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  • using Inheritence with GUI (graphical user interfaces) in Java

    - by maya
    hi everyone, I work on inheritence with GUI (graphical user interfaces) let me explain for example I made super class which is vehicle and the subclass is car, so the code to make inheritence will be public class Car extends Vehicle then I want to build the class Car as JFrame like public class Car JFrame implements ActionListener { so the problem is that I couldn't put both codes in the same class, and I need to do that. anyone help me. thanks in advance I wish that the question would be clear

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  • MySQL won't use index for query?

    - by Jack Sleight
    I have this table: CREATE TABLE `point` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `siteid` INT(11) NOT NULL, `lft` INT(11) DEFAULT NULL, `rgt` INT(11) DEFAULT NULL, `level` SMALLINT(6) DEFAULT NULL, PRIMARY KEY (`id`), KEY `point_siteid_site_id` (`siteid`), CONSTRAINT `point_siteid_site_id` FOREIGN KEY (`siteid`) REFERENCES `site` (`id`) ON DELETE CASCADE ) ENGINE=INNODB AUTO_INCREMENT=35 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci And this query: SELECT * FROM `point` WHERE siteid = 1; Which results in this EXPLAIN information: +----+-------------+-------+------+----------------------+------+---------+------+------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+------+----------------------+------+---------+------+------+-------------+ | 1 | SIMPLE | point | ALL | point_siteid_site_id | NULL | NULL | NULL | 6 | Using where | +----+-------------+-------+------+----------------------+------+---------+------+------+-------------+ Question is, why isn't the query using the point_siteid_site_id index?

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  • What is SIP trunking?

    - by hypnocode
    Can someone explain to me in plain English what SIP trunking is, please? I've read about it on Google, but I don't really grasp it yet. Does it allow a VoIP call to be placed outside of the LAN? So if you had Asterisk setup as the PBX, then IP calls could be made outside of the network? Am I close or am I just saying stupid words?

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  • Languages for implementing decision trees

    - by Shailesh Tainwala
    What would be a good choice of programming language in which to implement a decision tree? The results of the implementation will be for personal use only, so no need to consider ability to publish etc. I have heard that Octave is a good option, can anyone explain why a matrix based language is recommended for implementing decision trees?

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  • Episode by episode DVD Rip to AVI on Windows 7.

    - by ProfKaos
    I'm looking for a Windows tool to rip DVD files to AVI files. VidCode looks cool, but it wants to convert the whole DVD (all files in the VIDEO_TS folder) to one AVI. I would like to pull each episode on the DVD to its own AVI. Is their a way to that with VidCode, or another ripper? My Plan B for VidCode is to manually separate files for each episode into their own VIDEO_TS folders. Is this possible? Is there an easy, lazy way to automate this?

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  • Does Java have a .new operator?

    - by chickeninabiscuit
    I came across this code today whilst reading Accelerated GWT (Gupta) - page 151. public static void getListOfBooks(String category, BookStore bookStore) { serviceInstance.getBooks(category, bookStore.new BookListUpdaterCallback()); } public static void storeOrder(List books, String userName, BookStore bookStore) { serviceInstance.storeOrder(books, userName, bookStore.new StoreOrderCallback()); } What are those new operators doing there? I've never seen such syntax, can anyone explain?

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  • Hyper-v vs Virtualbox

    - by user53864
    I am using Oracle VirtualBox for ubuntu guest virtual servers on windows server 2008 R2. I'm in a plan to migrate(stop using virtualbox) from VirtualBox to Hyper-V. I guess many are using hyper-v virtualization and have good control over it and could help me here in clarifying few things. The reason I use Virtualbox is it's open source and the reason for migrating is that if hyper-v support any additional feature which virtualbox doesn't(and I couldn't migrate VBox vms along with all the snapshots). I have following questions to get it clarified. Does hyper-v require any licence or is limited to running particular number of virtual machines?. Is hyper-v capable to export/import VMs along with all the snapshots? Is it possible to run HeadLess VMs like it's done with VirtualBox? Does hyper-v recognize VDI/VMDK? Anybody can suggest me anything?. Thanks!

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  • Windows Server 2008 R2 Upgrade via Remote Desktop

    - by Marko
    Is it possible to do an in-place upgrade of Windows Server 2008 R2 to Windows Server 2012 using only Remote Desktop? My plan is to extract WS 2012 installation iso file to C:\WS2012 and run the setup. After restart Remote Desktop connection will be lost, but will it be restored later? Is setup going to automatically install everything, restart, run WS 2012 and start listening for RDP connections? Server is rented and I would like to save the KVM fee. I read here that it's possible to upgrade WS 2008 to WS 2008 R2 like that. Thanks!

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  • Windows 8 Metro UI with Multiple Monitors -- Keep in always maximized?

