Interface

An interface can be used as a template for other classes. Its purpose is to be inherited. It sounds like an abstract class. However, in the interface, you cannot declare variables unless they are constants. In addition, methods can be declared, but those are without bodies. The bodies of the methods need to be put in the classes that implement the interface.


Example:

 class Dog : Animal //implement Animal interface

    {

        private string dogName;

        private int numberOflegs;

        public void setdogName(string name) { dogName = name; }

 

        public string getdogName() { return dogName; }

        public void setnumberOflegs(int n) { numberOflegs = n; }

 

        public int getnumberOflegs() { return numberOflegs; }

    }

 

 

interface Animal

{

   void setnumberOflegs(int n);

   int getnumberOflegs();

}




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