How Java Android implements the interface definition

============ Problem Description ============

The programming foundation is not very good ... I know there's an interface, but it doesn't work. To find a simple example ....

Normal Android programming time, such as button click event ... It is necessary to implement Onclicklistener interface ...

Private class Listent implements onclicklistener{@Overridepublic void OnClick (View v) {This interface will have a parameter V, which is the click event of the Control}}

I would like to follow the example above, the test class inside the definition of an interface See,see interface has a show (String info) .... The info inside this show method is the value of the member variable MSG in the class test.

PUBILC test{Private String msg;//is this class an abstract class? Can there be other functions implemented, such as Test_namepublic void Test_name () {log.i ("AAA", "Success");}  How do I get the interface?  public interface See {void showinfo (String info); }}

Then I use this class later, when the new class will implement this interface, according to the Showinfo info value to do other things

Private class Listent implements see{@Overridepublic void Showinfo (String info) {//Do other things}};//there's no way to use test_name in the class. Method?

============ Solution 1============

This is not an abstract class that allows implementations of other functions.

How Java Android implements the interface definition