    - by Jersey Dude
    Before installing Win 8 today, my plan was to keep the Metro UI up on my smaller, laptop monitor and have the classic UI running on my two larger monitors. However, in reality, as soon as I click on something in one of the classic UI monitors, the Metro UI minimizes (thus exposing the classic UI in its place). Is there any way to keep the Metro UI from minimizing when I do something in another monitor? Oddly enough, if there is an app running/suspended in the Metro Window, then the Metro UI is not minimized. If the Start screen is currently viewed, clicking in a classic window/monitor switches the Metro UI from the start screen to the last run app. Very peculiar .. Thanks

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  • zip -j command, what does the -j option mean?

    - by Simon Guo
    Wondering what is the -j option mean in the zip command. I found the explanation as following: -j Store just the name of a saved file (junk the path), and do not store directory names. By default, zip will store the full path (relative to the current path). But not quite sure what it is exact mean? Can anyone explain it using the following command as an example? C:\programs\zip -j myzipfile file1 file2 file3 Thank you.

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  • android Traceviewer

    - by siri
    Hi I am Trying to use trace viewer by Debug.startMethodTracing("sampletrace"); Debug.stopMethodTracing(); And I pull the sampletrace to a folder from sdcard. When I try view the tracefile using the following command. D:\Android\android-sdk-windows\toolstraceview D:\trace\sampletrace.trace it is showing the following line Key section does not have an *end marker Can anybody please explain what is this?

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  • PostgreSQL: Why does this simple query not use the index?

    - by David
    I have a table t with a column c, which is an int and has a btree index on it. Why does the following query not utilize this index? explain select c from t group by c; The result I get is: HashAggregate (cost=1005817.55..1005817.71 rows=16 width=4) -> Seq Scan on t (cost=0.00..946059.84 rows=23903084 width=4) My understanding of indexes is limited, but I thought such queries were the purpose of indexes.

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  • VirtualBox VM settings between different CPUs (Processor/Acceleration)

    - by Level1Coder
    I have 2 PCs, 1 with a INTEL-Q9550 (YES-VT-x) and another with INTEL-E2160 (NO-VT-x) I will be using the Q9550 first to create a new VM, install XP and install stuff I'll need. Once this VM is golden, I plan on migrating this VM over to the E2160 machine. The question is, while creating/preparing this VM on the Q9550, should I disable all the following settings below to make sure the E2160 can start this VM without errors? Q9550 Default VM Settings ========================= PROCESSOR [X] Enable PAE/NX ACCELERATION [X] Enable VT-x/AMD-V [X] Enable Nested Paging

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  • Can I run Linux on the HP Mini from Verizon Wireless, with a built-in 3G modem, and connect using the built in modem?

    - by Parker
    I apologize if my question made little sense, I am very tired at the moment. Anyway, Recently I purchases the HP Mini from Verizon Wireless. It runs on the Intel Atom processor and came with Windows 7 Starter Edition, which is quite possibly the worst and most restrictive OS I have ever used. I plan on installing CRUX, after doing a little research on minimal, free, Linux operating systems, as I am working on web programming using Python, among other things. My only worry is that, because my HP Mini uses a built in wireless card (and I have no wifi connection, only a 3G connection) that has a "mobile access" connection to Verizon wireless, I am not sure if after installing CRUX that I would still be able to connect using this option. I have never used Linux before, and am hoping this will work. So if anybody has experience with this...please answer, can I connect to vzw 3G with linux, using an internal mobile access card...

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  • Why is git better than Subversion?

    - by Ben Mills
    I've been using Subversion for a few years and after using SourceSafe, I just love Subversion. Combined with TortoiseSVN, I can't really imagine how it could be any better. Yet there's a growing number of developers claiming that Subversion has problems and that we should be moving to the new breed of distributed version control systems, such as Git. Can anyone explain how Git improves upon Subversion?

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  • Backup of images

    - by Sam Kong
    I've just installed a Ubuntu for a file server. It will share a folder (samba) and employees of my company will save photos on that. Currently the total amount of the photos is about 100GB and every day 20MB will be added. My question is about backup plan. I want to backup the photos to a remote server using a cron job. I can think of 2 things. rsync git Image files won't be changed so rsync will do. But as people say, I must git all my data. What would you do? Thanks. Sam

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  • What is wrong with this trigger in mysql?

    - by Jimit
    Hi all, Below is trigger that I need to create but It is not getting created.Please any buddy can explain me what is wrong with this trigger ? Help me please. DELIMITER $$ CREATE TRIGGER property_history_update AFTER UPDATE ON `properties` FOR EACH ROW BEGIN IF OLD.ListPrice != NEW.ListPrice THEN INSERT INTO `property_history` SET ListingKey=OLD.ListingKey,ListPrice = NEW.ListPrice, ListingStatus = OLD.ListingStatus,LastUpdatedTime = NEW.LocalLastModifiedOn; END IF; END$$ DELIMITER ;

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