Interfaces

What is an Interface ?

Interfaces are the contracts in the outside world.

What it mean ?

Take an example, let us assume, there is a standard for all mobile phones, As per the standard, below are the basic functionality for the mobile phones to provide. 

 

Vendor1 provides the functionality for the mobile in language JAVA

Vendor2 provides the functionality for the mobile in language C++

Vendor3 provides the functionality for the mobile in language JAVA

Vendor4 provides the functionality for the mobile in language C

that mean all the vendors providing the same functionality, but the way they are providing is different.

One more example is IBM JAVA, Oracle JAVA are providing the functionality for JAVA, but the way they implemented the features is different.

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