Skip to main content

Interface Vs Abstract

Interface..
1. A class can implement from many interfaces
2. A class may or may not implement all methods of an interface
3. There can no fields in a interface
4. There can be no access modifiers. By default all methods are public.
5. No default implementation allowed in interface
6. Define peripherial abilities of a class which two different types of sub classes can inherit
7. Performance: codes requires more time to find the actual method in a class
8. Adding new method to base interface class would require finding all classes that implement the interface and implementing new method


Abstract
1. A class can inherit from only one abstract class
2. A class has to implement all methods of an interface
3. Fields are allowed
4. Different access modifiers are allowed.
5. You can provide default implementations
6. Defines core abilities of a class.
7. Performace: fast
8. Adding new method, we can provide a default implementation for all classes in one base abstract class.

A good example can be viewed at http://www.codeproject.com/KB/cs/abstractsvsinterfaces.aspx
Labels:

Comments

Laura Bush said…
Great job for publishing such a nice article. Your article isn’t only useful but it is additionally really informative. Thank you because you have been willing to share information with us. Custom Software Service Provider In Malaysia
17 February 2021 at 22:11
Post a Comment

Popular posts from this blog

How to detect HTML5 support for a browser?

HTML5 has introduced lots of new cool  tags . Not all the browsers support all tags and also the implementation of these tags may be different for each browser. HTML5 specification defines the functional aspects of these tags and not the implementation. Also the general concensus is that by 2022 all browsers will support all new features of HTML5. Of all the modern browsers, Chrome seems to have implemented most, if not all, featutes of HTML5. IE9 supports few. Firefox sits in between. So as a developer how do you make use of the cool HTML5 features without causing any compatibility issues with existing browsers? Traditionally developers have used User Agent to detect browser type and use the features accordingly. However these days, you can easily change a User Agent by using addons in your browser. So you need a more robust way to detect the features supported by the browser as the same engine of two different versions of a browser mig...
Post a Comment
Read more

Searching Unicode characters in Oracle table

Oracle implementation of Regular expression has no support for using hexadecimal code to search for Unicode characters. The only way to search for Unicode character is it use the character itself. Normally with Regular expression, you can use \x or \u followed by hexadecimal code to search for any character. E.g. \x20 will match space. But REGEXP_LIKE in Oracle does not support \x. You need to use unistr function to convert the code to equivalent character and then use it with REGEXP_LIKE. E.g. REGEXP_LIKE(source,'[' ||unistr('\0020')|| ']');
Post a Comment
Read more

System.Configuration in .Net Framework 2 onwards

Often application need custom configuration section. System.Configuration namespace includes classes for reading and writing configuration settings. There is a slight difference in how you use this namespace depending on the Framework version you are using Prior to .Net Framework 2.0, the .Net Framework included System.Configuration namespace, but that version of the namespace is now outdated. If you simply add the System.configuration namespace to your project (using in C#), your application references the outdated namespace. To refer to the updated namespace, follow these steps 1. In VS, open the project that requires System.Configuration namespace. 2. Click on the Project menu and then click Add Reference 3. On the .Net tab, Select System.Configuration as shown in following figure, and click OK 4. Now add the System.Configuration namespace to your project normally using Imports (in VB) or using (in C#) and your application will reference the correct version of the namespa...
Post a Comment
Read more