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  • Create instance of generic type in Java?

    - by David Citron
    Is it possible to create an instance of a generic type in Java? I'm thinking based on what I've seen that the answer is "no" (due to type erasure), but I'd be interested if anyone can see something I'm missing: class SomeContainer<E> { E createContents() { return what??? } } EDIT: It turns out that Super Type Tokens could be used to resolve my issue, but it requires a lot of reflection-based code, as some of the answers below have indicated. I'll leave this open for a little while to see if anyone comes up with anything dramatically different than Ian Robertson's Artima Article.

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  • multitreading scheduling related java

    - by vichi
    class A implements Runnable{ B b=new B(); public void run(){ while(true){ System.out.println("H1"+Thread.currentThread().getName()); } } } public class Test { public static void main(String[] str){ A a1 =new A(); // A a2 =new A(); // Thread t1 =new Thread(a1, "Vichi"); Thread t2 =new Thread(a1,"Vishu"); t1.start(); t2.start(); } } what will be the ans: 1) only one of them will get the chance to execute 2) both will get chance in arbitrary manner please suggest possible ans with explations

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  • Where does Eclipse save the list of files to open on startup?

    - by Grundlefleck
    Question: where does Eclipse store the list of files it opens on startup? Background: Having installed a plugin into Eclipse which promptly crashed, my Eclipse workspace is in a bit of a state. When started, the building workspace task pauses indefinitely at 20%. Before I uninstall the plugin I want to give it another chance. I have a feeling that the reason Eclipse is pausing is because of a file which was opened when it crashed, which it tries to reopen on startup. If I can stop this file from opening on startup there's a chance I may be able to coax the plugin to behave. The problem is I have no idea where that list of files is persisted between runs of Eclipse. ...a second before I posted this question, I realised I could just delete the file causing the problem (duh). However, the search has frustrated me enough to want to find the answer.

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  • How to obtain a random sub-datatable from another data table

    - by developerit
    Introduction In this article, I’ll show how to get a random subset of data from a DataTable. This is useful when you already have queries that are filtered correctly but returns all the rows. Analysis I came across this situation when I wanted to display a random tag cloud. I already had the query to get the keywords ordered by number of clicks and I wanted to created a tag cloud. Tags that are the most popular should have more chance to get picked and should be displayed larger than less popular ones. Implementation In this code snippet, there is everything you need. ' Min size, in pixel for the tag Private Const MIN_FONT_SIZE As Integer = 9 ' Max size, in pixel for the tag Private Const MAX_FONT_SIZE As Integer = 14 ' Basic function that retreives Tags from a DataBase Public Shared Function GetTags() As MediasTagsDataTable ' Simple call to the TableAdapter, to get the Tags ordered by number of clicks Dim dt As MediasTagsDataTable = taMediasTags.GetDataValide ' If the query returned no result, return an empty DataTable If dt Is Nothing OrElse dt.Rows.Count < 1 Then Return New MediasTagsDataTable End If ' Set the font-size of the group of data ' We are dividing our results into sub set, according to their number of clicks ' Example: 10 results -> [0,2] will get font size 9, [3,5] will get font size 10, [6,8] wil get 11, ... ' This is the number of elements in one group Dim groupLenth As Integer = CType(Math.Floor(dt.Rows.Count / (MAX_FONT_SIZE - MIN_FONT_SIZE)), Integer) ' Counter of elements in the same group Dim counter As Integer = 0 ' Counter of groups Dim groupCounter As Integer = 0 ' Loop througt the list For Each row As MediasTagsRow In dt ' Set the font-size in a custom column row.c_FontSize = MIN_FONT_SIZE + groupCounter ' Increment the counter counter += 1 ' If the group counter is less than the counter If groupLenth <= counter Then ' Start a new group counter = 0 groupCounter += 1 End If Next ' Return the new DataTable with font-size Return dt End Function ' Function that generate the random sub set Public Shared Function GetRandomSampleTags(ByVal KeyCount As Integer) As MediasTagsDataTable ' Get the data Dim dt As MediasTagsDataTable = GetTags() ' Create a new DataTable that will contains the random set Dim rep As MediasTagsDataTable = New MediasTagsDataTable ' Count the number of row in the new DataTable Dim count As Integer = 0 ' Random number generator Dim rand As New Random() While count < KeyCount Randomize() ' Pick a random row Dim r As Integer = rand.Next(0, dt.Rows.Count - 1) Dim tmpRow As MediasTagsRow = dt(r) ' Import it into the new DataTable rep.ImportRow(tmpRow) ' Remove it from the old one, to be sure not to pick it again dt.Rows.RemoveAt(r) ' Increment the counter count += 1 End While ' Return the new sub set Return rep End Function Pro’s This method is good because it doesn’t require much work to get it work fast. It is a good concept when you are working with small tables, let says less than 100 records. Con’s If you have more than 100 records, out of memory exception may occur since we are coping and duplicating rows. I would consider using a stored procedure instead.

