Having trouble understanding Abstract class. Help!!!!!!

Having trouble understanding Abstract class. when is Abstract class used and for what.

Having trouble understanding Abstract class. when is
Abstract class used and for what.An abstract class is used to force the developer to provide a subclass, to implement the abstract methods, while still keeping the methods that were provided.
� {�                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Similar Messages

  • HT4623 I upgraded my iphone4S yesterday and Siri response with "having trouble understanding".  Is there an upgrade for Siri?

    I upgraded my iPhone4S to iOs6 and now Siri does not understand me.  Siri responses "having trouble understanding you, try again".  Is there an updgrade for Siri?  I have been searching all afternoon for a glimmer of a solution.  Any suggestions?

    Sure...
    See this Apple article for a Hard reset of a Factory reset.
    http://support.apple.com/kb/HT3728

  • Having trouble with First Class mail

    I'm trying to use my email at school (Benito Juarez Community Academy) and also set up Gradespeed but having trouble with both.
    In composing mail, the screen will only accept a line or so and no more. I can mail that but message is incomplete. Also, can't get into Gradespeed. All I get is a multicolored pinwheel that is a security check but never stops spinning.

    See this thread: [[/en-US/questions/894442]] OWA 2010/Firefox 8 and ASHX Attachments

  • Coldfusion having trouble while loading classes in Jar file

    Hi everybody.
    I have some weird problem with Coldfusion.
    I try to use a Jar file, that i put in the Coldfusion classpath. It works well (i can call some classes in the Jar file using the createObject() function ), but not every classes.
    For example,
    <cfset ServiceObject = createObject("java", "com.google.api.ads.dfp.v201204.NetworkServiceInterface")>
    <cfdump var="#ServiceObject#">
    this call works well, and i can the see the dump file.
    <cfset dfpServiceObject2 = createObject("java", "com.google.api.ads.dfp.v201204.NetworkServiceSoapBindingStub")>
    <cfdump var="#ServiceObject2#">
    This call fails, and i got a 500 error :
    ROOT CAUSE:
    java.lang.NoClassDefFoundError: Could not initialize class com.google.api.ads.dfp.v201204.NetworkServiceSoapBindingStub
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java: 39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorIm pl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.Class.newInstance0(Class.java:355)
    at java.lang.Class.newInstance(Class.java:308)
    at coldfusion.runtime.java.JavaProxy.createObjectWithDefaultConstructor(JavaProxy.java:191)
    If i check in the Jar file, i can see the NetworkServiceSoapBindingStub class. Moreover, when i do the same thing directly in a java application, it works well. Nevertheless, Coldfusion is not able to load this class. How can this be possible? Do you have any idea to help me?

    I have not been able to resolve this to date. Does anyone have half a clue as to what I might be doing wrong?
    <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Alison Stohrer ([email protected]):
    Were you able to resolve this? I am having the same problem.<HR></BLOCKQUOTE>
    null

  • Im having trouble with deleting photos, help :(

    Hi, well im quite new to this but im having major problems with deleting pictures. Im able to delete the ones i have took from my ipod but cant delete the ones i have synced from the laptop to my ipod. Also i can view them on the ipod and not on the laptop. If anywan can help it would be more than appreciated. Thanks :-(

    Thanks that really helped, well iv got another problem now. When i go on photos im able to see my pictures i put in my ipod through the laptop 'ipod cache photos' which im happy about but iv got another folder called 'photo library' with the exact pictures as 'ipod cache photos'. Now i wanted to know what folder is meant to be there and also how to delete the one thats not meant to be there. Thanks

  • Having trouble with quicktime. Help please.

    A while ago, maybe a few months actually. My quicktime stopped working so i uninstalled it and installed it again. Now whenever I go to a website where I need quicktime to see videos, I only hear the audio (e.g Apple websites, guided tour videos, audio only). What can I do to fix this problem.

    These forums can somtimes be helpful, but after a lot of reading in this case, I'm stumped.
    No help starting, then quitting GarageBand, no help setting MIDI audio output to 44100 Hz (it was already there), no help reinstalling QT 7.0.4, no help rolling back to QT 7.0.1, no help shutting down all other applications when running QT. OS is current, with no more available updates. The video I edited on this same computer using Quicktime and posted on putfile plays fine on my (gasp) older PC running Windows QT 7.0.4.
    As a loyal Macintosh owner since 1984 (my family currently has 7 working Macs, 3 iPods and 1 PC), I have the sinking feeling Apple seems to be becoming less unique and more microsoft like over time. While MS isn't up to the level of Apple yet, the gap seems to be closing. I don't want to know how to change my audio settings, repair permissions or do anything not directly related to the task at hand. I'm getting tired of paying for "upgrades" that aren't, including the new iLife suite and the QT 7 pro key I recently bought.
    How do we report this issue? I encourage everyone who is having problems with Quicktime videos stuttering, dropping video or audio to report this so that Apple will be made aware and held responsible.
    PowerBook G4 1.33 GHz   Mac OS X (10.4.5)   1.25 GB Ram

  • I'm having trouble understanding how to upload a web gallery?

