- Interface same as abstract class, we can't create object of interface class but we implement interface class to another class.
- All methods declared in an interface must be public, this is the nature of an interface. To implement an interface, the implements operator is used.
- Interface class method are define only but it declare out side class where it implement.
- Interface support multiple inheritance

interface Interface_A { }
interface Interface_B { }
interface Interface_C { }
interface MyInterface extends Interface_A, Interface_B, Interface_C { }