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  • Demo of an Early Beta of Firefox OS Running on a ZTE Developer Phone [Video]

    - by Asian Angel
    Are you curious about Mozilla’s new mobile OS platform? Then here is your chance to see an early beta of Firefox OS in action. This video shows the OS’s built-in web browser, phone dialer, camera, and gallery image viewer running on a developer phone from ZTE. Firefox OS Demo (09-06-12) [via The H Open] How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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  • How to See What Web Sites Your Computer is Secretly Connecting To

    - by Lori Kaufman
    Has your internet connection become slower than it should be? There may be a chance that you have some malware, spyware, or adware that is using your internet connection in the background without your knowledge. Here’s how to see what’s going on under the hood. Secret Squirrel by akumath HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast! Amazon’s New Kindle Fire Tablet: the How-To Geek Review

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  • A Video Chat with OAUG President David Ferguson

    - by Aaron Lazenby
    A week ago, I had a chance to sit down with OAUG president David Ferguson. I was really looking forward to this conversation after the sharp opinion piece David submitted to Profit Online last year about what it takes to implement social CRM in a sales organization.  Here, David shares his thoughts about this year's Collaborate 10 conference, the topics users are exited about, and the work the OAUG will be doing in the next twelve months.

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  • Tuesday 6th Manchester SQL User Group - Chris Testa-O'Neil (Loading a datawarehouse using SSIS) and

    - by tonyrogerson
    Chris will give a talk on Loading a datawarehouse using SQL Server Integration Services, Tony Rogerson will give a talk on Database Design: Normalisation/Denormalisation and using Surrogate Keys - practicalities/pitfalls and benefits in Microsoft SQL Server. Registration is essential which you can do here: http://sqlserverfaq.com?eid=218 . Come and join us for an evening of SQL Server discussion, as well as the two formal sessions by Chris Testa-O'Neil and Tony Rogerson there will be a chance...(read more)

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  • Upcoming Webcast on June 17: Gain Control Over Your Financial Close

    - by Theresa Hickman
    Accenture and Oracle EPM (Enterprise Perfromance Management) and GRC (Governance, Risk, and Compliance) will be hosting a live webcast called "Gain Control Over Your Financial Close - Confidence in the Process, Trust in the Numbers." When: Thursday, June 17, 2010 Time: 9:00am PST (Noon EST) Don't miss this chance to find out how you could optimize the financial close process and transform the speed, quality and integrity of your financial reporting. For more information and to register for this event, see this webpage.

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  • Get to Know the ‘Real’ Pyro [Humorous Team Fortress 2 Video]

    - by Asian Angel
    People sometimes wonder just what is going through Pyro’s head when he is spreading mayhem and destruction. If you are one of them, then here is your chance to see things from Pyro’s ‘unique’ point-of-view! Meet the Pyro [via Dorkly] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • Microsoft SQL Server High-Availability Videos and Q&A Log

    - by KKline
    You Want Videos? We Got Videos! I always enjoy getting the chance to catch up with author, consultant, and Microsoft Clustering MVP Allan Hirt . Allan and I recently presented two sessions covering an overview of high availability in Microsoft SQL Server and, the following week, a demo of how to implement several different kinds of high availability techniques including database mirroring, transactional replication, and Windows clustering services. You can see videos of these presentations at the...(read more)

