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  • Raspberry Pi and Java SE: A Platform for the Masses

    - by Jim Connors
    One of the more exciting developments in the embedded systems world has been the announcement and availability of the Raspberry Pi, a very capable computer that is no bigger than a credit card.  At $35 US, initial demand for the device was so significant, that very long back orders quickly ensued. After months of patiently waiting, mine finally arrived.  Those initial growing pains appear to have been fixed, so availability now should be much more reasonable. At a very high level, here are some of the important specs: Broadcom BCM2835 System on a chip (SoC) ARM1176JZFS, with floating point, running at 700MHz Videocore 4 GPU capable of BluRay quality playback 256Mb RAM 2 USB ports and Ethernet Boots from SD card Linux distributions (e.g. Debian) available So what's taking place taking place with respect to the Java platform and Raspberry Pi? A Java SE Embedded binary suitable for the Raspberry Pi is available for download (Arm v6/7) here.  Note, this is based on the armel architecture, a variety of Arm designed to support floating point through a compatibility library that operates on more platforms, but can hamper performance.  In order to use this Java SE binary, select the available Debian distribution for your Raspberry Pi. The more recent Raspbian distribution is based on the armhf (hard float) architecture, which provides for more efficient hardware-based floating point operations.  However armhf is not binary compatible with armel.  As of the writing of this blog, Java SE Embedded binaries are not yet publicly available for the armhf-based Raspbian distro, but as mentioned in Henrik Stahl's blog, an armhf release is in the works. As demonstrated at the just-completed JavaOne 2012 San Francisco event, the graphics processing unit inside the Raspberry Pi is very capable indeed, and makes for an excellent candidate for JavaFX.  As such, plans also call for a Pi-optimized version of JavaFX in a future release too. A thriving community around the Raspberry Pi has developed at light speed, and as evidenced by the packed attendance at Pi-specific sessions at Java One 2012, the interest in Java for this platform is following suit. So stay tuned for more developments...

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  • Solution for developers wanting to run a standalone WLS 10.3.6 server against JDev 11.1.1.6.0

    - by Chris Muir
    In my previous post I discussed how to install the 11.1.1.6.0 ADF Runtimes into a standalone WLS 10.3.6 server by using the ADF Runtime installer, not the JDeveloper installer.  Yet there's still a problem for developers here because JDeveloper 11.1.1.6.0 comes coupled with a WLS 10.3.5 server.  What if you want to develop, deploy and test with a 10.3.6 server?  Have we lost the ability to integrate the IDE and the WLS server where we can run and stop the server, deploy our apps automatically the server and more? JDeveloper actually solved this issue sometime back but not many people will have recognized the feature for what it does as it wasn't needed until now. Via the Application Server Navigator you can create 2 types of connections, one to a remote "standalone WLS" and another to an "integrated WLS".  It's this second option that is useful because what we can do is install a local standalone WLS 10.3.6 server on our developer PC, then create a separate "integrated WLS" connection to the standalone server.  Then by accessing your Application's properties through the Application menu -> Application Properties -> Run -> Bind to Integration Application Server option we can choose the newly created WLS server connection to work with our application. In this way JDeveloper will now treat the new server as if it was the integrated WLS.  It will start when we run and deploy our applications, terminate it at request and so on.  Of course don't forget you still need to install the ADF Runtimes for the server to be able to work with ADF applications. Note there is bug 13917844 lurking in the Application Server Navigator for at least JDev 11.1.1.6.0 and earlier.  If you right click the new connection and select "Start Server Instance" it will often start one of the other existing connections instead (typically the original IntegratedWebLogicServer connection).  If you want to manually start the server you can bypass this by using the Run menu -> Start Server Instance option which works correctly.

