内部类

 1 class Outer{
 2     private String info = "hello";
 3     class Inner{
 4         public void print(){
 5             System.out.println(info);
 6         }
 7     }
 8     public void fun(){
 9         new Inner().print();
10     }
11 }
12 
13 public class InnerClassDemo01 {
14 
15     public static void main(String[] args) {
16         new Outer().fun();
17     }
18 
19 }