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  • Bare Metal Restore Part 2

    - by GrumpyOldDBA
    I blogged previously about how Windows 2008 R2 has native "bare metal restore"   http://sqlblogcasts.com/blogs/grumpyolddba/archive/2011/05/13/windows-2008-r2-bare-metal-restore.aspx , see the Core Team's blog post here;  http://blogs.technet.com/b/askcore/archive/2011/05/12/bare-metal-restore.aspx Well since then I’ve actually had the chance not only to put the process to the test but to see if I could go one step further. I have a six identical IBM Servers, part of...(read more)

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  • WCF RIA Services feedback

      If you use or plan to use WCF RIA Services, here is your chance to shape the future of this product, vote or propose features for vNext in this page: http://dotnet.uservoice.com/forums/57026-wcf-ria-services You can find help and ask questions on the current release of RIA Services on the official forum: http://forums.silverlight.net/forums/53.aspx ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • WCF RIA Services feedback

    - by pluginbaby
      If you use or plan to use WCF RIA Services, here is your chance to shape the future of this product, vote or propose features for vNext in this page: http://dotnet.uservoice.com/forums/57026-wcf-ria-services You can find help and ask questions on the current release of RIA Services on the official forum: http://forums.silverlight.net/forums/53.aspx

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  • Is Nick Clegg a man or a mouse?

    - by BizTalk Visionary
    Well we got the hung election so many of us wanted! I believe it really is time for electoral change. Why? Consider: the ConMen under Cameroon have polled 36% of the great British voting public – well those that got to vote!! That means 64% of us don’t want him as PM. So what gives him the right to govern? Well an ancient voting system ideal for two party politics. But for the last 30 years we’ve had multi-party politics and going forward we may see 4 or 5 parties stepping up. We have to set in place a system that makes this work! So what does that mean today: Nick has a golden chance to push forward the case and in fact the absolute right for the change. He needs to keep this in mind when he discusses coalition with both Labour and the ConMen. So the mouse approach: Decides it is only fair to side with the ‘biggest’ vote and team up with the ConMen. Chances of electoral change? Big fat zero. Chance of achieving any of his other targets. Big fat zero. Why? Simple (as the Meer Kat would say). Cameroon needs to become PM by hook or crook. Once PM he holds the whip hand. Labour will dump Brown and head off into Leadership race land, Clegg will be knocking on number 10, having meaningless meetings and seeing no reward. Finally while Labour is at 6‘s and 7’s  the ‘new’ PM will call a new election, gain the majority they need and dump luckless Nick!! So the man approach: Team up with Labour. As one of the conditions – Brown to go. Run referendum for PR. Get PR through then force Labour to have new election under PR. Nick now hero and should be in a much better place following a PR election!! The man bit is standing up to the media attack for supporting Labour. Come Nick – be a man for a better Britain!!

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  • Is Nick Clegg a man or a mouse?

    - by BizTalk Visionary
    Well we got the hung election so many of us wanted! I believe it really is time for electoral change. Why? Consider: the ConMen under Cameroon have polled 36% of the great British voting public – well those that got to vote!! That means 64% of us don’t want him as PM. So what gives him the right to govern? Well an ancient voting system ideal for two party politics. But for the last 30 years we’ve had multi-party politics and going forward we may see 4 or 5 parties stepping up. We have to set in place a system that makes this work! So what does that mean today: Nick has a golden chance to push forward the case and in fact the absolute right for the change. He needs to keep this in mind when he discusses coalition with both Labour and the ConMen. So the mouse approach: Decides it is only fair to side with the ‘biggest’ vote and team up with the ConMen. Chances of electoral change? Big fat zero. Chance of achieving any of his other targets. Big fat zero. Why? Simple (as the Meer Kat would say). Cameroon needs to become PM by hook or crook. Once PM he holds the whip hand. Labour will dump Brown and head off into Leadership race land, Glegg will be knocking on number 10, having meaningless meetings and seeing no reward. Finally while Labour is at 6‘s and 7’s  the ‘new’ PM will call a new election, gain the majority they need and dump luckless Nick!! So the man approach: Team up with Labour. As one of the conditions – Brown to go. Run referendum for PR. Get PR through then force Labour to have new election under PR. Nick now hero and should be in a much better place following a PR election!! The man bit is standing up to the media attack for supporting Labour. Come Nick – be a man for a better Britain!!