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  • Hands On Workshop "APEX Mobile": Sommer 2013

    - by Carsten Czarski
    Anwendungen für Mobile Endgeräte sind derzeit in aller Munde - nahezu überall taucht die Anforderung "Unterstützung von Smartphones oder Tablets" auf. Wie die meisten wissen, werden mobile Endgeräte mit der aktuellen APEX Version 4.2 out-of-the-box unterstützt. Und mobile Anwendungen werden in typischer APEX-Manier schnell und einfach erstellt. Wie einfach das geht, können Sie nicht nur mit dem neuen Workshop Guide: APEX-Anwendungen für mobile Endgeräte selbst nachvollziehen, sondern auch in einem der APEX Mobile Hands On Workshops 'LIVE' erleben. Dort erfahren Sie ... Wie man eine APEX-Anwendung, basierend auf Tabellen erstellt APEX Komponenten wie Formulare, Berichte, Diagramme oder Kalender einbindet Wie man auf das GPS in einem Smartphone zugreift, die Koordinaten in der Datenbank speichern und damit arbeiten kann Wie man auf die Kamera zugreift, die Bilder speichert und einfache Bildoperationen durchführen kann Und vieles mehr ... Darüber hinaus ist natürlich auch Zeit für den Austausch und zur Diskussion vorgesehen. Details zu Agenda, Terminen und Workshop-Voraussetzungen finden Sie auf der Webseite. Die Teilnahme an der Veranstaltung ist kostenlos - melden Sie sich am besten gleich an.

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  • Pensez à notre site de web tv pour les partenaires !

    - by swalker
    Nous souhaitons vous remercier chaleureusement pour votre forte mobilisation autour du projet « Mini Studio ITPlace.tv ». Merci d’avoir répondu présent ! 14 Interviews Partenaires Des IA Channel dignes des plus grands journalistes du 20h Des partenaires ravis de pouvoir s’exprimer Des contenus de valeurs autour de nombreuses thématiques Un remerciement tout spécial pour Loïc qui a su mobiliser 5 de ses partenaires autour de thématiques que nous avons peu l’habitude d’adresser (solutions cross Apps/Tech, Sécurité, etc…). Nous reviendrons vers vous rapidement pour vous présenter les montages vidéos finaux, et voir avec vos partenaires comment utiliser au mieux ces médias. Pour vous connecter : http://www.itplace.tv

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  • JMX Monitoring of GlassFish Servers

    - by tjquinn
    Did you ever wonder what this message in your GlassFish server.log file means? JMXStartupService has started JMXConnector on JMXService URL service:jmx:rmi://192.168.2.102:8686/jndi/rmi://192.168.2.102:8686/jmxrmi It means you can monitor any GlassFish server process, remotely or locally, using any standard Java Management Extensions (JMX) client.  Examples: jconsole or jvisualvm.   Copy the part of the log message that starts with "service:" into the Add JMX Connection dialog of jvisualvm:  or into the New Connection dialog of jconsole: (The full string is truncated in the on-screen display, but if you copied from the server.log and pasted into the form it should all be there.) The examples above are for a DAS, and your host will probably be different.   The server.log files for other GlassFish servers (instances) will have similar log entries giving the JMX connection string to use for those processes.  Look for the host and/or port to be different. Note a few things about security: Here we've assumed you are using the default admin username and password.  If you are not, just enter a valid admin username and password for your installation.  Once connected, you have normal access to all the JVM statistics and controls. You can use JMX clients that support MBeans to view the GlassFish configuration.  When you connect to the DAS, you can also change that configuration, but you can only view configuration when you connect to an instance. To use a JMX client on one system to connect to a GlassFish server running on another system, you need to enable secure admin if you have not already done so: asadmin change-admin-password (respond to the prompts) asadmin enable-secure-admin asadmin restart-domain (as prompted in the output from enable-secure-admin)

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  • Virtual Lab part 2&ndash;Templates, Patterns, Baselines

