Use of Interface In C# and Java

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Hi,

I studied that Interface is used for achieving the concept of multiple inheritance. Can anyone say what is the main use of interface in C# and Java. Where its used mostly?.

Posted 15-Apr-12 20:01pm

Velkumar Kannan

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VJ Reddy · Answer 1 · 2012-04-15T20:48:00

Solution 3

An interface is used to define a contract for a class or struct to implement. There are several uses of interfaces. As it is said in the question interfaces are used in C# as an alternative to multiple inheritance. Interfaces with extension methods are used extensively in LINQ. Lot of answers were given on this topic here
Purpose of Interfaces[^]
I think it may be useful to you.

Posted 15-Apr-12 20:48pm

VJ Reddy

Comments

Sergey Alexandrovich Kryukov 16-Apr-12 22:34pm

My 5, mostly for mentioning struct. Too many developers, being asked if an interface can be implemented by a structure, would answer "no". I also was under the influence of this myth for a long time, until I finally checked it up. With multiple inheritance for interfaces, it brings a new quality to polymorphism: the set of element types can be abstracted from the nature of types (reference vs value types), and the type do not have to belong to the hierarchy of a compile-time element type.
--SA

VJ Reddy 16-Apr-12 23:38pm

Thank you very much, SA, for appreciation and additional points.

sravani.v · Answer 2 · 2012-04-15T20:06:00

Solution 1

Refer this:

http://www.informit.com/articles/article.aspx?p=1336795[^]

Posted 15-Apr-12 20:06pm

sravani.v

yogiCsharp · Answer 3 · 2012-04-15T20:08:00

Solution 2

I guess Interfaces are mostly used in C# to create a blue print of a class, like what members class would have etc.

Posted 15-Apr-12 20:08pm

yogiCsharp