Java中接口包含接口

在android中经常有这样的类

?

类

package cn.edu.test_02;public interface  Test_02 {//interface or class or abstract classinterface Message{void showMessage();}}

?

实现类

?

package cn.edu.test_02;public class Sub_Test_02 implements Test_02.Message{@Overridepublic void showMessage() {// TODO Auto-generated method stubSystem.out.println("showMessage");}}

?

调用

package cn.edu.test_02;public class Test_02_App {public static void main(String [] args){Test_02.Message msg=new Sub_Test_02();msg.showMessage();}}