    - by Geoff N. Hiten
    Once you have a good virtualization platform chosen, whether it is a desktop, server or laptop environment, the temptation is to build “X”.  “X” may be a SharePoint lab, a Virtual Cluster, an AD test environment or some other cool project that you really need RIGHT NOW.  That would be doing it wrong. My grandfather taught woodworking and cabinetmaking for twenty-seven years at a trade school in Alabama.  He was the first instructor hired at that school and the only teacher for the first two years.  His students built tables, chairs, and workbenches so the school could start its HVAC courses.   Visiting as a child, I also noticed many extra “helper” stands, benches, holders, and gadgets all built from wood.  What does that have to do with a virtual lab, you ask?  Well, that is the same approach you should take.  Build stuff that you will use.  Not for solving a particular problem, but to let the Virtual Lab be part of your normal troubleshooting toolkit. Start with basic copies of various Operating Systems.  Load and patch server and desktop OS environments.  This also helps build your collection of ISO files, another essential element of a virtual Lab.  Once you have these “baseline” images, you can use your Virtualization software’s snapshot capability to freeze the image.  Clone the snapshot and you have a brand new fully patched machine in mere moments.  You may have to sysprep some of the Microsoft OS environments if you are going to create a domain environment or experiment with clustering.  That is still much faster than loading and patching from scratch. So once you have a stock of raw materials (baseline images in this case) where should you start.  Again, my grandfather’s workshop gives us the answer.  In the shop it was workbenches and tables to hold large workpieces that made the equipment more useful.  In a Windows environment the same role falls to the fundamental network services:  DHCP, DNS, Active Directory, Routing, File Services, and Storage services.  Plan your internal network setup.  Build out an AD controller with all the features listed.  Make the actual domain an isolated domain so it will not care about where you take it.  Add the Microsoft iSCSI target.  Once you have this single system, you can leverage it for almost any network environment beyond a simple stand-alone system. Having these templates and fundamental infrastructure elements ready to run means I can build a quick lab in minutes instead of hours.  My solutions are well-tested, my processes fully documented with screenshots, and my plans validated well before I have to make any changes to client systems.  the work I put in is easily returned in increased value and client satisfaction.

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  • Recommended: git-completion.bash

    - by andy.grover
    If you use git on a daily basis like I do, git-completion.bash is a great way to make your life a little easier. While I guess it does add tab-completion for git commands, the most useful feature for me is the ability to put the current branch into the cmdline prompt. Now that I am comfortable working with multiple git branches and remotes, a little reminder where I am prevents time-consuming mistakes. git-completion.bash lives in git's git tree.git clone git://git.kernel.org/pub/scm/git/git.gitcopy git/contrib/completion/git-completion.bash to ~/.git-completion.shFollow the instructions in the file to set up, and enable showing branch in $PS1I also use this alias in my ~/.gitconfig, which is convenient:[alias]        log1 = log --pretty=oneline --abbrev-commitHave fun!

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  • JDK bug migration: bugs.sun.com now backed by JIRA

    - by darcy
    The JDK bug migration from a Sun legacy system to JIRA has reached another planned milestone: the data displayed on bugs.sun.com is now backed by JIRA rather than by the legacy system. Besides maintaining the URLs to old bugs, bugs filed since the migration to JIRA are now visible too. The basic information presented about a bug is the same as before, but reformatted and using JIRA terminology: Instead of a "category", a bug now has a "component / subcomponent" classification. As outlined previously, part of the migration effort was reclassifying bugs according to a new classification scheme; I'll write more about the new scheme in a subsequent blog post. Instead of a list of JDK versions a bug is "reported against," there is a list of "affected versions." The names of the JDK versions have largely been regularized; code names like "tiger" and "mantis" have been replaced by the release numbers like "5.0" and "1.4.2". Instead of "release fixed," there are now "Fixed Versions." The legacy system had many fields that could hold a sequence of text entries, including "Description," "Workaround", and "Evaluation." JIRA instead only has two analogous fields labeled as "Description" and a unified stream of "Comments." Nearly coincident with switching to JIRA, we also enabled an agent which automatically updates a JIRA issue in response to pushes into JDK-related Hg repositories. These comments include the changeset URL, the user making the push, and a time stamp. These comments are first added when a fix is pushed to a team integration repository and then added again when the fix is pushed into the master repository for a release. We're still in early days of production usage of JIRA for JDK bug tracking, but the transition to production went smoothly and over 1,000 new issues have already been filed. Many other facets of the migration are still in the works, including hosting new incidents filed at bugs.sun.com in a tailored incidents project in JIRA.

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  • Considering Embedding a Database? Choose MySQL!

