Java Learning 5 Interface

The interface is not a class, but a special name, using the interface keyword. Subclasses can implement multiple interfaces.

Interface implementation:

public class child extends Parent implements interfaceone,interfacetwo{}

The interface provides only the behavior signature of the object, without any implementation.

It cannot be instantiated directly, it can only be used when the quilt class is implemented as a specific type.

Interfaceone one = new Child ();

The use of interfaces, but also bring the advantages of the parent-class programming, the code is more general and clear.

Definition of the interface:

public interface service{

int data = 10;

void send (int data);

int receive ();

}

Java Learning 5 Interface