9-接口
1 package com.example; 2 interface A{ 3 public final String name = "xiaoyu"; 4 public abstract void tell(); 5 6 } 7 8 class People implements A{ 9 10 @Override 11 public void tell() { 12 System.out.print(name); 13 } 14 } 15 16 public class MyClass { 17 //1.接口里面全部是由全局常量和公共的抽象方法所组成 18 public static void main(String[] args){ 19 People p = new People(); 20 p.tell(); 21 } 22 }