Java Note (2) interface as reference data type

Interface as reference data type

Inter.java

 Public Interface Inter {    void  USB ();}

Test.java

 Public classTest {private Inter Inter;  PublicInter Getinter () {return Inter; }     Public voidSetinter (Inter Inter) { This.Inter=Inter; }         Public voidGo () { Inter.USB (); }     Public Static voidMain (string[] args) {}}

in the code "private    Inter Inter, the reference data type Inter for a private Inter is defined. 

Here, we can assume that "inter" has a double attribute:
First, it can be used as a property,
Second, it can also be used as an object.

Java Note (2) interface as reference data type