    I've been trying to upload a web gallery for weeks, I just can't seem to get it right.
    Does anyone have any tips or advice? I use godaddy as my host.
    Thanks!!

    What have you tried so far and where are you struggling?
    Have you followed the various online tutorials?
    http://tv.adobe.com/watch/learn-lightroom-4/posting-a-web-photo-gallery-to-your-website/
    http://help.adobe.com/en_US/lightroom/using/WSA20E5E2B-1F61-4c59-A3F4-13C1AEF9EF56.html#WS 41FEE1CD-1062-4214-88A0-198706E0BC2B

  • Why am I having trouble making any download helper work?

    I have a new MacBook Air. I have tried downloading several Download Helpers to download videos from YouTube, but none seem to work. When I downloaded the product "Dowload Helper" I did see an icon on the tool bar. When I would open Firefox I would see it in color momentarily, then it would "ghost". It would never activate or spin on any videos.

    stuart7491,
    Firefox is released on a posted 6 week schedule, so their is no reason for any add-on developer to be caught by surprise when their add-on stops working or needs to be updated.
    https://wiki.mozilla.org/RapidRelease/Calendar#Future_branch_dates
    Central (Nightly), Aurora (aka Developer Edition), Beta, and Release
    All "channel" versions are available for anyone that wants to "test" them, to see what is "coming down the road", or to contribute to the development of Firefox.
    The "life cycle" of each new version of Firefox is 24 weeks.
    6 weeks in the Nightly channel in Alpha 1 development.
    6 weeks in the Developer Edition / Aurora channel - Alpha 2.
    6 weeks in the Beta channel - "fit and finish" stage. ''(And very rarely a new, smaller feature is added in Beta when it was developed off the normal "channel route" in secret. Has happened just once, iirc, somewhat recently.)''
    Then 6 weeks as the latest Release version, before the next Release version comes out.

  • Having trouble understanding scancodes (and their udev mapping)

    First off, I know that scancodes are basically the raw byte interpretation of keyboard presses which I can display for example with showkey --scancodes.
    However why does showkey display at least two bytes for each key that I press (is it for press/release?) and for some keys even 4 and more? And how can I dump that down to a single byte which I can specify in a hwdb database for udev?
    For example, this is the output for Fn+Brightness Up/Down:
    showkey --scancodes
    kb mode was UNICODE
    [ if you are trying this under X, it might not work
    since the X server is also reading /dev/console ]
    press any key (program terminates 10s after last keypress)...
    0x9c
    0x1c 0x9c # pressed Enter
    0xe0 0x54 0xe0 0xd4 # pressed Fn+Brightness Up
    0xe0 0x4c 0xe0 0xcc # pressed Fn+Brightness Down
    The according mappings for brightness up/down in the udev database for my keyboard model are:
    KEYBOARD_KEY_88=!brightnessup # Fn+Up
    KEYBOARD_KEY_89=!brightnessdown # Fn+Down
    So assuming 0x54/0xd4 and 0x4c/0xcc are my "relevant" bytes, how do they lead to the scancodes 0x88 and 0x89 in the hwdb?

    Yes thats what I assumed, however what I dont understand is which one do I need in case I want to overwrite or add a new key in a (custom) udev hwdb file.
    The wiki doesn't mention anything specific about the difference between key press and key release and in the example I provided I was wondering how these scancodes for press/release of a key combination from showkey -s (like 0xe0 0x54 0xe0 0xd4) led to the specified value (0x88) in the udev hwdb file, since the wiki suggest that one should use showkey -s[ to figure out the scancode of a key.
    Last edited by Triver (2014-11-23 16:13:07)

  • I'm having trouble understanding how the Address Book "works".

    I like to have one card for each organization not each  Person, if that is possible.
    For example,   Thunderbirds Organization:   Jeff Tracy,  Lady Penelope, Mr hackenbaker.  On the same card.
    Is it possible to have all 3 names on the same card? I am successfully able to enter all this into the Address Book. However, when using the addresses to prepare e-mails I often find that the names get mixed up. ( Apple Mail usually puts the name of the 1st person in the group in front of the e-mail address that I select, rather than the actual name of the person that goes with that e-mail address.)
    Having multiple people from the same organization on the same card seems to make sense for me. Some have advised me that I need to create a separate card for each and every person! Is that true?
    Suggestions appreciated.
    HackenbackerHackenbackerssss

    Ziatron wrote:
    I like to have one card for each organization not each  Person, if that is possible.
    For example,   Thunderbirds Organization:   Jeff Tracy,  Lady Penelope, Mr hackenbaker.  On the same card.
    Is it possible to have all 3 names on the same card? I am successfully able to enter all this into the Address Book. However, when using the addresses to prepare e-mails I often find that the names get mixed up. ( Apple Mail usually puts the name of the 1st person in the group in front of the e-mail address that I select, rather than the actual name of the person that goes with that e-mail address.)
    Having multiple people from the same organization on the same card seems to make sense for me. Some have advised me that I need to create a separate card for each and every person! Is that true?
    Suggestions appreciated.
    HackenbackerHackenbackerssss
    In order for mail to work correctly you will need a seperate card for each individual.

