When we go for abstract !

Hello friends,
When we go for abstract class and when we go for interface?
i think the interface are future use in realtime but abstract we must
use immediatly?is it correct ?
thanks and regards
ramesh,

When we go for abstract class and when we go for
interface?http://onesearch.sun.com/search/onesearch/index.jsp?qt=abstract+class+vs+interface&subCat=&site=dev&dftab=&chooseCat=javaall&col=developer-forums
317 results. <_<
i think the interface are future use in realtime but
abstract we must
use immediatly?is it correct ?It has nothing to do with real-time and you are not correct.

Similar Messages

When should I use abstract classes and when should I use interfaces?

Can any body tell me in which scenario we use /we go for Interface and which scenario we go for abstract class, because as per my knowledge what ever thing we can do by using Interface that thing can also done through abstract class i mean to say that the
behavior of the two class.
And other thing i also want to know that which concept comes first into the programming abstract class or Interface.
S.K Nayak

The main differences between an abstract class and an interface:
Abstract
An abstract class can contain actual working code (default functionality), and can have either virtual or abstract method.
An abstract class must be sub-classed and only the sub-classes can be instantiated. Abstract methods must be implemented in the sub-class. Virtual methods may be overridden in the sub-class (although virtual methods typically contain code, you still may
need/want to override them). A good use for an abstract class is if you want to implement the majority of the functionality that a class will need, but individual sub-classes may need slightly different additional functioality.
Interface
An interface only contains the method signatures (method name and parameters), there is no code and it is not a class.
An interface must be implemented by a class. An interface is not a class and so it cannot be sub-classed. It can only be implemented by a class. When a class implements an interface, it must have code in it for each method in the interface's definition.
I have a blog post about interfaces:
http://geek-goddess-bonnie.blogspot.com/2010/06/program-to-interface.html
(sorry, I have no blog posts specific to abstract classes)
~~Bonnie DeWitt [C# MVP]
http://geek-goddess-bonnie.blogspot.com

I am changing from Word to Pages. I have created my custom template with all my styles etc and that is what comes up when I go for a New Document. Fine. How do I get it to use the same Custom Template when I use Pages to open a Word document?

I am changing from Word to Pages. I have created my custom template with all my styles etc and that is what comes up when I go for a New Document. Fine. How do I get it to use the same Custom Template when I use Pages to open a Word document?

The template is a document in itself, it is not applied to an existing document whether it is a Pages document or a Word document converted to a Pages document.
You would need to either copy and paste content, using existing styles, or apply the styles to the converted Word document.
You can Import the Styles from an existing document and those imported Styles can be used to override the current document's styles:
Menu > Format > Import Styles
The process is simplified if the styles use the same names, otherwise you will need to delete the style you don't want and replace it with the one that you do want when asked, then the substitution is pretty straightforward.
Peter

My i phone 4 is not letting me download apps cus of my billing information everytime i type the correct information it just keeps saying "security code invalid" when i know for a fact its correct

MY I PHONE WILL NOT LET ME DOWNLOAD ANYMORE APPS CUS OF MY BILLING INFORMATION IVE FIXED THIS ERROR SEVERAL TIMES ALREADY & IT STILL TELLS ME "SECURITY CODE INVALID" WHEN I KNOW FOR A FACT IT IS NOT. HELP ME

Contact the card issuer and find out what the problem is.
Was the card issued in the same countryas the store you're trying to use?

How do I update my software, currently on10.6.8 but when I check for new software I'm told that I'm up to date

Hi,
I want to update my software, in order to buy Numbers, which requires 10.7. However, when I check for updates I'm told I'm up to date although I see I only have 10.6.8
Help.
Thanks in advance

You are upto date for 10.6 = Snow Leopard...
The next OS X = Mountain Lion = 10.8 which is a paid Upgrade...
Upgrade to Mountain Lion

I am updating iphoto 9.1 to 9.3 and every time when I clicked for update aps store asked to open it in the account where you purchased. I am using the same account and its available in the purchased item of this account. Can someone resolve this problem.

I am updating iphoto 9.1 to 9.3 and every time when I clicked for update aps store asked to open it in the account where you purchased. I am using the same account and its available in the purchased item of this account. But in my purchased item library it indicates that you update iPhoto. I am not sure which account the aps store asking. Can someone resolve this problem.

Contact App Store support. They're the folks who can help with Account issues.
Regards
TD

When i serch for something the headings come up but when i click on the link it takes me to a different site to the linkn i clicked??

When i serch for a term on Firefoxthe page comes up with all the relevant serch items but when i click on one of them it takes me to a completely different web page to that on the serched items. So the only way i can find is to cut and paste the link.

Do a malware check with some malware scanning programs.<br />
You need to scan with all programs because each program detects different malware.<br />
Make sure that you update each program to get the latest version of their databases before doing a scan.<br />
* http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
* http://www.superantispyware.com/ - SuperAntispyware
* http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
* http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
* http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
See also:
* "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

When i search for a website it takes me to another website. I will click on the link and it takes me to one ive never wanted? please help very frustrating! I am not very computer savy, is it my settings or something? Jen

When I search for a website it itakes me to another website. I will click on a link and it takes me to something completely different or yellow pages etc. Please help I am very frustrated and not very computer savy! Thanks! Jen

Hi Jeff I have uninstalled Muse from my applications and have tried to download the new version but it displays a message 'file not found'. I have included a screenshot.

