java 设置嵌套泛型

 1 class Info<T,V>{
 2     private T var;
 3     private V value;
 4     public Info(T var,V value){
 5         this.setVar(var);
 6         this.setValue(value);
 7     }
 8     public T getVar() {
 9         return var;
10     }
11     public void setVar(T var) {
12         this.var = var;
13     }
14     public V getValue() {
15         return value;
16     }
17     public void setValue(V value) {
18         this.value = value;
19     }
20     
21 }
22 class Demo<S>{
23     private S info;
24     public Demo(S info){
25         this.setInfo(info);
26     }
27     public S getInfo() {
28         return info;
29     }
30     public void setInfo(S info) {
31         this.info = info;
32     }
33 }
34 public class GenericsDemo {
35         public static void main(String[] args) {
36             Demo<Info<String,Integer>> d=null;
37             Info<String,Integer> i=null;
38             i=new Info<String,Integer>("Lixinghua",30);//注意此处
39             d=new Demo<Info<String,Integer>>(i);//注意此处
40             System.out.println("content1:"+d.getInfo().getVar());
41             System.out.println("content2:"+d.getInfo().getValue());
42         }
43 }