  • TS1424 Hey everyone I'm having trouble with iTunes please help ASAP thank you.

    Hey I just bought an iPad and I can't connect to iTunes, seeing as I'm using my iPad right now I know the wifi works, I've tried a lot of different things and read the apple site for help but nothing worked, please help me thank you.

    http://support.apple.com/kb/HT1923?viewlocale=en_US
    this worked perfectly for me, with no loss of library! BUT was warned about uninstalling things in the order listed...FYI.

  • Having trouble communicating between classes

    Ok can someone just code out this simple example so I can figure it out for my project?
    you have class A, B, and C
    class A defines a JButton........JButton b = new JButton();
    class B has some code(anything) that is excecuted when the button is pressed
    class C also has some different code that is excecuted when the button is pressed
    Also class C has a variable defined File file; that is used in a method in class B
    basically how do you connect the classes so that they know what variables are what?

    Double post.
    http://forum.java.sun.com/thread.jspa?threadID=696934&tstart=0
    Please be more specific on why you didn't get any useful replies from this thread (or if you just posted it here so that more people could read it).

  • Having Trouble With My Ipod HELP ME OUT!!!!!

    There's a problem with my ipod every time i plug it into my mac it connects then disconnects right away not letting do anything. Then it says its syncing with my mac before it disconnects and then there's nothing on it, and when i try it on windows it just say it need to be formatted and i did it once but nothing happened. I restored it and still the same problem happened i need help any advice would be useful or should i just take it to the genius bar.

    Was the restore successful? That is the iPod successfuly went through all the steps without error? If so then
    that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
    Apple Retail Store - Genius Bar       

  • I'm currently having trouble understanding why my Inactive Memory (Displayed in Activity Manager) is running at such a high rate.

    I'm using Quicktime Player to export movies. I'm just bothered by the fact that is says "Inactive" rather than "Active". Can someone please explain to me why I have such low Free Memory?
    Computer Specifications:
    iMac i7 3.4Ghz
    RAM: 16GB DDR3
    1TB HDD
    AMD Radeon 6970m 1GB

    Inactive Memory is memory which has been allocated  to applications which were previously, but no longer, using it. It remains available to them on a "first call" basis. In theory, it should be readily available to other applications on demand, but in practice it doesn't seem to work this way.
    Looking at Page outs and Swap used down at the bottom -- and I won't go into any details right now -- it looks like you are low on RAM, but maybe not critically, and could use more. Either that or run fewer memory intensive applications concurrently.
    One (little known) way to regain some of that Inactive memory to Free memory, which right now on your system is quite low and will end up causing your Mac to run sluggishly or freeze it completely, is to open Disk Utility in Utilities and run repair Permissions. Another way is to simply restart. If you want to read more on memory
    http://www.thexlab.com/faqs/lackofram.html
    http://support.apple.com/kb/ht1342
    http://macs.about.com/od/usingyourmac/qt/os-x-memory-usage.htm
    http://apple.stackexchange.com/questions/104/whats-the-difference-between-real-v irtual-shared-and-private-memory

  • Having trouble downloading apps, please help

    I just recently bought an i phone 3gs, i do not have a credit card so i bought a $25 i tunes card so i could download apps.
    my total balance on i tunes now is like $35, when i go to download an app i want to buy, i click on the "buy app" button and then a box pops up that says "payment information required" soon as i type my password it brings me to edit payment information. i put none for payment method as i have $35 in store credit. soon as i click done it just brings me back to the same screen where is asks me to click on the "buy app" button. if i click it it brings me back to "payment information required"
    i can download music no problem but can't download apps can someone please tell me what i need to do?
    thanks

    Yes, as stated apps are prohibited from being downloaded...
    If you don't have a credit card to link to iTunes...use a debit card...works just the same..

Maybe you are looking for

  • Network with XP (32 bit) and Windows 8.1(64 bit)

    The HP printer F4280 is connected directly to the XP computer and via a wired modem network connection to the Windows 8.1 computer. The XP computer gets perfect prints. The Windows 8.1 computer gets incomplete prints - the shaded stuff is printed, th

  • MacPro 2008 remote reconfiguration

    Hi, I am trying to reconfigure the drives on a MacPro 2008 remotely via Screen Sharing. The remote machine had 4 drives configured in RAID 0 (I know). I copied the contents of the drives (66 GB or so) to an external USB drive via SuperDuper and boote

  • Use APEX_ITEM.SELECT_LIST_FROM_LOV on report

    Hi All, I am trying to create a editable report. In this report, I have a few columns that allow users to update information. I have a problem to have my program return the current values of APEX_ITEM.SELECT_LIST_FROM_LOV in the specific ticked rows.

  • The video that is recorder through my mobile camera can't be seen in mobile screen

    I need to record through by mobile camera and play it in browser of my website. In my mobile phone the frame that should show the video is created by flash player but it is just white and no video (preview) is seem inside the frame. The video that is

  • How do I move an item from my ipad device IOS 8 to the cloud

    How do I move an item from my ipad device IOS 8 to the cloud?