    - by Bertrand Matthelié
    The M of the LAMP stack and the #1 database for Web-based applications, MySQL is also an extremely popular choice as embedded database. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Access our Resource Kit to discover the top reasons why:   3,000 ISVs and OEMs rely on MySQL as their embedded database 8 of the top 10 software vendors and hundreds of startups selected MySQL to power their cloud, on-premise and appliance-based offerings Leading mobile and SaaS providers ensure continuous service availability and scalability with lower cost and risk using MySQL Cluster. Learn how you can reduce costs and accelerate time to market while increasing performance and reliability. Access white papers, webinars, case studies and other resources in our Resource Kit.  

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  • Mobile and Social for Retail

    - by David Dorf
    I've got two speaking gigs in the next few weeks, so I thought I'd preview both here. First I'll be at eTail West on February 24th to talk about mobile. I'll be previewing a new study of how shoppers are using mobile phones. Here's a sneak peek at one of the slides: It should be no surprise that as more consumers adopt smartphones, more are finding ways to use them to help with shopping. Sometimes that's to find a store, download a coupon, or do price comparisons. I'll also be discussing the NRF Mobile Blueprint, and will walk through an example of mobile impacting the in-store experience. Retailers need to look upon mobile as the method of bringing the digital assets of e-commerce into the aisles to enhance shopping. On March 9th I'll be at NRF Innovate co-presenting with Jon Kubo of Wet Seal on social strategies. Jon is a retail innovation rock-star and I always learn something new from every conversation with him. Below is a another slide preview: I cheated a little on the top 10 most popular retailer pages by not including Victoria's Secret Pink. VC is already represented, so I didn't include them a second time. The most interesting statistic I found was that the average user spends 55 minutes on Facebook a day. Wow! I also decided to use the old "Like" and "Fan" icons just because I like them better (pun intended). Wet Seal has been collecting interesting statistics on liked products, so I hope Jon will share lots (I'm on a roll). Hope to see you at both events.

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  • Mobile Shopping Alerts

    - by David Dorf
    Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} It’s been popular to offer coupons when people check-in to a store, because you’re catching them at the best possible time – they’re presumably in a shopping state-of-mind, and they’re at your store.  But wouldn’t it be even better to catch the people walking by your store and entice them to visit?  That’s the concept of geo-fences.  When people enter a geographic zone, they are sent a relevant text message alerting them about something nearby. I wrote about Placecast doing this for The North Face, noting that the messages were a unique combination of both offers and useful information about outdoor activities. After creating a program with European carrier O2, Placecast recently entered into an agreement to provide similar services to AT&T customers.  The ShopAlerts program allows AT&T customers in Chicago, Los Angeles, New York City, and San Francisco opt-in to receive these messages.  The program will be expanded nationwide as early as this summer. It’s a much better model for customers (and Placecast) to sign-up once with the carrier instead of each individual retailer, but I hope the messages aren’t restricted to advertising.  I really the like the idea of providing other information, such as nearby special events, races, and perhaps even things to avoid like construction.

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  • Issue with setting up multiple IP addresses on ubuntu server installation

    - by varunyellina
    I want to setup two ip addresses on my system for access through lan. This is my config on my other system. Desktop Installation My desktop installation runs with multiple IP's added through networkmanager both through lan and wifi. Server Installation On my server install I've edited /etc/network/interfaces to the following. auto eth0 auto eth0:1 # IP-1 iface eth0 inet static address 172.16.35.35 network 172.16.34.1 netmask 255.255.254.0 broadcast 172.166.35.255 dns-nameservers 172.16.100.221 8.8.8.8 # IP-2 iface eth0:1 inet static address 172.16.34.34 network 172.16.34.1 netmask 255.255.254.0 gateway 172.16.34.1 broadcast 172.16.35.255 After restarting through "/etc/init.d/networking restart" I recieve "Failed to bring up eth0:1" What am I doing wrong? Thankyou.

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  • Ambiguous Comparison Hint

    - by Ondrej Brejla
    Hi everybody! Today we would like to show you some new hint which will be available in NetBeans 7.3. It's called Ambiguous Comparison hint. Its name seems to be quite fuzzy, but it describes exactly what the hint does. It tries to check all comparisons whether they are intended. Because sometimes you want to make a simple assignment, but you make a typo and comparison appears. It's really dangerous mistake because then your code doesn't work as expected. Your application can produce buggy results. So here is how it looks like: But sometimes a comparison is really intended. E.g. in return statements when you want to return a boolean, so then the hint works as expected and no warning appears. That's all for today and as usual, please test it and if you find something strange, don't hesitate to file a new issue (component php, subcomponent Editor). Thanks.