I have a problem while typing in my MacBook pro. it is showing different characters when i type. for example: qw`e§r]t[y= this is how when we type "qwerty|" can anyone help me pls?

I have a problem while typing in my MacBook pro. it is showing different characters when i type. for example: qw`e§r]t[y= this is how when we type "qwerty|" can anyone help me pls?

You could just try changing your Input Sources under System Preferences>Language & Text:
But I kind of doubt that's going to work. It may be a hardware problem or a system problem. If you take it into Apple they might be able to determine which and might advise a reinstallation of System software. I would take it to an Apple Store or an AASP but, first, make sure that you have a backup just in case they suggest a clean install of the system.
Good luck,
Clinton

I just bought iphone 5 and my itunes says I need itunes 10.7 But when I look for upgrades it says I have the current version of itunes. HELP!

I just bought iphone 5 and my itunes says I need itunes 10.7 But when I look for upgrades it says I have the current version of itunes. HELP!

I am so sorry I am frustrating you. This is the first time I have used this community and am leanring as I go. I am not able to see the entire post that you leave, unless I look at it on my phone (email)--I am so sorry. You have no idea how much i appreciate your help. Yes, I see that I can get the later version of OS software, but its not availabe for immediate download. My only options appear to be having it shipped, or going to the store to purchase. And if you know of another way that I can access all of my itunes library music on my new phone withouth using itunes, I would love to hear about it.--thanks and again i am so sorry for frustrating you.

I have just downloaded a free app and there is no icon and it will not open from the list even tho it appears to have downloaded and the "open" button is available. Does not show up when I search for it. Plenty of memory . . .

I Have an iPad mini running iOS 7.1.2, I downloaded a new app and it's icon does not appear anywhere ( have ~ 180 apps so not at limit) and it won't open from the purchased apps list. It does not show up when I search for it so can't open t that way either. It doesn't require iOS 8. Can't delete and reinstall, cause not icon. This is not a normal "app won't open" question. it doesn't start the. Stop it just doesn't seem to exist. Any help is appreciated

Hello Chelleuri,
Thank you for using Apple Support Communities.
The following article provides information to trroublehshoot issues with installed apps, including not opening.
iOS: An app you installed unexpectedly quits, stops responding, or won’t open - Apple Support
Regards,
Jeff D.

I downloded iphoto 11 9.2 and when opened it for the first time and the program started to update my iPhoto library the file got corrupted. That has happened in the two macs I have (both of them rather new and updated to last Lion version 10.7.2).

I downloaded Iphoto 11 9.2 from the apps store (was on iphoto '09 before version 8.x) and when opened it for the first time it tried to update my photo librery and ended up corupting it to the extreme that I had to get a backup from time capsule and downgrade my iphoto version. I spent yesterday 6 hours at the genius bar in an apple store and they were not able to provide me with any other solution. In the emantime, I have to forget about about photo streaming... Any idea, is this a bug that somebody knows how tp fix?

In fairness, this isn't an issue in iPhoto 11 but one in your Library. Some file or other in there is damaged and that's what causes the crash during the upgrade.
Download iPhoto Library Manager and use its rebuild function. This will create a new library based on data in the albumdata.xml file. Not everything will be brought over - no slideshows, books or calendars, for instance - but it should get all your albums and keywords back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.

When a link is a Document, Firefox doesn't show my word processor in the application choices. When I browse for Word, it won't let me check the box to always us Word.

When a link is a file (not a web site) Firefox opens a dialog box that begins "You have chosen to open...: and defaults to Save File. When I click on the Open File.. radio button, my word processing program, Word does not appear. When I Browse for the application in the Program Files folder of my computer, I can select Word but the check box to "Do this automatically for this file type from now on." is 'grayed out'. When I click OK, Word loads with the downloaded document.
This is a real pain the in tokus to do this EVERY time. I have checked the association in Windows XP and that file extension IS associated with the Word application. What gives?

Try using a different graphics type for your logo. Some don't translate well to Word. I used to know which ones were compatible but that was long ago and the list may have changed.
Jerry

TS1814 I had to restore my Ipod Touch and now I can't connect to anything on it. When it asks for my Apple ID it comes up with an error message and says that it can't connect to the server. I have checked my WiFi connection and its connected.

I have had to restore my Ipod Touch and now I can't connect to anything on it. When it asks for my Apple ID it comes up with an error message and says that it can't connect to the server. I have checked my WiFi connection and its connected.

Hi there,
I would recommend taking a look at the troubleshooting steps found in the article below.
Can't connect to the iTunes Store
http://support.apple.com/kb/ts1368
-Griff W.

HT4972 I'm trying to update my iphone 3G to ios5 - however in Itunes when I 'check for updates' it is advising me that I have the latest version (4.2.1). Hence I can't update and now I can't run a few of the apps I previously used. Help!

Following a backup and restore of my iphone 3g I have lost the use of a number of apps - this seems to be as they need ios5 or later to support them and I only have 4.2.1
When I check for updates via itunes I am advised that I have the latest version - but clearly I don't.
Any help gratefully received on how I can upgrade to ios5
Yally

Sadly, the iPhone 3G can not be upgraded beyond iOS 4.2.1.

When we go for abstract !

Similar Messages

Maybe you are looking for