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  • A CLR-supporting browser (4 replies)

    Microsoft, by seemingly ignoring the huge benefits of JIT compiling VMs on the browser and instead pushing Silverlight (which is pretty awesome though), is showing it STILL hasn't gotten the Web. (The fact that I can't seem to post on these newsgroups using Firefox (!!!) is yet another glaring example) What is so ironic is that it has a golden chance to leapfrog Chrome without even reinventing any...

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  • App Script Office Hours - August 16, 2012

    App Script Office Hours - August 16, 2012 Eric and Jan from the Apps Script Developer Relations team host another weekly edition of office hours, a chance for developers to ask their questions live or just chat about new features. This week they also highlighted some apps in the Chrome Web Store built on Apps Script: DriveEye, Gmail Meter, Gmail Print All for Chrome, and Drive Forms. To find out when the next office hours are scheduled visit: developers.google.com From: GoogleDevelopers Views: 873 24 ratings Time: 31:31 More in Science & Technology

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  • A first look at SignalR

    - by Rick Strahl
    Last month I finally had a chance to use SignalR in a live project for the first time, and I've been impressed by what this technology offers to .NET developers. It's easy to use and provides rich real-time two way messaging between client and server applications, as well as the ability to broadcast message to all connected clients. This is technology that offers many opportunities to rethink of what we can build with Web applications.

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  • Difference in Ubuntu One sync-speed between Natty and other versions?

    - by bisi
    I was wondering if anyone had had the chance to compare performance between Ubuntu One upload speeds on Natty Narwhal and any other version of Ubuntu? Also, any difference on how well it connects? [don't shoot me for asking ;)] I am hesitant about upgrading on my regular workstation, but if it improves my user-experience with U1, I might be willing to risk it... Thanks for all informed opinions :) bisi

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  • Going For Gold: AngloGold Ashanti and Oracle Spatial 11g

    - by stephen.garth
    Last chance - Register Now for Free Webinar Date and Time: Thursday May 6 at 11:00am PDT (2:00pm EDT) Check out this 1-hour Directions Media webinar to learn how the world's 3rd largest gold miner has implemented a unique geospatial data infrastructure based on Oracle Spatial 11g to streamline their business processes for gold exploration. Terry Harbort, Exploration Systems Architect with AngloGold Ashanti, will provide insights into the company's use of Oracle Spatial 11g GeoRaster, 3D visualization techniques, Real Application Clusters, and more. The presentation is followed by a live Q&A session. Register Here

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  • A list of game mechanics

    - by Iain
    I'm trying to compile a list of game mechanics, by which I mean high-level/meta game mechanics like Cooperation, Resource Management, Chance and Time Manipulation rather than low level mechanics like running, jumping climbing ladders, etc Does any one have any suggestions or can point me to good existing lists? My WIP list is already proving to be quite useful to me in the way I think about games.

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  • Win a place at a SQL Server Masterclass with Kimberly Tripp and Paul Randal... 4 days left

    - by Testas
    Only 4 days left to win a chance to see Paul and Kimberly's  Send a email to [email protected] with Master class in the subject line for an opportunity to win a free ticket to this event   and if you do not win.....  You can also register for the seminar yourself at: www.regonline.co.uk/kimtrippsql  More information about the seminar   Where: Radisson Edwardian Heathrow Hotel, London When: Thursday 17th June 2010

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  • Apple Mac App Store?

    - by Riddler
    The Mac App store seems like an ideal distribution channel for apps made specifically for OSX. However, due to the high quantity of apps, I wasn't sure if there was an actual chance of my app making money. What would be a reasonable amount of sales from the Mac App Store for an app made by a small developer? I am wondering if the profit would be worth the effort and money required to get the app in the store.

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