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  • CRT as 2nd monitor goes screwy after start up?

    - by rhys
    new install of 12.04 on an old dell with a radeon ATI RV516 video card with monitor out and s-video out. During boot up all is good. Both screens operate and look fine. Then just before the desktop appears the cCRT goes purple and is covered in heavy horizontal lines, but as i said during boot up it was fine and the resolution was fine. The main monitor, an lcd, operates normally. everything else works fine, it's just the picture on the CRT that is screwed up. I used the same monitor and CRT running 11.10 which worked fine any help would be appreciated and yes i am a newbie to ubuntu here is a vid showing the completely normal screens at reboot then the purple badness when the desktop loads ?? and don't laugh at the slow machine, it's old. http://www.youtube.com/my_videos_edit?ns=1&video_id=zfuh6lBMLnc

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  • Introducing the Documentation Workflows

    - by Owen Allen
    The how-to documents  provide end to end examples of specific features, such as creating a new zone or discovering a new system. We are enhancing the individual how-tos with documents called Workflows. These workflows are each built around procedural flowcharts that show these larger and more complex tasks. The workflow indicates which how-tos or other workflows you should follow to complete a more complex process, and give you a flow for planning the execution of a process. Over the coming days I'll highlight each of these workflows, and talk about the tasks that each one guides you through.

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  • Les Techn'Oracle Et Les Sales'Oracle Sont Là !

    - by swalker
    Les Techn'Oracle et les Sales'Oracle sont lancées en région. Comme chaque année, plusieurs centaines de collaborateurs de nos Partenaires vont se former sur nos offres et nos produits les plus récents ! Les Techn'Oracle visent à présenter le contenu technique de nos produits, et leurs avantages pour les Clients, en terme d'architecture, de TCO, de flexibilité pour les Systèmes d'Information. Les Sales'Oracle ont pour objet de montrer la valeur de nos offres en termes Clients, le "à quoi ça sert" pour permettre aux Partenaires d'augmenter leur présence et leurs revenus chez nos Clients >> Rendez-vous sur le Calendrier pour les dates et les thèmes ici

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  • Pillar Axiom 600 Playbook für Partner

    - by swalker
    Erfahren Sie mehr über die Produktpositionierung und Funktionalität von Pillar Axiom 600. Das Pillar Axiom 600 Playbook (Vertriebsskript) unterstützt Sie beim Vertrieb, bei der Identifizierung und Qualifizierung von Vertriebs-Chancen, bei der Entwicklung von Vertriebsszenarien und bei der Abgrenzung zu Ihrem Wettbewerb. Setzen Sie Schwerpunkte bei der Verwendung Ihrer Ressourcen und erweitern Sie Ihr Angebot mit den OPN Specialized-Optionen, die Ihrem Unternehmen zur Verfügung stehen.

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  • What's new with Java technology? Java Embedded

    - by hinkmond
    As this article points out, Java Embedded is a safer, more robust and easier to develop platform for small networked devices. So, get ready for good things to come from Java Embedded... See: Java Embedded: Next New Thing Here's a quote: Through the past few years the industry as we know it has seen a big boom with the mobile and cloud revolution. Today, there has been an enormous amount of buzz around machine to machine (M2M) or the "Internet of Things," since we are moving into a state where everything is going to have to be interconnected and will have to properly communicate together... Today, Java Embedded provides that platform. I like it! As long as there's no Zombie Apocalypse, I think Java Embedded has a great future! Hinkmond

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  • To encryption=on or encryption=off a simple ZFS Crypto demo

