    Tweet An interview with Jasper Potts about the new JavaFX Scene Builder. Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News JavaFX Scene Builder Developer Preview available for testing. Java EE Unlock the Java EE 6 Platform using NetBeans 7.1 Tuning GlassFish for Production JSF 2.2 Update from Ed Burns John Rose at Microsoft's Lang.NEXT summit Recording of John's Java 8 presentation Jeroen Frijters' presentation on IKVM.NET Martin Odersky's keynote JVM Language Summit 2012 July 30 – August 1; Oracle Santa Clara (same as last year) CFP coming in a few days JVM Language Summit 2011 Presentations & Recordings Proposed development schedule for JDK 8 Say hello to Mathias Axelsson Events April 11, Cleveland JUG, Cleveland, OH April 12, GreenJUG, Greenville, SC April 17-18, JavaOne Russia, Moscow Russia April 18–20, Devoxx France, Paris, France April 17-20, GIDS, Bangalore April 21, Java Summit, Chennai April 26, Mix-IT, Lyon, France, May 3-4, JavaOne India, Hyderabad, India May 5, Bangalore, Pune, ?? - JUG outreach May 7, OTN Developer Day, Mumbai May 8, OTN Developer Day, Delhi Feature InterviewJasper Potts is the Developer Experience Architect for the Java Client Group at Oracle. Responsible for technical design for everything thats sis on the core platform including Controls, Tools, Samples and Blueprints. Formally a lead engineer on the JavaFX & Swing teams working on the new JavaFX UI Controls and Graphics frameworks. Also responsible for designing, developing and presenting demos during the keynotes at JavaOne and Devoxx. A JavaOne Rockstar presenter having presented many sessions on JavaFX and Swing at many conferences. Prior to Sun he founded Xerto a desktop applications company developing Imagery a Java professional photo management application. In this interview Jasper talks about the recently release JavaFX Scene Builder. Mail Bag What’s Cool Contribute to GlassFish in Five Different Ways Stephen Chin and James Weaver join Oracle Adam Bien - Building Java FX 2 Libraries From Source With Maven 3 Paul Sandoz - Java Boomerang Building Jigsaw on Mac OS X using VirtualBox Mandy Chung: Jigsaw for Mac OS X

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  • Java Spotlight Episode 56: Stephan Jenssen, Java Champion, on Devoxx and Parleys

    - by Roger Brinkley
    Tweet Interview with Stephan Janssen, Java Champion, on Devoxx and Parleys Joining us this week on the Java All Star Developer Panel are Dalibor Topic, Java Free and Open Source Software Ambassador and Alexis Moussine-Pouchkine, Java EE Developer Advocate. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News Devoxx Live Recording of the Java Spotlight Podcast. Come be part of the live recording. November 18, 10:45am in BOF 1 room next to the info desk Wanted: Java Code Brainteasers Adopt a JSR Flash to Focus on PC Browsing and Mobile Apps; Adobe to More Aggressively Contribute to HTML5 First binary snapshots of Project Lambda are available JSF 2.2 recent progress - Early Draft Latest OEPE (11.1.1.8) - Eclipse 3.7.1-based  Events Nov 14-18 Devoxx, Antwerp Nov 15-17, DOAG, Nuremberg, Germany Nov 22-25, OTN Developer Days in the Nordics Nov 22-23, Goto Conference, Prague Dec 6-8, Java One Brazil, Sao Paulo Feature interview Stephan Janssen is a serial entrepreneur that has founded several successful organizations such as the Belgian Java User Group (BeJUG) in 1996, JCS Int. in 1998, JavaPolis in 2002 and now Parleys.com in 2006. He has been using Java since its early releases in 1995 with experience of developing and implementing real world Java solutions in the finance and manufacturing industries. Today Stephan is the CTO of the Java Competence Center at RealDolmen. He was selected by BEA Systems as the first European (independent) BEA Technical Director. He has also been recognized by the Server Side as one of the 54 Who is Who in Enterprise Java 2004. Sun has recognized in 2005 his efforts for the Java Community and has engaged him in the Java Champion project. He has spoken at numerous Java and JUG conferences around the world. Mail Bag What's Cool Increased interest in Mobile and Embedded topics, on the heels of the JavaOne announcements. Speaking engagements, etc PodFodder: John Duimovich on IBM & OpenJDK at JavaOne 2011 Oracle Releases Oracle Solaris 11, the First Cloud OS Show Transcripts Transcript for this show is available here when available.

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  • Mastering snow and Java development at jDays in Gothenburg

    - by JavaCecilia
    Last weekend, I took the train from Stockholm to Gothenburg to attend and present at the new Java developer conference jDays. It was professionally arranged in the Swedish exhibition hall close to the amusement park Liseberg and we got a great deal out of the top-level presenters and hallway discussions. Understanding and Improving Your Java Process Our main purpose was to spread information on JVM and our monitoring tools for Java processes, so I held a crash course in the most important terms and concepts if you want to affect the performance of your Java process. From the beginning - the JVM specification to interpretation of heap usage graphs. For correct analysis, you also need to understand something about process memory - you need space for the Java heap (-Xms for initial size and -Xmx for max heap size), but the process memory also contain the thread stacks (to a size of -Xss), JVM internal data structures used for keeping track of Java objects on the heap, method compilation/optimization, native libraries, etc. If you get long pause times, make sure to monitor your application, see the allocation rate and frequency of pause times.My colleague Klara Ward then held a presentation on the Java Mission Control product, the profiling and diagnostics tools suite for HotSpot, coming soon. The room was packed and very appreciated, Klara demonstrated four different scenarios, e.g. how to diagnose and fix latencies due to lock contention for logging.My German colleague, OpenJDK ambassador Dalibor Topic travelled to Sweden to do the second keynote on "Make the Future Java". He let us in on the coming features and roadmaps of Java, now delivering major versions on a two-year schedule (Java 7 2011, Java 8 2013, etc). Also letting us in on where to download early versions of 8, to report problems early on. Software Development in teams Being a scout leader, I'm drilled in different team building and workshop techniques, creating strong groups - of course, I had to attend Henrik Berglund's session on building successful teams. He spoke about the importance of clear goals, autonomy and agreed processes. Thomas Sundberg ended the conference by doing live remote pair programming with Alex in Rumania and a concrete tips for people wanting to try it out (for local collaboration, remember to wash and change clothes). Memory Master Keynote The conference keynote was delivered by the Swedish memory master Mattias Ribbing, showing off by remembering the order of a deck of cards he'd seen once. He made it interactive by forcing the audience to learn a memory mastering technique of remembering ten ordered things by heart, asking us to shout out the order backwards and we made it! I desperately need this - bought the book, will get back on the subject. Continuous Delivery The most impressive presenter was Axel Fontaine on Continuous Delivery. Very well prepared slides with key images of his message and moved about the stage like a rock star. The topic is of course highly interesting, how to create an infrastructure enabling immediate feedback to developers and ability to release your product several times per day. Tomek Kaczanowski delivered a funny and useful presentation on good and bad tests, providing comic relief with poorly written tests and the useful rules of thumb how to rewrite them. To conclude, we had a great time and hope to see you at jDays next year :)

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