    - by darrenm
    I've just been asked twice this week how I would demonstrate ZFS encryption really is encrypting the data on disk.  It needs to be really simple and the target isn't forensics or cryptanalysis just a quick demo to show the before and after. I usually do this small demo using a pool based on files so I can run strings(1) on the "disks" that make up the pool. The demo will work with real disks too but it will take a lot longer (how much longer depends on the size of your disks).  The file hamlet.txt is this one from gutenberg.org # mkfile 64m /tmp/pool1_file # zpool create clear_pool /tmp/pool1_file # cp hamlet.txt /clear_pool # grep -i hamlet /clear_pool/hamlet.txt | wc -l Note the number of times hamlet appears # zpool export clear_pool # strings /tmp/pool1_file | grep -i hamlet | wc -l Note the number of times hamlet appears on disk - it is 2 more because the file is called hamlet.txt and file names are in the clear as well and we keep at least two copies of metadata. Now lets encrypt the file systems in the pool. Note you MUST use a new pool file don't reuse the one from above. # mkfile 64m /tmp/pool2_file # zpool create -O encryption=on enc_pool /tmp/pool2_file Enter passphrase for 'enc_pool': Enter again: # cp hamlet.txt /enc_pool # grep -i hamlet /enc_pool/hamlet.txt | wc -l Note the number of times hamlet appears is the same as before # zpool export enc_pool # strings /tmp/pool2_file | grep -i hamlet | wc -l Note the word hamlet doesn't appear at all! As a said above this isn't indended as "proof" that ZFS does encryption properly just as a quick to do demo.

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  • Meet up with the JCP at JavaOne Latin America

    - by Heather VanCura
    The JCP made it to JavaOne Brazil!  We had a quickie presentation earlier today on JCP.Next that was well attended.  Come to see us at@ the  OTN mini-theatre tomorrow from 12:00-12:15 pm for a quickie on participation.  Then make your way to the Mazanino Sala 12 at 12:30 pm for CON-22250.  "The Java Community Process: How You Can Make a Positive Difference" will be presented with Heather VanCura, JCP,  and Fabio Velloso, SouJava, on Thursday, 6 December, at 12:30 pm.  Find out more about how to participate in the JCP program, the JCP.Next effort and how to get involved with Adopt-a-JSR through your JUG (or on your own)!  Here is the description in Portuguese: A JCP desempenha um papel fundamental na evolução do Java. A sessão vai enfatizar o valor da transparência e participação através da JCP, Grupos de Usuários Java e do programa Adote um JSR. Vamos explorar também algumas das mudanças futuras no processo através da iniciativa JCP.Next, e explicar como você pode se envolver. Traga suas dúvidas, suas sugestões, e suas preocupações. Nós queremos ouvir de você, e incentivá-lo e facilitar a sua participação ativa no avanço da plataforma Java

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  • RPi and Java Embedded GPIO: Java code to blink more LEDs

    - by hinkmond
    Now, it's time to blink the other GPIO ports with the other LEDs connected to them. This is easy using Java Embedded, since the Java programming language is powerful and flexible. Embedded developers are not used to this, since the C programming language is more popular but less easy to develop in. We just need to use a dynamic Java String array to map to the pinouts of the GPIO port names from the previous diagram posted. This way we can address each "channel" with an index into that String array. static String[] GpioChannels = { "0", "1", "4", "17", "21", "22", "10", "9" }; With this new dynamic array, we can streamline the main() of this Java program to activate all the ports. /** * @param args the command line arguments */ public static void main(String[] args) { FileWriter[] commandChannels; try { /*** Init GPIO port for output ***/ // Open file handles to GPIO port unexport and export controls FileWriter unexportFile = new FileWriter("/sys/class/gpio/unexport"); FileWriter exportFile = new FileWriter("/sys/class/gpio/export"); for (String gpioChannel : GpioChannels) { System.out.println(gpioChannel); // Reset the port unexportFile.write(gpioChannel); unexportFile.flush(); // Set the port for use exportFile.write(gpioChannel); exportFile.flush(); // Open file handle to port input/output control FileWriter directionFile = new FileWriter("/sys/class/gpio/gpio" + gpioChannel + "/direction"); // Set port for output directionFile.write(GPIO_OUT); directionFile.flush(); } And, then simply add array code to where we blink the LED to make it blink all the LEDS on and off at once. /*** Send commands to GPIO port ***/ commandChannels = new FileWriter[GpioChannels.length]; for (int channum=0; channum It's easier than falling off a log... or at least easier than C programming. Hinkmond

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